[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "1"]
[White "Trois, Francisco R Torres"]
[Black "Camara, Helder"]
[Result "0-1"]
[ECO "E50"]
[WhiteElo "2385"]
[BlackElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "80"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 11,80,26,36,20,39,34,50,32,35,21,58,46,56,15,22,-6,0,0,0,0,0,0,0,0,8,0,
3,0,0,0,0,0,0,0,8,8,29,0,0,0,0,0,0,0,8,8,12,11,11,11,14,7,12,4,4,5,5,7,6,0,2,2,
0,0,0,0,0,0,0,-631,-610]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6.
Nf3 d6 7. Bd2 {E50: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3.} Nc6 ({RR} 7... b6
8. d5 exd5 9. cxd5 Bb7 10. Bc4 {[%eval -88,26]} (10. e4 $11 {[%eval -11,29]})
10... Na6 11. Qb3 Nc7 12. Rd1 a6 13. a3 Ba5 14. a4 Rb8 15. O-O b5 16. axb5 {[#]
} Bxc3 $1 17. bxa6 {[%eval -213,27] [#]} (17. Bxc3 $17 {[%eval -109,31]} axb5
18. Bxf6 Qxf6 19. Be2) 17... Bxa6 $2 {[%eval -3,31]} (17... Bxd2 $1 $19 {
[%eval -213,27]} 18. a7 Bb4 19. axb8=N Qxb8) 18. Qxc3 Ncxd5 19. Qc2 Bxc4 20.
Qxc4 Rxb2 21. e4 Nb6 22. Qc1 {Khismatullin,D (2654)-Antipov,M (2569)
Khanty-Mansiysk 2015 1/2-1/2 (50)}) ({RR} 7... cxd4 8. Nxd4 Nc6 9. a3 Bc5 10.
Nf3 a6 11. Qc2 Bd7 12. Ng5 h6 13. Nge4 Nxe4 {[%eval 22,28]} ({Better is} 13...
Ba7 $15 {[%eval -45,23]}) 14. Nxe4 f5 15. Nxc5 dxc5 16. Bc3 e5 17. b4 Qe7 18.
Qb2 f4 19. O-O-O {[%eval -109,26]} (19. Be4 $11 {[%eval -18,32]}) 19... fxe3
20. fxe3 cxb4 21. axb4 a5 22. b5 {[%eval -258,23] Trisic,A (2348)-Sarana,A 
(2668) Novi Sad SRB 2022 0-1 (36)} (22. bxa5 $17 {[%eval -109,26]} Bf5 23. Rd2)
) 8. a3 Ba5 9. Qc2 $146 {White is slightly better.} ({RR} 9. O-O e5 10. d5 Ne7
11. e4 Ng6 12. Ne1 Bxc3 13. Bxc3 Nf4 14. Bc2 Ng4 15. Bd2 Qh4 {[%csl Gg4][%cal
Rh4h2]} 16. Nf3 Nh3+ 17. gxh3 Qxh3 18. Qe2 f5 19. Rfc1 $2 {[%eval -270,31]
[%mdl 8192]} (19. Rfe1 $1 $11 {[%eval 0,31]}) 19... fxe4 20. Bxe4 Bf5 21. Rc3
$2 {[%eval -524,26]} (21. Qf1 {[%eval -215,30] was the crucial defense.} Qxf1+
22. Rxf1 Bxe4 {[%mdl 64] Discovered Attack} 23. Ne1) 21... Bxe4 22. Qxe4 Rf7
23. a4 Raf8 {Rapp,R (2350)-Dudek,R (2300) Germany 1989 1/2-1/2 (41)}) ({
Predecessor:} 9. O-O e5 10. d5 Ne7 11. Ng5 Bxc3 12. Bxc3 h6 13. Ne4 Nxe4 14.
Bxe4 f5 15. Bc2 {1-0 (39) Litmanowicz,W-Blaszczak,C Wroclaw 1955}) 9... cxd4
10. Nxd4 Nxd4 11. exd4 Bb6 12. Ne2 e5 13. c5 e4 14. cxb6 exd3 15. Qxd3 Qxb6 16.
O-O Re8 17. Nc3 Qb3 18. Rfe1 {Strongly threatening Bg5.} Be6 19. Bf4 Rac8 20.
Qd2 Nd5 21. Bxd6 Nxc3 22. bxc3 Rxc3 23. Rab1 Qc4 24. Rb4 Qd3 25. Qxd3 Rxd3 26.
Rxb7 Rxd4 27. Bc5 Ra4 (27... Rc4 {is interesting.} 28. Bxa7 Rc3 29. Ra1 Ba2 30.
Rb2 Rxa3 31. h3 Rxa7 32. Raxa2 Rxa2 33. Rxa2 Re1+) 28. Rxa7 Rxa7 29. Bxa7 $11 {
[%mdl 4096] Endgame KRB-KRB} Rc8 30. Ra1 Bb3 31. Rb1 h5 32. h4 Rc3 33. Bd4 Rd3
34. Bc5 f6 35. f3 Kf7 36. Kf2 g5 37. hxg5 fxg5 38. Be3 g4 39. Ke2 Bc4 {
Threatens to win with ...Rb3+.} 40. Rb7+ $2 {[%eval -631,26][%mdl 8192]} (40.
Rc1 $11 {[%eval 0,47]} Ba6 41. fxg4) 40... Rd7+ $1 {[%mdl 64] Discovered
Attack. Accuracy: White = 78%, Black = 90%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "1"]
[White "Segal, Alexandru Sorin"]
[Black "Filguth, Rubens Alberto"]
[Result "1/2-1/2"]
[ECO "C15"]
[BlackElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "80"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Be7 6. Nxe4 b6 7. N2c3 Nf6 8.
Be3 Bb7 9. Bd3 Nbd7 10. O-O Nxe4 $146 ({RR} 10... O-O 11. Qe2 Qc8 12. Rad1 c5
13. dxc5 Nxc5 14. Nxc5 Bxc5 {0-1 (14) Vasile,C (1686)-Yang,D (2124) Kemer 2007}
) 11. Bxe4 Bxe4 12. Nxe4 O-O 13. Qd2 Nf6 14. Nxf6+ Bxf6 15. c4 Qd7 16. Rfd1
Rfd8 17. Qc2 Qc6 18. Rd2 Rd7 19. a4 Rad8 20. Rad1 a6 21. f3 Qb7 22. Qe4 c6 23.
b3 b5 24. axb5 axb5 25. h3 h6 26. Bf2 Ra8 27. d5 cxd5 28. cxd5 exd5 29. Rxd5
Rxd5 30. Rxd5 Qc7 31. Rd1 Rd8 32. Rxd8+ Qxd8 33. Kh2 g6 34. Bg3 h5 35. Be5
Bxe5+ 36. Qxe5 Qd3 37. Qe8+ Kg7 38. Qe5+ Kh7 39. b4 Qb3 40. Qd6 Kg7 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "1"]
[White "Masculo, Jose Soares"]
[Black "Ary, Edgar Nadra"]
[Result "1/2-1/2"]
[ECO "A36"]
[Annotator "Stockfish 16"]
[PlyCount "25"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. g3 {[%eval 1,0]} c5 {[%eval 16,0]} 2. Bg2 {[%eval 19,0]} Nc6 {[%eval 15,0]}
3. c4 {[%eval 2,0]} g6 {[%eval 24,0]} 4. Nc3 {[%eval 15,0]} Bg7 {[%eval 12,0]}
5. e3 {[%eval 0,0]} e6 {[%eval 9,0]} 6. Nge2 {[%eval 7,0]} Nge7 {[%eval 0,0]}
7. O-O {[%eval 0,0]} O-O {[%eval 13,0]} 8. d4 {[%eval 1,0]} cxd4 {[%eval 17,0]}
9. Nxd4 {[%eval 1,0]} (9. exd4 d5 10. cxd5 Nxd5 11. Nxd5 exd5 12. Be3 Bf5 13.
Nc3 Be6) 9... d5 {[%eval 4,0]} 10. cxd5 {[%eval 7,0]} Nxd4 {[%eval 15,0]} (
10... Nxd5 11. h4 h5 12. Rb1 Rb8 13. Re1 Re8 14. Ne4 Bd7 15. Nd6) 11. exd4 {
[%eval 21,0]} Nxd5 {[%eval 3,0]} (11... exd5 12. Re1 Be6 13. Bg5 Re8 14. Qd2
Qd7 15. Bh6 Bh8) 12. Nxd5 {[%eval 2,0]} (12. h4 Ne7 13. Qb3 Qa5 14. Rd1 Nf5 15.
Ne2 Qa6 16. Bf3 Bd7) 12... exd5 {[%eval 3,0]} 13. Be3 {[%eval 6,0] PRECISÃO
LICHESS: Brancas 98% Pretas 99%} 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "1"]
[White "Pimenta, Jeronimo Marques"]
[Black "Sunye Neto, Jaime"]
[Result "1/2-1/2"]
[ECO "E52"]
[BlackElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "81"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. e3 Bb4 6. Bd3 O-O 7. O-O d5 8. cxd5
exd5 9. Ne5 Nbd7 10. Nxd7 ({RR} 10. f4 a6 11. Rf3 Re8 12. Rh3 Nf8 13. Bd2 Bd6
14. Be1 Bc8 15. Rf3 Ng6 16. Nc6 Qd7 17. Ne5 Qd8 18. Nc6 Qd7 19. Ne5 {1/2-1/2 
(19) Wei,Y (2714)-Bachmann,A (2609) Moscow 2016}) 10... Qxd7 11. Ne2 Bd6 12.
Bd2 ({RR} 12. Ng3 Ne4 13. Qc2 Rfe8 14. a3 g6 15. b4 h5 16. Re1 h4 17. Nxe4 dxe4
18. Bc4 b5 19. Bb3 Qf5 20. Qe2 Bc8 21. f4 c6 22. Bd2 Be6 23. Bxe6 Qxe6 24. Rec1
Be7 25. h3 Red8 26. Be1 a6 {Vo Thi Kim Phung (2348)-Munkhzul,T (2246) Hangzhou
CHN 2023 1-0 (82)}) 12... c5 $146 ({RR} 12... Rfe8 13. b4 Ne4 14. Be1 Qe7 15.
b5 Qh4 16. g3 Qh6 17. Nf4 Rad8 18. h4 g6 19. Rc1 Qf8 20. Qb3 Nf6 21. a3 Bxf4
22. exf4 Qd6 23. f5 Ne4 24. fxg6 hxg6 25. Kg2 Rd7 26. f3 Nc5 27. dxc5 {Knuth,H
(2275)-Issing,P (2275) Germany 2000 1-0 (34)}) 13. Rc1 Qe7 14. Ng3 g6 15. Bc3
c4 16. Bc2 b5 17. Ba5 b4 18. Re1 Qd7 19. Qf3 Kg7 20. a3 bxa3 21. bxa3 Bxa3 22.
Rb1 Bd6 23. Bc3 Rae8 24. e4 Bxg3 25. e5 Bh4 26. g3 Ne4 27. gxh4 Nxc3 28. Qxc3
Bc6 29. Qf3 f6 30. Qg3 fxe5 31. Rxe5 Qf7 32. Rg5 Qf4 33. Rxg6+ Kh8 34. Qxf4
Rxf4 35. Rxc6 Rg8+ 36. Kf1 Rgf8 37. Ba4 Rxf2+ 38. Kg1 R2f4 39. Rc7 Rxd4 40. Bc2
Rxh4 41. Kh1 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "1"]
[White "Rocha, Antonio Cavilhas"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[ECO "D46"]
[WhiteElo "2385"]
[BlackElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "40"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 e6 5. Nbd2 Nbd7 6. Bd3 Bd6 7. O-O O-O 8. e4
dxe4 9. Nxe4 Nxe4 10. Bxe4 h6 11. b3 Nf6 12. Bc2 b5 13. c5 Bc7 14. Bb2 ({RR} 
14. a3 a5 15. Bd2 Qd5 16. Re1 Rd8 17. Qc1 Ba6 18. Bxh6 b4 19. Bg5 Kf8 20. a4
Ke8 21. h3 Kd7 22. Ne5+ Kc8 23. Nxf7 Rf8 24. Ne5 Qxd4 25. Nxc6 Qxc5 26. Bf5 Qc3
27. Rxe6 Kb7 28. Bxf6 Rxf6 {Landa,K (2609)-Megaranto,S (2499) Vlissingen 2005
1-0 (32)}) ({RR} 14. a3 a5 15. Re1 Nd5 16. Bd2 f5 17. g3 Qf6 18. Ne5 Bxe5 19.
Rxe5 Bd7 20. Qe1 a4 21. bxa4 bxa4 22. Rb1 Ra7 23. Ba5 h5 24. Bd2 h4 25. Qc1
hxg3 26. hxg3 Kf7 27. Bg5 Qg6 28. Bd1 Kg8 {Maksimenko,A (2423)-Ramadugu,A 
(2051) Lorca ESP 2023 1-0 (49)}) 14... Nd5 15. g3 $146 ({RR} 15. a3 Qf6 16. g3
Rd8 17. Qe2 b4 18. a4 h5 19. Nd2 g6 20. Ne4 Qg7 21. Rfe1 e5 22. dxe5 Bxe5 23.
Bxe5 Qxe5 24. Nd6 Qg7 25. Bd3 Qd4 26. Rac1 Nc3 27. Qf3 Rf8 28. Bc4 Bg4 29. Qxc6
Rad8 {Mohr,S (2400)-Gehrke,R Zuerich 1997 1-0 (35)}) 15... a5 16. Ne5 Bxe5 17.
dxe5 Nb4 18. Qe2 Qe7 19. a3 Nxc2 20. Qxc2 Rd8 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "1"]
[White "Braga, Cicero Nogueira"]
[Black "Carvalho, Herbert Abreu"]
[Result "1-0"]
[ECO "A04"]
[BlackElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "71"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 18,71,24,35,54,48,98,100,85,82,102,77,117,109,128,119,103,103,111,101,
106,103,159,126,127,134,259,260,246,252,288,214,229,173,217,208,353,230,228,
226,192,200,196,186,394,306,306,202,520,522,1010,1012,925,924,29996,29997]} 1.
Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. d3 e6 6. e4 Nge7 7. c3 O-O 8. d4 cxd4
9. cxd4 d5 10. e5 Bd7 $146 {A04: Unusual lines after 1 Nf3 and King's Indian
Attack.} ({Predecessor:} 10... f6 11. Re1 fxe5 12. dxe5 Bd7 13. Nc3 Rc8 14. Bf4
Nf5 15. Qd2 Na5 16. b3 b5 17. Bg5 Qb6 18. g4 Nh6 19. Bxh6 Bxh6 20. Qxh6 Rxf3
21. Bxf3 Rxc3 22. Qf4 Nc6 23. Bxd5 Nd4 24. Rad1 {1-0 (24) Ljubojevic,L-Tatai,S
Manila 1973}) 11. Nc3 Na5 ({RR} 11... f6 12. exf6 Bxf6 13. Bh6 Re8 {[%eval 89,
23]} (13... Rf7 $1 $11 {[%eval 7,27]}) 14. Bf4 {[%eval 7,27]} (14. Bh3 $16 {
[%eval 89,23]}) 14... Nf5 15. Nb5 g5 16. Bc7 (16. Nxg5 $5 Re7 17. Nf3 $14)
16... Qc8 17. g4 $2 {[%eval -244,25]} (17. Bd6 $15 {[%eval -35,31]}) 17...
Nfxd4 $1 18. Nbxd4 Qxc7 19. Rc1 Qf4 20. Nxc6 Bxc6 21. h3 e5 22. Re1 Rad8 23.
Qb3 {[%eval -442,24]} (23. Rc2 $142 {[%eval -300,29]}) 23... e4 24. Nh2 Bd4 25.
Rc2 a5 26. Nf1 {Seul,G (2372)-Redzisz,M (2319) chess.com INT 2021 1-0 (48)})
12. Bf4 Rc8 {White is better.} 13. Rc1 b5 $146 ({RR} 13... Nc4 14. b3 $1 {
[%cal Rb3c4]} Na3 15. Qd2 b5 {[%eval 225,30]} (15... Re8 $16 {[%eval 140,29]})
16. Bg5 b4 {[%eval 318,25]} (16... a5 $142 {[%eval 205,29]} 17. h4 b4) 17. Nxd5
exd5 18. Qxb4 f6 $2 {[%eval 468,25]} (18... Nc2 {[%eval 256,30] was worth a
try.} 19. Qxe7 Qxe7 20. Bxe7 Bh6 21. Bxf8 Kxf8) 19. exf6 Bxf6 20. Bxf6 Rxf6 21.
Rxc8 Bxc8 22. Qxa3 Qf8 23. Ne5 Ra6 24. Qb2 Qd8 25. b4 Rb6 26. a4 Qd6 27. b5 a6
28. Rc1 {Klein,C (2052)-Lang,M (2137) Germany 2010 1-0 (37)}) 14. b3 Qb6 15.
Bg5 Rfe8 16. Qd2 b4 17. Ne2 $1 Bf8 18. Rfe1 Rxc1 19. Rxc1 Bb5 {[%eval 159,25]}
({Black should try} 19... Rc8 {[%eval 103,28]}) 20. Bf1 Nac6 21. g4 Bxe2 {
[%eval 259,27]} (21... a5 $16 {[%eval 134,27]}) 22. Bxe2 $18 ({And not} 22.
Qxe2 Nxd4 23. Nxd4 Qxd4 $11) 22... a5 23. Kg2 Nb8 24. Bh6 Nd7 25. Bxf8 Nxf8 26.
Qf4 Nc6 {[%eval 353,24]} (26... Qb8 $142 {[%eval 208,28]} 27. Rc5 f5 28. Rxa5
fxg4 29. Qxg4 Nf5) 27. Rc5 {aiming for Bb5.} Nd7 {[#]} 28. Rc1 $1 ({Less
strong is} 28. Rb5 Qa7 $14) 28... Kg7 29. h4 h6 {[#]} 30. h5 $1 {Strongly
threatening g5.} Ne7 $2 {[%eval 394,26]} (30... g5 {[%eval 186,28] was
necessary.} 31. Nxg5 hxg5 32. Qxg5+ Kf8) 31. Rh1 {Threatens to win with hxg6.}
Rh8 32. g5 {Black must now prevent hxg6.} gxh5 $2 {[%eval 520,26]} (32... Nf5 {
[%eval 202,31] is a better chance.} 33. hxg6 fxg6) 33. Rxh5 hxg5 34. Nxg5 {
[%csl Gg5][%cal Rf4f7]} Nf5 35. Rxh8 {Intending Nxf7! and mate.} Kxh8 36. Qh2+
{Accuracy: White = 69%, Black = 45%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "2"]
[White "Sunye Neto, Jaime"]
[Black "Trois, Francisco R Torres"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "2360"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "108"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 15,108,4,8,-42,-42,-52,-42,-56,-54,-65,-72,-104,-71,-186,-179,-162,-167,
-172,-147,-165,-128,-136,-99,-135,-117,-164,-139,-174,-182,-181,-150,-171,-119,
-114,-56,-72,-46,-99,-102,-122,0,0,0,0,0,-154,0,-8,-10,-20,0,-48,-42,-103,-70,
-130,-9,-12,-10,-85,-78,-99,-71,-96,-67,-73,-75,-525,-511,-528,-531,-578,-579,
-556,-563,-711,-756,-696,-665,-807,-830,-806,-757,-788,-708,-695,-636,-2079,
-902,-29972,-29968,-29989,-29988,-29988,-29989]} 1. c4 g6 2. g3 Bg7 3. Bg2 Nf6
4. Nc3 O-O 5. e3 e5 6. Nge2 d6 7. O-O c6 8. d4 Re8 9. b3 {E61: King's Indian:
Early deviations for White, including Smyslov System.} ({RR} 9. e4 exd4 10.
Nxd4 Nbd7 11. Re1 Nc5 12. Bf4 {[%eval -30,26]} (12. h3 $14 {[%eval 32,25]})
12... Ng4 13. h3 Ne5 14. Bf1 $1 Qb6 15. Qd2 {[%eval -110,29]} (15. Rb1 $11 {
[%eval -23,27]}) 15... Ncd3 16. Bxd3 Qxd4 17. Be2 Qxd2 18. Bxd2 Bxh3 19. Rad1
a6 20. Be3 Be6 21. Rxd6 Bxc4 22. b3 Bxe2 23. Rxe2 Rad8 {Le,Q (2693)-Topalov,V 
(2752) Astana 2012 0-1 (49)}) ({RR} 9. Rb1 {[%eval -47,23] 9.h3 0.11} a5 {
[%eval 31,27]} (9... e4 $15 {[%eval -47,23]}) 10. a3 {[%eval -49,22]} (10. e4
$14 {[%eval 31,27]}) 10... Qc7 11. b4 axb4 12. axb4 Bf5 13. e4 Bg4 14. Be3 {
[%eval -27,28]} (14. d5 $14 {[%eval 35,28]}) 14... Qc8 {[%eval 77,24]} (14...
exd4 $11 {[%eval -27,28]} 15. Bxd4 Nbd7) 15. d5 cxd5 16. cxd5 Bh3 17. Qd3 Bxg2
18. Kxg2 Nbd7 {[%eval 190,24]} (18... Ng4 $16 {[%eval 85,26]}) 19. Nb5 Qb8 20.
Rfc1 Rd8 21. f3 Bf8 22. Rc2 Rc8 {[%eval 298,24]} (22... Ne8 $142 {[%eval 171,
28]} 23. Rd1 Ra4) 23. Rbc1 $2 {[%eval 103,30]} (23. Ba7 $1 $18 {[%eval 298,24]
[%cal Ra7b8][%mdl 512] and the rest is easy.} Rxa7 24. Rxc8 Qxc8 25. Nxa7)
23... Rxc2 {Alexiadis,H (2283)-Souleidis,G (2426) chess.com INT 2022 1-0 (61)})
9... e4 10. Ba3 Bf5 $146 ({RR} 10... d5 11. Nf4 Bg4 12. Qd2 g5 13. Nfe2 Qd7 14.
f3 exf3 15. Bxf3 Bh3 16. Bg2 Bxg2 17. Kxg2 dxc4 18. bxc4 Qe6 19. Rxf6 $2 {
[%eval -265,26]} (19. d5 $15 {[%eval -63,24]} cxd5 20. cxd5 Qxe3 21. Qxe3 Rxe3
22. Bc1) 19... Bxf6 20. e4 Qxc4 21. e5 {[%eval -292,24]} (21. Rf1 $142 {
[%eval -198,27]} Bd8 22. e5) 21... Bg7 $1 22. Qxg5 Nd7 23. Rf1 f6 {[%eval -149,
28]} (23... Nxe5 $1 $19 {[%eval -317,24] is more deadly.} 24. dxe5 Rxe5 {
[%mdl 64] Double Attack}) 24. exf6 {[%csl Gf6][%cal Rg5g7]} Rxe2+ 25. Nxe2 {
Paneque,P (2375)-Gonzalez,R (2385) Cuba 1997 0-1 (37)}) 11. Rc1 {Black is
slightly better.} h5 $146 ({Predecessor:} 11... Qd7 12. b4 Na6 13. Qa4 Nc7 14.
d5 cxd5 15. Qxd7 Bxd7 16. cxd5 Ncxd5 17. Nxd5 Nxd5 {1/2-1/2 (36) Sznapik,A-Hug,
W Stockholm 1969}) 12. b4 Nbd7 13. Qb3 Nb6 14. Rfd1 {[%eval -186,24]} (14. b5
$17 {[%eval -71,26] was called for.}) 14... d5 $1 $19 15. cxd5 cxd5 16. b5 Rc8
17. Rc2 g5 18. Rdc1 Bg4 19. Bc5 Nc4 20. Bf1 b6 21. Bb4 Be6 $1 22. Nb1 Qd7 $1
23. Nec3 Nd6 24. a4 Nf5 {[%eval -56,27]} (24... Bf8 $17 {[%eval -114,27]}) 25.
Na2 h4 26. Be1 hxg3 27. hxg3 Ng4 {[%eval 0,37]} ({Better is} 27... Nd6 $17 {
[%eval -122,27]}) 28. Rxc8 $11 Rxc8 29. Rxc8+ Qxc8 30. Qd1 $2 {[%eval -154,28]
[#]} ({White should play} 30. Be2 $11 {[%eval 0,37]}) 30... Ne7 $2 {[%eval 0,
33]} ({Black should try} 30... Nxg3 $1 $17 {[%eval -154,28][%mdl 512]} 31. fxg3
Nxe3) 31. Be2 Bf8 32. Nb4 Kg7 33. Nc3 Nf6 34. Qb3 {[%eval -103,26]} (34. Nb1
$15 {[%eval -42,27]}) 34... Qd7 35. Bd2 {[%eval -130,30]} (35. f3 $15 {[%eval
-70,28]}) 35... g4 {[%eval -9,30]} (35... Ng6 $17 {[%eval -130,30]}) 36. Bc1
Nh7 37. Ba3 {[%eval -85,25]} (37. Kf1 $1 $11 {[%eval -10,30] keeps the balance.
}) 37... Ng5 $17 38. Nc2 Nf3+ 39. Kg2 Nf5 40. Bxf8+ Kxf8 41. Nd1 $2 {[%eval
-525,24][%mdl 8192] [#]} (41. Qb1 $17 {[%eval -75,30]}) 41... f6 $1 $19 42.
Bxf3 exf3+ ({Less strong is} 42... gxf3+ 43. Kf1 $15) 43. Kf1 Qh7 {[%cal Rh7h1]
} 44. Ke1 {[#]} Nxg3 $1 {[%mdl 512] aiming for ...Ne4.} 45. fxg3 Qh2 {[%csl
Gf3][%cal Rh2e2]} 46. Qd3 {[#]} Bf5 $1 {[%mdl 512]} 47. e4 (47. Qxf5 Qe2#)
47... Bxe4 48. Qe3 Bxc2 49. Nf2 Qxg3 50. Kd2 Bg6 {White must now prevent ...
Qg2.} 51. Kc3 Qc7+ 52. Kb3 g3 {Black mates.} 53. Ng4 Qc2+ 54. Ka3 Qd3+ {
Accuracy: White = 34%, Black = 65%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "2"]
[White "Ary, Edgar Nadra"]
[Black "Filguth, Rubens Alberto"]
[Result "1/2-1/2"]
[ECO "C09"]
[BlackElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "62"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nc6 5. exd5 exd5 6. Bb5 Bd6 7. dxc5 Bxc5 8.
Nb3 Bd6 9. O-O Nge7 10. Bg5 O-O 11. Re1 f6 12. Bh4 Qb6 ({RR} 12... Bg4 13. Be2
Kh8 14. Bg3 Bxg3 15. hxg3 Nf5 16. Nfd4 Bxe2 17. Rxe2 Nfxd4 18. Nxd4 Re8 19.
Rxe8+ Qxe8 20. Nf3 Rd8 21. Qd2 d4 22. Re1 Qg6 23. a3 Qh5 24. Re4 Qd5 25. Qd3
Ne5 26. Nxe5 fxe5 27. Qe2 {Shah Moradi,M (2158)-Khanipour,A (1757) chess.com
INT 2021 1/2-1/2 (56)}) 13. Bxc6 ({RR} 13. Be2 Be6 14. Bg3 Ne5 15. Nfd4 Bd7 16.
a4 a6 17. a5 Qc7 18. c3 Rad8 19. Nc1 Bc8 20. Nd3 N7g6 21. Nf4 Nxf4 22. Bxf4
Rfe8 23. Bg3 Bc5 24. Bf1 Qf7 25. Qa4 Qg6 26. Re3 Ng4 27. Bd3 Qf7 {Gipslis,A 
(2535)-Kortschnoj,V (2670) Amsterdam 1976 1/2-1/2 (35)}) 13... bxc6 14. Bg3
Bxg3 $146 ({RR} 14... Nf5 15. Bxd6 Nxd6 16. Qd4 Nc4 17. Rab1 Bd7 18. Nc5 Bf5
19. Nd3 Nd2 20. Qf4 Nxf3+ 21. Qxf3 Bg6 22. Qe3 Rfe8 23. Qd2 h6 24. Rxe8+ Rxe8
25. h3 Qd4 26. Rd1 Qa4 27. a3 Rb8 28. Rc1 Qd4 29. Qe2 {Skara,M (1882)
-Jellinghaus,L (2069) Bochum 2005 0-1 (81)}) ({RR} 14... Nf5 15. Bxd6 Nxd6 16.
Qd4 Nc4 17. Re7 Bf5 18. Rae1 Rf7 19. Rxf7 Kxf7 20. Qf4 Bd7 21. Nbd4 c5 22. Nf5
Re8 23. Rxe8 Bxe8 24. b3 Na3 25. Nd6+ Kf8 26. Nxe8 Kxe8 27. Qa4+ {1-0 (27)
Jansa,V-Djukic,Z Nis 1977}) 15. hxg3 Nf5 16. Nfd4 Nd6 17. a4 a5 18. Re7 Rf7 19.
Rxf7 Nxf7 20. Qe1 Ne5 21. f4 c5 22. fxe5 cxd4 23. exf6 d3+ 24. Kh2 Ba6 25. Qe5
Bc4 26. Rf1 dxc2 27. Qe7 gxf6 28. Rxf6 Qxf6 29. Qxf6 Bxb3 30. Qe6+ Kf8 31. Qf6+
Ke8 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "2"]
[White "Masculo, Jose Soares"]
[Black "Pimenta, Jeronimo Marques"]
[Result "1-0"]
[ECO "B30"]
[Annotator "Stockfish 16"]
[PlyCount "107"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 9,107,25,64,62,256,237,273,280,279,242,301,308,311,321,327,308,313,311,
312,317,320,320,298,252,254,171,194,159,163,138,132,108,108,114,176,175,285,
285,276,281,303,293,337,333,336,318,321,313,322,338,339,342,338,329,334,338,
349,347,351,374,377,364,492,430,478,444,468,474,488,474,449,425,583,583,579,
580,561,525,526,527,610,588,585,555,637,626,660,648,525,525,635,606,527,525,
3343,3397,3571,3571,1036,834]} 1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 d6 5. d3
Bg4 6. h3 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} Bh5 $146 {
[%eval 256,27] [#]} (6... Be6 $14 {[%eval 62,30]}) ({Predecessor:} 6... Be6 7.
Nd5 Be7 8. O-O Nf6 9. Ng5 Bxd5 10. exd5 Nb8 11. Bb5+ Nbd7 12. Ne6 fxe6 13. dxe6
{0-1 (43) Tylor,T-Fine,R Hastings White Rock Pavilion 1935}) 7. Nxe5 $1 $18 {
[%mdl 64] Discovered Attack} dxe5 ({Worse is} 7... Bxd1 8. Bxf7+ Ke7 9. Nd5#)
8. Qxh5 {[%csl Gc4][%cal Rh5f7] White has a decisive advantage.} g6 9. Qd1 $146
({RR} 9. Qf3 {[%csl Gc4][%cal Rf3f7]} Qd7 10. Be3 b6 11. a4 Bg7 12. Nd5 {
1-0 (12) Baklan,V (2599)-Zhigalko,S (2219) Polanica Zdroj 2001}) 9... Qd7 10.
Nd5 O-O-O 11. Bg5 Nge7 12. Bf6 Rg8 13. Qg4 h5 14. Qxd7+ Kxd7 15. Bg5 Nxd5 16.
Bxd5 ({Don't take} 16. exd5 $6 Ne7 $18) 16... Be7 17. Bxc6+ ({And not} 17. Bxf7
Bxg5 18. Bxg8 Rxg8 $11) 17... bxc6 18. Be3 f5 19. f3 f4 20. Bf2 g5 21. Ke2 Rg7
{[%eval 176,24]} (21... a5 $16 {[%eval 114,31]} 22. a4 Rb8) 22. g3 $18 fxg3 {
[%eval 285,21]} (22... h4 {[%eval 175,31] was necessary.}) 23. Bxg3 Ke6 24. b3
Rf7 25. Raf1 Rg7 26. Bf2 Kd6 27. Rhg1 Rdg8 28. Rg2 Ke6 29. Rfg1 Kf7 30. Be3 Rg6
31. Rg3 R6g7 32. Kd2 a6 33. Kc3 Ke6 34. Kc4 h4 35. Rg4 Rf7 36. Bxc5 {White is
clearly winning.} Bxc5 37. Kxc5 Rxf3 {[#]} 38. Rxh4 $1 {[%mdl 512]} gxh4 39.
Rxg8 Rxh3 40. Kxc6 {[%mdl 4096] Endgame KR-KR} Rg3 41. Rf8 Rg2 42. c4 Rxa2 43.
b4 Rb2 44. Kc5 h3 {If Black can now play ...h2 this consolidates a bit.} 45.
Rh8 h2 46. Rh6+ Kf7 47. Kd6 Kg7 48. Rh3 Kf6 {intending ...Rd2.} 49. c5 Rd2 {
White must now prevent ...Rxd3+!} 50. Kc7 Rxd3 51. Rxh2 Rb3 52. Rh6+ Kg5 53.
Rb6 Kf4 54. Kb7 {Accuracy: White = 85%, Black = 54%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "2"]
[White "Carvalho, Herbert Abreu"]
[Black "Segal, Alexandru Sorin"]
[Result "0-1"]
[ECO "E17"]
[WhiteElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "83"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 e6 5. O-O Be7 6. b3 O-O 7. Bb2 d5 8. cxd5
exd5 9. d4 Nbd7 10. Nc3 a6 11. Rc1 ({RR} 11. Ne5 b5 12. a4 b4 13. Nxd7 Qxd7 14.
Na2 Rfd8 15. Nc1 c5 16. dxc5 d4 17. Bxb7 Qxb7 18. Bxd4 Ne4 19. Qc2 Qd5 20. Be3
Bxc5 21. Bxc5 Nxc5 22. Na2 Nxb3 23. Rad1 Nd4 24. Nxb4 Qe6 25. Qc7 Nxe2+ {
Chemin,V (2215)-Carvalho,H (2260) Nova Friburgo 1980 0-1 (34)}) 11... Bd6 12.
e3 Qe7 13. Qe2 $146 ({RR} 13. Qc2 Rac8 14. Rfd1 c6 15. Na4 Ne4 16. Ne5 Nef6 17.
Bh3 Rc7 18. Nxd7 Nxd7 19. Bxd7 Qxd7 20. Nxb6 Qh3 21. Qe2 Re7 22. Bc3 Re6 23.
Qf1 Qh5 24. Nd7 Rh6 25. Qg2 Re8 26. f3 Bc8 27. Ne5 Bh3 {Kouskoutis,G (2280)
-Guseva,M (2372) chess.com INT 2022 1-0 (38)}) ({RR} 13. Rc2 Ne4 14. Ne2 g6 15.
Nf4 Rfe8 16. Nd3 Rac8 17. Nfe5 Nxe5 18. dxe5 Ba3 19. Ba1 c6 20. f3 Nc5 21. f4
Nxd3 22. Qxd3 f5 23. g4 Rf8 24. gxf5 gxf5 25. Bh3 Qe6 26. Rg2+ Kh8 27. Bxf5
Rxf5 {Matlakov,M (2674)-Xu,Y (2507) chess.com INT 2022 1-0}) ({RR} 13. a4 Ne4
14. Ne1 Nxc3 15. Bxc3 a5 16. Nd3 c6 17. Re1 Nf6 18. Bb2 Rac8 19. Ne5 Rc7 20.
Rc2 c5 21. Qd3 Rb8 22. Rec1 Bc8 23. Nf3 h6 24. Nd2 Be6 25. dxc5 bxc5 26. Bxf6
Qxf6 27. Bxd5 Bf5 {Afanasiev,N (2537)-Smirnov,P (2538) Dzhubga RUS 2023 1-0 
(52)}) ({RR} 13. Qc2 Ne4 14. Nxe4 dxe4 15. Ne5 Nf6 16. Nc4 Ne8 17. Nxd6 cxd6
18. Ba3 Rc8 19. Qd2 Nc7 20. Qb4 Rcd8 21. d5 f5 22. Qxb6 Nxd5 23. Qd4 h5 24.
Rfd1 Rf6 25. Bf1 Kh7 26. Bc4 Nc7 27. h4 Rg6 {Bouchot,F (2113)-Fernandez Aguado,
J (2309) France 2006 1-0 (69)}) 13... Rfe8 14. Rfd1 Rad8 15. Ne1 Nf8 16. Nd3
Ng6 17. Qc2 Ne4 18. Nxe4 dxe4 19. Qc3 f6 20. a3 Bd5 21. Nb4 Bxb4 22. axb4 c6
23. Ra1 Ra8 24. Ra3 Ra7 25. Rda1 Rea8 26. Bf1 b5 27. Qc5 Qd7 28. Qb6 Ne7 29.
Rxa6 Rxa6 30. Rxa6 Rxa6 31. Qxa6 Bxb3 32. d5 Nxd5 33. Bd4 Bd1 34. Bc5 h5 35. h4
Bf3 36. Qa8+ Kh7 37. Kh2 Nc7 38. Qb7 Qd1 39. Bg2 Qe1 40. Qc8 Qxf2 41. Qf5+ Kh6
42. Qf4+ 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "2"]
[White "Camara, Helder"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "B68"]
[WhiteElo "2325"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "32"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8.
O-O-O Bd7 9. f4 Be7 10. Be2 O-O 11. Bf3 h6 ({RR} 11... Rc8 12. Nb3 Qb6 13. Bxf6
Bxf6 14. Qxd6 Be7 15. Qd2 Rfd8 16. Kb1 Bb4 17. a3 Be8 18. Qe1 Rxd1+ 19. Bxd1
Bf8 20. e5 Qc7 21. Ne4 b5 22. g4 a5 23. g5 a4 24. Nf6+ Kh8 25. Nxe8 Rxe8 26.
Nc1 {Wang Hao (2725)-Ding Liren (2812) China CHN 2019 1/2-1/2 (33)}) ({RR} 
11... Rc8 12. Nxc6 Bxc6 13. Kb1 Qb6 14. Ka1 Rfd8 15. Rhe1 h6 16. h4 d5 17. Bxf6
Bxf6 18. e5 Bxh4 19. g3 Bxg3 20. Rg1 Qf2 21. Ne2 Bh2 22. Rgf1 Qh4 23. Rh1 d4
24. Bxc6 Rxc6 25. Rdf1 Qh3 26. Nxd4 {Sokolovsky,Y (2416)-Greenfeld,A (2509)
Ramat Gan ISR 2021 1-0 (49)}) 12. Bh4 Nxe4 13. Bxe7 $146 ({RR} 13. Nxe4 Bxh4
14. Nxd6 Qc7 15. Nb3 Rad8 16. g3 Be7 17. Ne4 e5 18. Kb1 Bf5 19. Qc1 a5 20. a4
Nb4 21. g4 Bd7 22. Nc3 exf4 23. Nd4 Bf6 24. Ndb5 Bxb5 25. Nxb5 Qc4 26. b3 Qc5
27. Rxd8 Rxd8 {Cladouras,P (2355)-Ivanov,A (2525) Gausdal 1991 0-1}) 13... Nxd2
14. Bxd8 Nxf3 15. Nxf3 Rfxd8 16. Rxd6 Kf8 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "2"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Braga, Cicero Nogueira"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "81"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 19,81,29,56,51,62,54,110,111,156,150,153,155,165,182,184,187,172,83,97,
103,180,176,178,110,128,98,103,83,89,93,100,95,83,60,75,86,84,54,135,135,126,
131,162,160,194,121,172,170,177,177,175,163,144,87,194,16,10,18,117,116,536,
532,593,592]} 1. g3 g6 2. Bg2 Bg7 3. c4 d6 4. Nc3 e5 5. e3 Ne7 6. Nge2 O-O 7.
O-O Nbc6 8. Rb1 Be6 9. Nd5 Qd7 10. d3 Rae8 11. b4 {A25: English Opening vs
King's Indian with ...Nc6 but without early d3.} a6 ({RR} 11... Nd8 12. Nxe7+ {
[%eval 4,33]} (12. b5 $14 {[%eval 53,25]}) 12... Rxe7 13. Nc3 f5 {[%eval 43,26]
} (13... Ree8 $11 {[%eval 0,30] is superior.}) 14. b5 Ref7 15. Qb3 g5 {[%eval
92,24]} (15... f4 $14 {[%eval 39,28]}) 16. f4 $1 h6 17. a4 Kh8 18. Bb2 Rg8 19.
Ne2 Qe8 20. Rf2 {[%eval 108,27]} (20. fxe5 $142 {[%eval 152,17]} dxe5 21. Rbe1)
20... Re7 21. Qc2 Bc8 22. Rbf1 {[%eval 88,27]} (22. fxe5 $142 {[%eval 137,23]}
dxe5 23. Rbf1) 22... Qh5 {[%eval 213,27]} (22... exf4 $16 {[%eval 88,27]} 23.
exf4 g4) 23. c5 Be6 {[%eval 323,27]} (23... Nf7 {[%eval 204,21] was called for.
} 24. Nc3 gxf4) 24. cxd6 cxd6 25. fxe5 dxe5 26. Qc5 {Hjartarson,J (2605)
-Baragar,F (2310) Winnipeg 1997 1-0 (33)}) ({RR} 11... Nc8 12. b5 Nd8 13. a4 f5
14. Ba3 {[%eval 50,30]} (14. a5 $16 {[%eval 91,30]}) 14... c6 15. bxc6 bxc6 16.
Nb4 f4 {[%eval 73,25]} (16... Ne7 $11 {[%eval 23,25]}) 17. exf4 Bg4 18. f3 Bh3
19. fxe5 Bxg2 20. Kxg2 Rxe5 21. Bb2 Rh5 22. g4 Ra5 23. Bxg7 Qxg7 24. d4 {
[%eval 3,23]} (24. Qb3 $16 {[%eval 120,26]}) 24... Nb6 25. Qb3 Qf7 26. c5 {
Palma,M (1976)-Dappiano,A (2296) Palmanova ESP 2021 1-0 (51)}) 12. Nec3 $146 ({
RR} 12. Bd2 Nd8 13. a4 Nxd5 14. cxd5 Bh3 15. b5 Bxg2 16. Kxg2 axb5 17. Rxb5 f5
18. f4 {[%eval -9,28]} (18. Qb3 $14 {[%eval 45,29]}) 18... e4 {[%eval 77,21]} (
18... b6 $11 {[%eval -9,28] keeps the balance.}) 19. d4 $1 h6 {[%eval 111,25]}
({Black should play} 19... h5 $14 {[%eval 61,25]}) 20. Qb3 g5 21. Rc1 Qf7 22.
Qd1 Bf6 {1/2-1/2 (22) Zeuthen,S-Soby,F Esbjerg 1972}) ({RR} 12. a4 Nd8 13. Qc2
c6 14. Nb6 Qc7 15. c5 d5 16. e4 {[%eval 8,31]} (16. Na8 $14 {[%eval 63,29]} Qc8
17. Nb6) 16... dxe4 {[%eval 58,28]} (16... f5 $1 $11 {[%eval 8,31]}) 17. dxe4
f5 18. Nc4 Nf7 19. f3 {[%eval 4,26]} (19. Bh3 $1 $16 {[%eval 71,25]}) 19...
fxe4 20. fxe4 Nc8 21. Be3 Qe7 {[%eval 113,23]} (21... Bh6 $142 {[%eval 71,21]})
22. Nc1 Rd8 23. Nd3 Rd7 {[%eval 141,26]} (23... h6 $142 {[%eval 88,32]}) 24.
Rbd1 Rfd8 25. Ndb2 {[%eval 81,25]} (25. h4 $142 {[%eval 136,26]}) 25... Rxd1
26. Rxd1 Rxd1+ {Akvist,H-Wahlbom,M Skelleftea 1972 1-0 (53)}) ({Predecessor:} 
12. Bd2 Nd8 13. a4 Nxd5 14. cxd5 Bh3 15. b5 Bxg2 16. Kxg2 axb5 17. Rxb5 f5 18.
f4 e4 19. d4 h6 20. Qb3 g5 21. Rc1 Qf7 22. Qd1 Bf6 {1/2-1/2 (22) Zeuthen,
S-Soby,F Esbjerg 1972}) 12... Nd8 {[%eval 110,26]} (12... Bg4 $14 {[%eval 54,
32]} 13. f3 Be6) 13. b5 $16 {White is better.} axb5 {[%eval 156,24]} (13...
Nxd5 $142 {[%eval 111,30]} 14. cxd5 Bh3) 14. Nxb5 (14. Rxb5 Nc8 $11) 14... Bxd5
15. cxd5 c6 16. Nc3 f5 17. Qb3 {Strongly threatening dxc6+.} Kh8 18. f4 {
[%eval 83,30]} (18. a4 $18 {[%eval 172,24] is more deadly.}) 18... h6 19. Bd2
g5 {[%eval 180,27]} (19... exf4 $16 {[%eval 103,29]} 20. Rxf4 (20. gxf4 g5 $14)
20... Ng8) 20. fxg5 $18 hxg5 21. Rf2 {[%eval 110,26]} (21. a4 $18 {[%eval 178,
27]}) 21... f4 $16 22. Qd1 (22. gxf4 exf4 23. Qd1 Qf5 $14) 22... g4 {next ...
f3 is good for Black.} 23. Be4 fxg3 24. hxg3 Rxf2 25. Kxf2 {Threatens to win
with Qh1+.} Rf8+ 26. Kg2 {Qh1+ is the strong threat.} Nf7 {[#]} 27. Qh1+ $1 ({
Reject} 27. dxc6 $6 bxc6 28. Qh1+ Nh6 $15) 27... Nh6 28. Qh5 Rf6 {[%eval 135,
22]} (28... Qc7 $1 $14 {[%eval 54,27]}) 29. Rf1 Rxf1 30. Kxf1 Qc8 31. a4 {
[%cal Ba2a4,Ba4a5][%mdl 32]} Qg8 {[%cal Rc6d5]} 32. Qh1 $40 {[%eval 121,26]
[%mdl 128] White goes for the king.} (32. dxc6 $18 {[%eval 194,25]} bxc6 33.
Ke1) 32... Qc8 {[%eval 172,21]} (32... Qe8 $16 {[%eval 121,26] might work
better.} 33. Kg1 Kg8) 33. Ke1 $18 Kg8 34. Qh4 Kf8 35. a5 c5 36. Bg2 {[%eval 87,
31]} (36. Na4 $142 {[%eval 144,28]}) 36... c4 {[%eval 194,25]} (36... Qd7 $16 {
[%eval 87,31] was worth a try.}) 37. Bf1 $2 {[%eval 16,34]} ({White should try
} 37. Ne4 $18 {[%eval 194,25]} Nef5 38. Qg5 cxd3 39. Bf1) 37... Nef5 38. Qh2
cxd3 {[%eval 117,21]} (38... Qc5 $1 $11 {[%eval 18,31]}) 39. Bxd3 $16 Qc5 $2 {
[%eval 536,17][%mdl 8192] [#]} (39... Qe8 $16 {[%eval 116,25] is a better
chance.}) 40. Bxf5 $1 $18 Nxf5 41. Qf2 {Accuracy: White = 68%, Black = 48%.}
1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "3"]
[White "Filguth, Rubens Alberto"]
[Black "Carvalho, Herbert Abreu"]
[Result "0-1"]
[ECO "A36"]
[WhiteElo "2350"]
[BlackElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "48"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. g3 Nf6 4. Bg2 O-O 5. e4 c5 6. Nge2 Nc6 7. O-O d6 8. d3
e5 9. h3 Be6 10. Be3 ({RR} 10. f4 exf4 11. Bxf4 Qd7 12. Kh2 Ne8 13. Qd2 f5 14.
Rae1 Nf6 15. exf5 Bxf5 16. g4 Be6 17. Ng3 Kh8 18. Nb5 Ne8 19. Bh6 Rxf1 20. Rxf1
Nc7 21. Bxg7+ Kxg7 22. Nh5+ gxh5 23. Qg5+ Kh8 24. Qf6+ Kg8 {Ioseliani,N (2504)
-Jaracz,B (2293) Germany 1999 1-0}) ({RR} 10. f4 exf4 11. gxf4 Nh5 12. Be3 Qh4
13. Kh2 Nd4 14. Bf2 Qf6 15. Bxd4 cxd4 16. Nb5 Qh4 17. Qe1 Qd8 18. Nbxd4 Qb6 19.
Nxe6 fxe6 20. Qd2 Qc7 21. d4 e5 22. fxe5 dxe5 23. d5 Qxc4 24. Rac1 Qa4 {
Chidvilash,S (1753)-Md,R lichess.org INT 2022 1-0 (33)}) 10... Nh5 11. Qd2 Qd7
12. Kh2 Kh8 $146 ({RR} 12... Nd4 13. f4 f5 14. Nd5 Rab8 15. Nec3 a6 16. exf5
Nxf5 17. Bf2 Nd4 18. Bxd4 exd4 19. Ne4 Bxd5 20. cxd5 b5 21. Ng5 Bh8 22. Rae1
Rfe8 23. Ne6 Ng7 24. g4 Nxe6 25. dxe6 Qe7 26. Bd5 Rf8 27. b3 {Zakharov,I (2170)
-Asrian,A (2215) Kimry 2003 1/2-1/2 (47)}) ({RR} 12... f5 13. f4 exf4 14. Bxf4
Ne5 15. b3 Rf7 16. exf5 Bxf5 17. Ne4 Nxf4 18. Nxf4 Bxe4 19. Bxe4 Kh8 20. Nd5
Raf8 21. Qe2 Ng4+ 22. hxg4 Bxa1 23. Rxf7 Qxf7 24. Nf4 Be5 25. Bd5 Qe7 26. Qe4
g5 27. Nh3 {Jean,R (1732)-Drouot,F (2026) Montigny le Bretonneux 2012 1/2-1/2 
(87)}) 13. Rae1 Rae8 14. a3 Nd4 15. b4 f5 16. bxc5 f4 17. gxf4 Nxe2 18. f5 gxf5
19. Qxe2 Nf4 20. Bxf4 exf4 21. Nd5 fxe4 22. Qxe4 f3 23. Bxf3 Be5+ 24. Kh1 Bxd5
0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "3"]
[White "Rocha, Antonio Cavilhas"]
[Black "Sunye Neto, Jaime"]
[Result "1/2-1/2"]
[ECO "E14"]
[WhiteElo "2385"]
[BlackElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "21"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. d4 e6 4. e3 Bb7 5. Bd3 d5 6. O-O Bd6 7. Nbd2 O-O 8. Qc2
Nbd7 ({RR} 8... c5 9. dxc5 bxc5 10. e4 Nc6 11. cxd5 exd5 12. a3 Nd4 13. Nxd4
cxd4 14. exd5 Bxd5 15. Qd1 Qc7 16. h3 Qb7 17. Nf3 Rac8 18. Nh4 Rfe8 19. b4 Ne4
20. Nf5 Be5 21. Qg4 g6 22. f4 Bb8 23. Nh6+ {Makka,E (2004)-Vehi Bach,V (2216)
Platja d'Aro ESP 2023 1/2-1/2}) 9. e4 dxe4 10. Nxe4 Nxe4 $146 ({RR} 10... h6
11. b3 e5 12. Bb2 Re8 13. Rfe1 Nxe4 14. Bxe4 Bxe4 15. Qxe4 Nf6 16. Qc2 e4 17.
Nd2 Ng4 18. Nf1 f5 19. h3 Nf6 20. Ne3 f4 21. Ng4 Nxg4 22. hxg4 e3 23. f3 Be7
24. g3 Bg5 25. gxf4 {Straka,J (1903)-Pacher,M (2234) Slovakia 2007 0-1 (36)})
11. Bxe4 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "3"]
[White "Trois, Francisco R Torres"]
[Black "Masculo, Jose Soares"]
[Result "1/2-1/2"]
[ECO "E71"]
[WhiteElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "82"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 d6 6. h3 O-O 7. Bd3 e6 8. Bg5 exd5
9. exd5 Nbd7 10. f4 a6 11. a4 Re8+ ({RR} 11... Qe8+ 12. Nge2 Nh5 13. O-O f5 14.
Qc2 Ndf6 15. Rf3 Qf7 16. Kh1 Re8 17. Rb1 Ne4 18. Bxe4 fxe4 19. Rff1 e3 20. g4
Nf6 21. Ng3 Nxg4 22. hxg4 Bxg4 23. Rbe1 Qd7 24. f5 gxf5 25. Rxe3 Rxe3 26. Bxe3
{Damljanovic,B (2576)-Protsenko,R (2263) Belgrade 2012 1/2-1/2 (60)}) ({RR} 
11... Qe8+ 12. Nge2 Nh5 13. O-O Qe3+ 14. Kh2 Ne5 15. Be4 Bg4 16. Qc1 Qxc1 17.
Raxc1 Bxe2 18. Nxe2 Nd7 19. b3 f5 20. Bf3 Nhf6 21. Rce1 Rfe8 22. g4 fxg4 23.
hxg4 Re3 24. Nc1 Rae8 25. Bh4 Kf7 26. Kg2 {Spacek,O (2228)-Rybka,S (2208)
Slovakia SVK 2022 1/2-1/2 (59)}) 12. Nge2 h6 $146 ({RR} 12... b5 13. axb5 Qb6
14. O-O Bb7 15. Kh2 axb5 16. Rxa8 Bxa8 17. Nxb5 Ne4 18. Bxe4 Rxe4 19. Nec3 Re8
20. Re1 Rxe1 21. Qxe1 Nf8 22. Qe8 f6 23. Qxa8 fxg5 24. Ne4 {1-0 (24) Giessmann,
S (2197)-Cedikova,K (2144) Bayern 2010}) 13. Bh4 Nf8 14. O-O Qc7 15. Qc2 Bd7
16. b3 Qc8 17. Kh2 Bf5 18. Rae1 Re3 19. Nc1 Bxd3 20. Nxd3 Rxe1 21. Rxe1 N8d7
22. g4 Qf8 23. Qd2 Re8 24. Kg2 Rxe1 25. Qxe1 Qe8 26. Qxe8+ Nxe8 27. Ne4 Ndf6
28. Kf3 Kf8 29. Be1 Ke7 30. Ng3 Nd7 31. a5 Bh8 32. h4 Ba1 33. h5 Ndf6 34. b4
cxb4 35. Bxb4 Ng7 36. hxg6 fxg6 37. Ne5 g5 38. Ng6+ Kf7 39. f5 Nge8 40. Ne4
Nxe4 41. Kxe4 Bb2 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "3"]
[White "Segal, Alexandru Sorin"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[ECO "E18"]
[BlackElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "31"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4
Bxe4 9. Ne1 Bxg2 10. Nxg2 d6 11. b3 Nd7 ({RR} 11... Bf6 12. Bb2 c5 13. Rb1 cxd4
14. Bxd4 Nd7 15. Qd2 Rc8 16. Rfd1 Rc6 17. Bxf6 Nxf6 18. Ne3 Qb8 19. Qb4 a5 {
1/2-1/2 (19) Andersson,U (2605)-Karpov,A (2720) Mar del Plata 1982}) ({RR} 
11... Bf6 12. Bb2 c5 13. Rb1 cxd4 14. Bxd4 Bxd4 15. Qxd4 Nc6 16. Qd2 Qc7 17.
Rbc1 Rfd8 18. Rfd1 d5 19. cxd5 Rxd5 20. Qc3 Rc5 21. Qe3 Rd8 22. Ne1 Rxc1 23.
Rxc1 Rd6 24. Nf3 Qd7 25. Kg2 h6 {1/2-1/2 (25) Wen Yang (2588)-Xu Jun (2474)
Fuling CHN 2022}) 12. Bb2 c5 13. dxc5 $146 ({RR} 13. Qd2 cxd4 14. Bxd4 Qc7 15.
Rad1 Rfd8 16. Qb2 Nf6 17. Rd3 a6 18. Rfd1 b5 19. Ne3 h6 20. Kg2 Qb7+ 21. f3
Rac8 22. Qd2 Nd7 23. Ba1 bxc4 24. bxc4 Qc6 25. Ng4 Bf8 26. Qb2 f6 27. Qb1 Qxc4
{Pavlenko,O-Furman,S Batumi (Georgia) 1972 0-1 (67)}) ({RR} 13. d5 Bf6 14. Bxf6
{1/2-1/2 (14) Bartos,J (2216)-Pribyl,J (2250) Trebic CZE 2018}) 13... dxc5 14.
Qd2 Bf6 15. Bxf6 Nxf6 16. Rfd1 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "3"]
[White "Braga, Cicero Nogueira"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "C13"]
[BlackElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "18"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 gxf6 7. Nf3 b6 8.
Bc4 Bb7 9. Qe2 Bd5 $146 ({RR} 9... Nd7 10. O-O-O c6 11. Ng3 Qc7 12. Kb1 O-O-O
13. Rhe1 Bd6 14. Ne4 Bf8 15. Nfd2 Qxh2 16. Rh1 Qc7 17. Qh5 b5 18. Bb3 c5 19. c3
c4 20. Bc2 f5 21. Ng5 Rg8 22. Nxh7 Rxg2 23. Qxf7 Rxf2 24. Rhf1 {Boleslavsky,
I-Stolberg,M Moscow (Russia) 1940 1-0 (32)}) ({RR} 9... Nd7 10. O-O-O c6 11.
Nfd2 h5 12. h4 Nf8 13. c3 Ng6 14. Ng3 Nf4 15. Qe4 Qc7 16. Ne2 Nxe2+ 17. Qxe2 c5
18. Bb5+ Kf8 19. dxc5 Bxg2 20. Rhg1 Bd5 21. cxb6 axb6 22. Bc4 Bxc4 23. Qxc4
Qxc4 24. Nxc4 {Stukopin,A (2578)-Cruz,C (2547) Brownsville 2015 1/2-1/2 (60)})
({RR} 9... O-O 10. O-O-O c6 11. h4 Nd7 12. Kb1 Kh8 13. Nfg5 h6 14. Qh5 Kg7 15.
Nxf7 Rxf7 16. Bxe6 Rf8 17. Qg4+ Kh8 18. Qg6 c5 19. Qxh6# {1-0 (19) Garcia
Romero,B (2234)-Arroyo Rodriguez,J (2112) Marbella ESP 2019}) 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "3"]
[White "Pimenta, Jeronimo Marques"]
[Black "Ary, Edgar Nadra"]
[Result "1-0"]
[ECO "A71"]
[Annotator "Stockfish 16"]
[PlyCount "85"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 17,85,18,28,24,27,4,29,-49,-44,-46,-55,-125,-70,-69,0,-10,22,10,66,81,
123,114,290,287,291,251,250,224,380,337,500,491,486,473,569,571,679,669,636,
587,701,682,668,662,694,696,732,707,706,628,562,607,616,579,606,583,792,792,
792,792,795,689,29978,29979,29978,29980,29983,29984,29984,29985]} 1. d4 Nf6 2.
c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Bg5 h6 9. Bh4 a6
10. a4 {A71: Modern Benoni: 6 e4 g6 7 Nf3 Bg7 8 Bg5 without Be2.} g5 11. Bg3
Nh5 $1 12. Bd3 $146 {[%eval -49,24]} (12. Nd2 $11 {[%eval 29,27]} Nxg3 13. hxg3
) ({Predecessor:} 12. Nd2 Nxg3 13. hxg3 Nd7 14. Be2 Ne5 15. g4 Qd7 16. f3 Ng6
17. Nc4 Rb8 18. a5 {1-0 (32) Mooij,W-Bartis,G Finland 1977}) 12... Nxg3 13.
hxg3 Nd7 $146 ({RR} 13... Qa5 $2 {[%eval 122,24] 13...Nd7 -0.56 [#]} 14. Qc2 {
[%eval 49,26]} (14. Nd2 $1 $16 {[%eval 122,24]}) 14... b5 {[%eval 155,24]} (
14... Nd7 $14 {[%eval 49,26]}) 15. O-O b4 16. Nd1 O-O 17. Ne3 Qd8 {[%eval 182,
28]} (17... Nd7 $16 {[%eval 125,27]}) 18. g4 $2 {[%eval 22,25]} (18. Nc4 $18 {
[%eval 182,28]}) 18... Nd7 19. Nf5 Nf6 20. Nh2 {[%eval -67,25]} (20. e5 $11 {
[%eval -1,32]} dxe5 21. Nxe5 Bxf5 22. Bxf5) 20... Bxf5 21. gxf5 Nd7 22. Ng4 {
[%eval -128,25]} (22. Qe2 $11 {[%eval -26,26] remains equal.}) 22... h5 23. Ne3
g4 {[%eval -71,28]} (23... Bd4 $142 {[%eval -131,22]} 24. Nc4 Qf6) 24. g3 Ne5
25. Be2 {[%eval -121,25]} (25. Kg2 $15 {[%eval -62,27]}) 25... Qg5 26. Kg2 h4
27. gxh4 {[%eval -240,22] [#]} (27. Rh1 $17 {[%eval -90,24] keeps fighting.}
hxg3 28. Kxg3) 27... Qf4 $1 28. Rg1 {Chen,Y (2156)-Zuiderweg,E (2010)
Groningen 2014 1/2-1/2 (32)}) 14. O-O {[%eval -125,27]} (14. a5 $15 {[%eval
-55,27]}) 14... Qe7 15. Ra3 b6 {[%eval -10,28]} ({Better is} 15... h5 $15 {
[%eval -69,24]}) 16. Rb3 $11 Rb8 17. Qe2 Ra8 {[%eval 66,27]} ({Black should try
} 17... O-O $11 {[%eval 10,26]}) 18. Nd1 $14 Qd8 19. Ne3 Ne5 $2 {[%eval 290,25]
} (19... O-O $16 {[%eval 114,27]}) 20. Nxe5 $18 dxe5 21. Bc4 O-O 22. d6 Be6 $2
{[%eval 380,27]} (22... b5 {[%eval 224,30]}) 23. Rd1 Qb8 {[%eval 500,27]} (
23... Bd7 {[%eval 337,29] was worth a try.} 24. Ra3 Qf6 25. Bxa6 Rfd8) 24. Bxe6
fxe6 25. Qg4 Kf7 26. Nc4 {[%cal Be3c4,Bc4e5,Be5f7][%mdl 32]} b5 27. Rf3+ Kg8
28. Qxe6+ Kh8 29. Rxf8+ Qxf8 30. Nxe5 Qf6 31. Nf7+ Kg8 32. Nxh6+ Kh7 33. Qxf6
Bxf6 {[%mdl 4096] Endgame KRB-KRN} 34. Ng4 Bxb2 35. axb5 axb5 36. e5 c4 37. e6
{aiming for d7.} c3 38. Ne3 Ba3 39. Ra1 Kg6 40. d7 {White mates.} Kf6 {[#]} 41.
Rxa3 $1 Rb8 (41... Rxa3 42. d8=Q+) 42. Rxc3 Kxe6 43. Rc8 {Accuracy: White =
82%, Black = 34%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "4"]
[White "Sunye Neto, Jaime"]
[Black "Braga, Cicero Nogueira"]
[Result "0-1"]
[ECO "E92"]
[WhiteElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "112"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 20,112,97,31,85,60,67,49,61,64,53,67,102,95,92,79,64,0,30,-83,-60,-151,
-159,-154,-157,-156,-146,-174,-147,-260,-267,-329,-332,-317,-330,-321,-314,
-319,-280,-469,-473,-436,-325,-331,-334,-328,-313,-321,-297,-293,-278,-350,
-319,-353,-350,-387,-322,-543,-548,-547,-541,-489,-457,-493,-358,-388,-390,
-494,-500,-497,-492,-485,-480,-619,-631,-635,-619,-665,-656,-616,-634,-667,
-587,-702,-691,-727,-735,-734,-724,-875,-794,-29976,-29975,-29977,-29980]} 1.
c4 g6 2. d4 Nf6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3 Ng4 8. Bg5 f6
9. Bc1 Nc6 10. d5 Ne7 11. Nd2 $146 {[%eval 31,26]} (11. h3 $16 {[%eval 97,23]}
Nh6 12. O-O) ({Predecessor:} 11. h3 Nh6 12. O-O Nf7 13. b4 f5 14. Ng5 Nxg5 15.
Bxg5 f4 16. Bg4 h6 17. Bxe7 Qxe7 18. Bxc8 Raxc8 19. Qg4 Kh7 20. Rad1 h5 {
0-1 (66) Stupica,J-Vukic,M Novi Travnik 1969}) 11... Nh6 {E92: King's Indian:
Classical: 6 Be2 e5:7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} 12.
b4 ({RR} 12. h4 f5 13. Nf1 fxe4 14. Nxe4 {[%eval 42,27]} (14. g4 $16 {[%eval
106,23]}) 14... Nhf5 15. h5 Nd4 16. hxg6 Nxg6 17. Bg5 Qe8 18. g3 {[%eval -17,
25]} (18. Ne3 $14 {[%eval 45,25]}) 18... Bf5 19. Nfd2 Qf7 {[%eval 29,24]} (
19... Qd7 $15 {[%eval -37,27]}) 20. Bd3 $2 {[%eval -337,25][%mdl 8192]} (20.
Bg4 $11 {[%eval 29,24] and White has nothing to worry.}) 20... Bxe4 $1 21. Nxe4
Nf3+ 22. Kf1 Nxg5 23. Qh5 h6 24. Rh2 Nxe4 25. Bxe4 Ne7 26. Qg4 Nf5 {Castaneda,
J (2161)-Terletsky,O (2195) chess.com INT 2021 0-1 (38)}) 12... f5 13. O-O ({RR
} 13. c5 a5 14. bxa5 dxc5 15. Nc4 fxe4 16. Be3 Nhf5 17. Bxc5 Nd4 18. O-O Nxd5
19. Nxd5 Qxd5 20. Bxf8 Bxf8 21. Ne3 Qxa5 22. Bc4+ Kh8 23. Qb1 b5 24. Bd5 c6 25.
Bxe4 Be6 26. Kh1 Bxa2 27. Qd1 {[%eval -47,23]} (27. Qb2 $11 {[%eval 17,36]} Qa3
28. Rfb1) 27... Qd8 {Aghamaliyev,C (2440)-Groszpeter,A (2520) Szekszard 1994 1/
2-1/2 (39)}) 13... f4 $146 {White is slightly better.} ({RR} 13... Kh8 14. a4
f4 15. a5 g5 16. f3 Rg8 17. c5 Bf8 18. h3 Ng6 19. Ba3 Nh4 20. Rf2 {[%eval 0,24]
} (20. c6 $14 {[%eval 60,24]}) 20... Rg7 21. a6 {[%eval -37,26]} (21. c6 $11 {
[%eval 22,29]}) 21... b6 22. Bb5 {[%eval -114,26]} (22. cxb6 $11 {[%eval 0,25]
remains equal.} cxb6 23. b5) 22... Rb8 {[%eval 0,26]} (22... bxc5 $17 {[%eval
-114,26]} 23. Nc4 Nxf3+ 24. Qxf3 g4 25. hxg4 Bxg4) 23. Bc6 $2 {[%eval -243,24]}
(23. Be2 $11 {[%eval 0,26] and White stays safe.}) 23... Bxa6 $2 {[%eval -25,
28]} ({Black should play} 23... g4 $19 {[%eval -243,24]} 24. cxb6 Rxb6 25. hxg4
Bxg4) 24. Qa4 {[%eval -82,28]} (24. cxd6 $11 {[%eval -25,28] keeps the balance.
} cxd6 25. b5) 24... Bb7 $2 {[%eval 76,24]} (24... g4 $17 {[%eval -82,28]
keeps the pressure on.} 25. fxg4 Bd3) 25. Bxb7 Rxb7 26. c6 Rb8 27. Qxa7 Ng8 28.
Nf1 {[%eval -25,33] Lobach,P-Kourek,J (2305) Pardubice 1992 0-1 (42)} (28. Bb2
$16 {[%eval 113,25]})) ({RR} 13... Nf7 14. f3 Bh6 15. Nb3 Bxc1 16. Rxc1 Kh8 17.
c5 f4 18. Rf2 Bd7 19. cxd6 {[%eval -7,28]} ({White should try} 19. b5 $14 {
[%eval 55,27]}) 19... cxd6 20. a4 Ng8 21. Bb5 Bc8 22. a5 Nf6 23. Rfc2 a6 {
[%eval -11,28]} (23... g5 $17 {[%eval -82,26]}) 24. Be2 b5 25. Nxb5 {[%eval
-138,26]} (25. Qd3 $11 {[%eval -4,28]}) 25... axb5 26. Bxb5 Bd7 $2 {[%eval 32,
24]} (26... Rb8 $17 {[%eval -136,22]} 27. Nd2 g5) 27. Bc6 Rb8 {[%eval 107,26] 
[#]} (27... g5 $14 {[%eval 35,30]}) 28. Rc4 $2 {[%eval -153,23][%mdl 8192] Pal,
P (2285)-Vigh,B (2360) Gyula 1996 0-1 (40)} (28. b5 $1 $16 {[%eval 107,26] is
necessary to keep the advantage.})) 14. c5 g5 15. f3 Rf7 16. a4 Bf8 17. Nc4 Rg7
18. h3 Nf7 19. Bb2 {[%eval -83,25]} (19. cxd6 $11 {[%eval 30,27]} cxd6 20. b5)
19... h5 20. Nb5 {[%eval -151,26]} (20. Kf2 $15 {[%eval -60,25]}) 20... Ng6 $17
21. c6 bxc6 22. dxc6 Be6 23. Na5 Nh4 24. Nb7 {[%eval -260,21]} (24. Bc4 $17 {
[%eval -147,27]} Bxc4 25. Nxc4) 24... Qe7 $19 25. Rf2 {[#]} g4 $1 {[%mdl 512]}
26. fxg4 hxg4 27. Bxg4 ({Much worse is} 27. hxg4 Nh6 $19) 27... Bxg4 28. hxg4
Nh6 29. Nc3 $2 {[%eval -469,25]} (29. Qb3+ {[%eval -280,25]} Kh7 30. Qh3) 29...
Nxg4 30. Nd5 Qg5 31. Qxg4 Qxg4 32. Nf6+ Kf7 33. Nxg4 Rxg4 34. Kf1 Be7 35. Bc3
Rh8 36. b5 Ke6 37. Raa2 Ng6 {aiming for ...Rh1+.} 38. Ba5 $2 {[%eval -543,23] 
[#]} (38. a5 {[%eval -322,27]}) 38... Rh1+ $1 39. Ke2 Bh4 40. Kd3 Bxf2 41. Rxf2
Rh7 42. Kc4 Nh4 43. Bxc7 Rxc7 44. Rd2 Nxg2 45. Rxd6+ Ke7 46. b6 axb6 {White
must now prevent ...f3.} 47. Kb5 f3 {...f2 is the strong threat.} 48. Kxb6 {[#]
} Rxc6+ $1 {[%mdl 576] Promotion} 49. Rxc6 {[%mdl 4096] Endgame KRN-KRN} (49.
Kxc6 f2) 49... f2 50. Rc7+ Kf8 51. Rc8+ Kg7 52. Rc7+ Kg6 53. Rc1 Ne1 54. a5
f1=Q 55. Rc6+ Kh5 56. Nc5 Nd3 {Accuracy: White = 35%, Black = 82%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "4"]
[White "Camara, Helder"]
[Black "Segal, Alexandru Sorin"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "24"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 g6 2. c4 Bg7 3. Nc3 d6 4. d4 Nf6 5. e4 O-O 6. Be2 e5 7. dxe5 dxe5 8.
Qxd8 Rxd8 9. Bg5 Re8 10. O-O-O h6 11. Bh4 Na6 12. Ne1 c6 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "4"]
[White "Ary, Edgar Nadra"]
[Black "Carvalho, Herbert Abreu"]
[Result "0-1"]
[ECO "B42"]
[BlackElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "126"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 {Kritz,L} c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5 6. Nb3 Ba7 ({RR} 
6... Be7 7. Qg4 g6 ({RR} 7... Nf6 8. Qxg7 Rg8 9. Qh6 Rxg2 10. Qh3 Rg8 11. Nc3)
8. Qe2 d6 9. Nc3 ({RR} 9. c4 Qc7 10. Nc3 b6) 9... Qc7 10. O-O Nd7 11. Bd2 b6
12. f4 Ngf6 13. Rae1 Bb7) 7. Qe2 ({RR} 7. Qg4 Nf6 ({RR} 7... g6 8. Qg3 Nc6 9.
Nc3 d6 10. h4 Nf6 11. Bh6 Ne5 12. Be2 b5 13. f4 Nc4 14. O-O-O Ne3 15. Rd4 Nfg4
16. Bxg4 Nxg4 17. Qxg4 Bxd4 18. Nxd4 b4 19. Na4 Bd7 20. b3 Bxa4 21. bxa4 Qd7
22. Kb1) 8. Qg3 d6 9. O-O ({RR} 9. Nc3 Nc6 10. Bg5 h6 11. Bd2 Nh5 ({RR} 11...
Ne5 12. O-O-O g5 13. Be2 b5 14. f4 gxf4 15. Bxf4 Rg8 16. Qh3 Qe7 17. a3) 12.
Qf3 Qh4 13. g3 Ne5 14. Qe2 Qg4 15. O-O-O Qxe2 16. Bxe2 Nf6 17. f4 Neg4 18. Be1
Ke7) 9... Nc6 10. Nc3 Ne5 11. Be2 O-O ({RR} 11... b5 12. Bf4 b4 13. Rad1 Qe7
14. Rxd6 Qxd6 ({RR} 14... Ng6 15. e5 bxc3 16. exf6 gxf6 ({RR} 16... Nxf4 17.
Qxf4 gxf6 18. Rfd1 cxb2 19. Qa4+ Kf8 20. Rd8+ Kg7 21. Qg4+ Kh6 22. R8d3) 17.
Bf3 Bb7 18. Na5 Bxf3 19. Qxf3) 15. Bxe5 Qe7 16. Bd6) 12. Kh1 b5 13. f4 Nc4 14.
e5 Ne8 15. a4 Bd7 16. axb5 axb5 17. Ne4 Bc6 18. Bd3 Bxe4 19. Bxe4 d5 20. Bd3 f5
21. c3 Nc7) ({RR} 7. O-O Nc6 8. Qg4 Nf6 9. Qxg7 Rg8 10. Qh6 Ne5 11. Nc3 b5 12.
Bf4 Neg4 13. Qh4 Nxf2 14. Rxf2 Rg4 15. Qh6 Bxf2+ 16. Kxf2 Ng8) 7... d6 ({RR} 
7... Nc6 8. Be3 d6 9. f4 ({RR} 9. N1d2 e5 10. f4 ({RR} 10. Bxa7 Rxa7 11. Nc4 b5
12. Ne3 Nf6 13. O-O-O Be6) 10... Nf6 11. O-O-O Bg4 12. Nf3 Bxe3+ 13. Qxe3 exf4
14. Qxf4 Qc7 15. h3 Be6 16. Nbd4 Nxd4 17. Nxd4 O-O) ({RR} 9. Nc3 Nf6 ({RR} 9...
Nge7 10. O-O O-O 11. f4 b5 12. a4 Bxe3+ ({RR} 12... b4 13. Nd1 Bxe3+ 14. Nxe3)
13. Qxe3 b4 14. Ne2) 10. O-O b5 11. a4 b4 ({RR} 11... Bxe3 12. axb5 Bd4 ({RR} 
12... Bxf2+ 13. Qxf2 Ne5 14. Qd4 Nxd3 15. Qxd3 Bb7 16. Na5) 13. Nd1 Qc7 14.
bxc6 Bb6 15. Ne3 O-O ({RR} 15... Qxc6 16. Nd5 Bd8 17. Na5 Qd7 18. Nxf6+ Bxf6
19. Nc4) 16. Nc4 Qxc6 17. Nxd6 Qxd6 18. e5 Qb8 19. exf6 gxf6 20. Qg4+ Kh8 21.
Qh4 f5 22. Rfe1) 12. Nd1 Bxe3 13. Nxe3) 9... Qc7 ({RR} 9... Nf6 10. Bxa7 Rxa7
11. c4 O-O 12. O-O b6 13. Nc3 Nd7 14. Rad1) 10. O-O Nf6 11. Bxa7 Rxa7 12. Nc3
b5 13. a4 b4 14. Nd1 a5 15. Ne3 O-O 16. Kh1 Bb7 17. Ng4 Nxg4 18. Qxg4 Raa8 19.
Rae1) 8. O-O ({RR} 8. Be3 Nf6 ({RR} 8... Bxe3 9. Qxe3 Nf6 10. f4 O-O 11. O-O)
9. Bxa7 Rxa7 10. c4 ({RR} 10. O-O Nc6 ({RR} 10... b5 11. a4) 11. f4 O-O 12. Nc3
b5 13. a4 b4 14. Nd1) 10... Nc6 11. Nc3 O-O 12. O-O b6 13. Qe3 Qc7 14. Be2 Qb8
15. Rfd1 Rd8 16. Rd2 e5 17. Rc1 Be6 18. Rcd1 h6 19. h3 Rb7 20. Bf1 b5 21. cxb5
axb5 22. Nd5 Bxd5 {Ivanchuk,V (2729)-Kamsky,G (2686) Wijk aan Zee 2006 CBM 111
[Kritz,L] 1-0 (54)}) 8... Nf6 9. Kh1 $146 ({RR} 9. Rd1 Nc6 10. a4 O-O 11. Bg5
h6 12. Bh4 g5 13. Bg3 e5 14. Kh1 Be6 15. Bc4 Qe7 16. Na3 Rad8 17. Bd5 Qc7 18.
Bxe6 fxe6 19. Nc4 Rd7 20. Rd2 Rc8 21. f3 Nd4 22. Nxd4 Bxd4 23. c3 Qxc4 {
Giaidzi,A (2060)-Maric,A (2400) Athens 1992 1/2-1/2 (61)}) ({RR} 9. c4 Nbd7 10.
Kh1 O-O 11. f4 e5 12. Nc3 exf4 13. Bxf4 Ne5 14. Bg5 Bg4 15. Qd2 Ned7 16. Nd5
Be6 17. Bh4 Bxd5 18. exd5 Re8 19. Rf5 Re5 20. Raf1 Rxf5 21. Rxf5 Qe8 22. Qf4
Ne5 23. Bxf6 Nxd3 {Cordoba Roa,A (2214)-Crispin Ferreras,D (2131) chess.com
INT 2023 0-1}) ({RR} 9. c4 Nc6 10. Be3 O-O 11. Bxa7 Rxa7 12. Nc3 b6 13. Rad1
Rd7 14. f4 Qc7 15. h3 Bb7 16. Qf2 Nb4 17. Qe3 Rfd8 18. a3 Nxd3 19. Qxd3 Ba8 20.
Nd4 Qb7 21. Rfe1 Rc8 22. Re2 Rcd8 23. Rc1 Qc7 {Zilahi,T (1836)-Bogar,P (2013)
Balatonlelle 2009 1/2-1/2}) 9... Nc6 10. f4 Qc7 11. Nc3 Bd7 12. Be3 Bxe3 13.
Qxe3 O-O-O 14. a4 d5 15. Nb5 axb5 16. axb5 Nb8 17. b6 Qd6 18. e5 d4 19. Qg1
Qxb6 20. exf6 Bc6 21. fxg7 Rhg8 22. Be2 Rxg7 23. Bf3 f6 24. Bxc6 Nxc6 25. Ra8+
Kc7 26. Rxd8 Kxd8 27. Nxd4 Nxd4 28. c3 Rd7 29. cxd4 Qxd4 30. Qxd4 Rxd4 31. Kg1
Kd7 32. g3 Kd6 33. Rf2 b5 34. Re2 Kd5 35. Kf2 e5 36. fxe5 fxe5 37. Rc2 Rb4 38.
Rd2+ Ke4 39. Ke2 Rb3 40. Rc2 h5 41. Rd2 Re3+ 42. Kf2 Rd3 43. Re2+ Kd4 44. h3 e4
45. Kg2 b4 46. g4 h4 47. Kh2 e3 48. Kg2 Ke4 49. Kf1 Kf3 50. Ke1 Rd8 51. Rc2 Ra8
52. Rc1 b3 53. Kf1 Rd8 54. Kg1 Rd2 55. Rf1+ Kg3 56. Rc1 Rxb2 57. g5 Kxh3 58.
Kh1 Rh2+ 59. Kg1 Rg2+ 60. Kh1 Rxg5 61. Rc3 Rg3 62. Rxb3 e2 {[%cal Re2e1]} 63.
Rb1 Rd3 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "4"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Filguth, Rubens Alberto"]
[Result "1-0"]
[ECO "C18"]
[WhiteElo "2375"]
[BlackElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "59"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 12,59,51,40,162,163,151,142,210,139,138,128,201,179,166,63,99,14,24,19,
19,22,54,0,0,0,50,0,4,0,193,203,193,171,172,110,123,49,600,601,590,583,569,555,
797,756,1942,1882,1613,1551]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+
6. bxc3 Ne7 7. h4 f6 $146 {[%eval 162,24] C18: French: 3 Nc3 Bb4: Main line: 7
h4 and 7 Qg4.} ({RR} 7... h6 {[%eval 102,26] 7...Qc7 0.40} 8. h5 {[%eval 43,25]
} (8. Qg4 $16 {[%eval 102,26]}) 8... Nd7 {[%eval 146,22]} (8... Qc7 $14 {
[%eval 43,25]}) 9. Qg4 $1 {[%cal Rg4g7]} Qa5 10. Bd2 $1 O-O 11. c4 $1 f5 12.
Qxg7+ Kxg7 13. Bxa5 b6 14. Bc3 {[%eval 79,28]} (14. Bd2 $18 {[%eval 161,25]
has better winning chances.}) 14... Ba6 15. Ne2 Kf7 16. cxd5 Nxd5 17. Bd2 Bxe2
$1 18. Bxe2 cxd4 19. Rh4 Rac8 20. Rxd4 Rxc2 21. Bxh6 Rg8 22. Kf1 {Inarkiev,E 
(2695)-Vallejo Pons,F (2693) Plovdiv 2012 1/2-1/2 (61)}) ({RR} 7... b6 8. Rh3
Qc7 9. a4 Ba6 10. Ba3 {[%eval -10,27]} ({White should try} 10. Bb5+ $14 {
[%eval 68,23]} Bxb5 11. axb5) 10... Bxf1 11. Kxf1 Nd7 12. Nf3 Rc8 13. Qd2 h6
14. Kg1 cxd4 15. Bxe7 {[%eval -95,25]} (15. Nxd4 $11 {[%eval 11,28]} Nc5 16.
Re1) 15... dxc3 16. Qd4 {[%eval -200,28]} (16. Qf4 $17 {[%eval -86,29]} Kxe7
17. Rg3) 16... Kxe7 17. Rg3 {[%eval -286,24]} (17. Qf4 {[%eval -177,27] was
worth a try.}) 17... Rhg8 {[%eval -143,27]} (17... Qc4 $1 $19 {[%eval -286,24]}
18. Rg4 Qxd4 19. Rxd4 Rc5) 18. Ra3 $2 {[%eval -458,26][%mdl 8192]} (18. Qe3 $17
{[%eval -143,27] is tougher.}) 18... Qc5 19. Qxc5+ Rxc5 20. Rb3 g6 21. Kf1 Rgc8
22. Ke2 {Berago,J-Sviridova,V (2144) lichess.org INT 2022 0-1 (49)}) (7... Qc7
$14 {[%eval 40,25]}) ({Predecessor:} 7... Nbc6 8. h5 Qc7 9. Nf3 Bd7 10. h6 gxh6
11. Be2 Rg8 12. Kf1 Nf5 13. Nh4 Qa5 14. Nxf5 exf5 15. Rb1 Qxc3 16. dxc5 O-O-O
17. Bb2 Qxc5 18. Rh3 d4 {1/2-1/2 (18) Rantanen,Y (2410)-Farago,I (2420)
Gausdal 1976}) 8. exf6 $18 ({RR} 8. Qg4 {[%eval 4,28] 8.exf6 1.49} Nf5 {
[%eval 75,24]} (8... O-O $1 $11 {[%eval 4,28]}) 9. Bd3 O-O 10. exf6 Qxf6 11.
Nf3 Nc6 12. Qg5 e5 13. dxe5 Nxe5 14. Qxf6 Nxf3+ 15. gxf3 Rxf6 16. Bxf5 {
[%eval -77,24]} (16. Bf4 $11 {[%eval -11,33] remains equal.}) 16... Bxf5 17.
Bg5 Re6+ 18. Kd2 Rae8 19. Rhe1 Rxe1 20. Rxe1 Rxe1 21. Kxe1 Bxc2 22. Kd2 Bf5 {
Van Gool,R (2106)-Driessens,P (2214) Heerlen 1999 1/2-1/2 (48)}) (8. dxc5 fxe5
9. Qh5+ Ng6 $11) 8... gxf6 9. Qh5+ (9. dxc5 $6 O-O $11) 9... Ng6 {[%eval 210,
22]} (9... Kd7 $16 {[%eval 142,26] is a better defense.}) 10. Qh6 Kf7 11. h5 (
11. dxc5 $6 Nd7 $14) 11... Nf8 {[%eval 201,26]} (11... Ne7 $16 {[%eval 128,26]}
) 12. Rh3 (12. dxc5 $6 e5 $16) 12... Nc6 13. Bd3 {[%eval 63,31]} (13. dxc5 $6
Nd7 $14) (13. Rg3 $6 Rg8 $14) (13. Rf3 $18 {[%eval 166,22]}) 13... Rg8 14. Bxh7
{[%eval 14,30]} (14. dxc5 e5 $15) (14. Nf3 $16 {[%eval 99,24]}) 14... Nxh7 $11
15. Qxh7+ Rg7 16. Qd3 {h6 is the strong threat.} Rxg2 17. Nf3 (17. Kf1 $5 {
[%cal Rf1g2]} Rg8 18. h6 $14 (18. dxc5 e5 $11)) 17... e5 18. Qh7+ $1 Ke8 (18...
Rg7 $5 19. Ng5+ $8 Kf8 20. Ne6+ (20. Qh8+ Rg8 $17) 20... Bxe6 $11) 19. Rg3 Rxg3
20. fxg3 {Hoping for dxe5.} exd4 $2 {[%eval 193,26] [#]} (20... Qe7 $1 $11 {
[%eval 0,27] and Black has nothing to worry.} 21. Qg8+ Qf8 22. Qxd5 cxd4) 21.
Qg6+ $1 $18 Ke7 22. Qg7+ $40 {[%mdl 128] White has strong attack.} Ke8 {
Threatening ...Qe7+.} 23. Kf2 {[%eval 110,26]} (23. Qg6+ $18 {[%eval 172,25]}
Ke7 24. h6) 23... Be6 $16 {[#]} 24. Bh6 {[%eval 49,25]} ({But not} 24. Qxb7 Rc8
$14) (24. cxd4 $1 $16 {[%eval 123,26] Black must now prevent Rb1.} Nxd4 25. Bb2
Nxf3 26. Bxf6 (26. Kxf3 Qe7 $14)) 24... Ne5 $2 {[%eval 600,27][%mdl 8192]} (
24... Rc8 $14 {[%eval 49,25]}) 25. Nxe5 $18 {White is clearly winning.} fxe5
26. Kg1 Rc8 27. Qxe5 Qb6 28. Re1 Rc6 29. Bg5 {Qh8+ would kill now.} Rd6 30. Qg7
{Accuracy: White = 59%, Black = 50%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "4"]
[White "Pimenta, Jeronimo Marques"]
[Black "Trois, Francisco R Torres"]
[Result "0-1"]
[ECO "E94"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "92"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 18,92,33,41,60,60,69,45,146,130,119,117,204,140,142,120,128,130,140,124,
196,198,328,326,305,4,4,0,17,14,60,7,11,11,13,8,14,7,8,10,58,56,120,24,18,0,0,
0,484,485,481,487,481,-200,-193,-607,-569,-680,-687,-646,-569,-537,0,0,0,0,0,0,
0,-29993,-29994,-29994,-29995,-29995,-29996,-29996,-29997]} 1. d4 g6 2. c4 Bg7
3. Nc3 d6 4. Nf3 Nd7 5. e4 e5 6. Be2 Ngf6 7. O-O O-O 8. dxe5 dxe5 9. Qc2 c6 10.
b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} a5 {E94: King's Indian: Classical: 6 Be2 e5 7
0-0: Various Black 7th moves.} ({RR} 10... Re8 11. Be3 Ng4 12. Bg5 f6 13. Bc1
Nh6 14. Rd1 Qc7 15. c5 a5 16. b5 {[%eval 13,28]} (16. Na4 $16 {[%eval 107,30]})
16... Nxc5 17. Ba3 Bf8 $1 18. Bxc5 Bxc5 19. Na4 Bf8 20. Nd2 Nf7 21. b6 Qe7 22.
Nb3 {[%eval -139,31]} (22. Bc4 $15 {[%eval -52,27]}) 22... Qb4 $2 {[%eval 43,
30]} (22... Kh8 $17 {[%eval -139,31]} 23. Nbc5 f5) 23. Nd2 $2 {[%eval -120,31]}
(23. Nbc5 $14 {[%eval 43,30] was forced to keep a grip.} Bxc5 24. Nxc5 Qxb6 25.
Rab1) 23... Qe7 {[%eval -62,25]} (23... Kh8 $17 {[%eval -120,31]} 24. Bc4 Qe7
25. Bxf7 Qxf7) 24. Nb3 {[%eval -131,29]} (24. Bc4 $15 {[%eval -62,25]}) 24...
Qb4 $2 {[%eval 39,32]} (24... Kh8 $17 {[%eval -131,29]} 25. Nbc5 f5) 25. Nd2 {
[%eval -102,30] Maghsoodloo,P (2701)-Markus,R (2627) Belgrade SRB 2022 1/2-1/2}
(25. Nbc5 $14 {[%eval 39,32] is the one way to stay ahead.} Bxc5 26. Nxc5 Qxb6
27. Rab1)) ({RR} 10... Qc7 11. Rd1 Re8 12. Bb2 Nf8 13. c5 Nh5 14. Rd6 {[%eval
-8,26]} (14. g3 $14 {[%eval 52,30]}) 14... Bg4 15. Nd1 Nf4 16. Ne3 Nxe2+ 17.
Qxe2 Bxf3 18. Qxf3 Qe7 19. Nc4 Red8 20. Rad1 Rxd6 21. Rxd6 Re8 22. Qd1 h5 23.
Rd3 {[%eval 0,29]} (23. g3 $16 {[%eval 104,27]}) 23... Qe6 {[%eval 71,27]} (
23... b6 $11 {[%eval 0,29] keeps the balance.}) 24. Nd6 Re7 25. Qb3 {Pimenta,
J-Toth,P Rio de Janeiro 1980 1/2-1/2 (38)}) 11. b5 Re8 12. Rd1 Nh5 $146 {
[%eval 146,27]} ({RR} 12... Qc7 13. Rb1 Nb6 $2 {[%eval 192,27]} (13... a4 $11 {
[%eval 20,28]}) 14. c5 Nbd7 15. b6 {[%eval 115,26]} ({White should play} 15.
Na4 $18 {[%eval 194,23]}) 15... Qd8 16. Ba3 Qe7 17. Rd6 Nf8 18. h3 Nh5 19. Bc4
Be6 20. Ne2 Kh8 {[%eval 157,28]} (20... Bxc4 $142 {[%eval 74,27]} 21. Qxc4 Red8
) 21. Rbd1 Rad8 22. Bxe6 Nxe6 23. Qc3 Nd4 {[%eval 178,24]} (23... Kg8 $16 {
[%eval 105,26] might work better.}) 24. Qd3 {[%eval 117,28]} (24. Nexd4 $18 {
[%eval 178,24]} exd4 25. Qe1) 24... Rxd6 {[%eval 182,30]} (24... Nxf3+ $16 {
[%eval 117,28]} 25. Qxf3 Kg8) 25. cxd6 Qe6 $2 {[%eval 423,30]} (25... Nxe2+ {
[%eval 174,25]} 26. Qxe2 Qd7) 26. Nexd4 exd4 27. Nxd4 {Vollak,M (1858)
-Nekrasova,K (1784) Willingen 2008 1-0 (41)}) ({RR} 12... Qc7 13. Ba3 Bf8 $1
14. Bxf8 Kxf8 15. Qd2 Nc5 16. Qe3 Qe7 $1 17. h3 Kg7 18. Rd2 Nfd7 19. g4 {
[%eval 0,36]} (19. Rad1 $14 {[%eval 64,20]}) 19... Nf8 {[%eval 91,26]} (19...
h6 $11 {[%eval 0,36] remains equal.}) 20. Rad1 f6 {[%eval 204,26]} (20... Nfe6
$16 {[%eval 100,30] is a better defense.}) 21. Rd6 Nfe6 22. bxc6 {[%eval 128,
31]} (22. g5 $18 {[%eval 191,26]}) 22... bxc6 23. Rxc6 Bb7 {[%eval 209,26]} (
23... Bd7 $16 {[%eval 151,31]} 24. Rb6 h6) 24. Nd5 Qf8 25. Rb6 g5 26. Rb5 $2 {
[%eval 61,28]} ({Better is} 26. Rdb1 $18 {[%eval 221,25]}) 26... Bc6 27. Rb6 {
Podrez,S (1998)-Krupko,A (2177) Myrhorod 2010 0-1 (41)}) (12... Qc7 $14 {
[%eval 45,30]}) 13. c5 $146 ({Predecessor:} 13. Qa4 Qf6 14. Bg5 Qe6 15. Be3 Nf4
16. Bf1 Bf8 17. Rd2 Nc5 18. Qc2 Qf6 19. Na4 Nxe4 20. Nb6 Nxd2 21. Qxd2 Bb4 22.
Qb2 Rb8 {0-1 (22) Otto,A-Schlieder,R Soemmerda 1950}) 13... Nf4 14. Bc4 Bf8 {
[%eval 204,23]} (14... Qe7 $16 {[%eval 117,28]}) 15. Ne2 Nxe2+ 16. Bxe2 Qe7 17.
Be3 Nxc5 18. Rac1 {[%cal Re3c5]} b6 {[%eval 196,23]} (18... Ne6 $16 {[%eval
124,29] keeps fighting.}) 19. bxc6 $18 Ba6 {[%eval 328,22]} (19... Bg4 {
[%eval 198,29] was necessary.} 20. Rb1 Rab8) 20. Bxa6 $1 Rxa6 21. Bxc5 $2 {
[%eval 4,30]} ({White should try} 21. Qb2 $18 {[%eval 305,26]}) 21... bxc5 $11
22. Rd7 Qf6 23. c7 Rc6 24. Qb3 Re7 25. Rd8 Rcxc7 26. Qb8 Qg7 27. Rcd1 Rb7 28.
Qa8 Ra7 29. Qd5 {[%mdl 1024] Threatens to win with Rb1. White has compensation.
} Rac7 {[%eval 120,26]} (29... c4 $1 $14 {[%eval 56,25]}) 30. Rb1 {[%eval 24,
33]} (30. Nd2 $16 {[%eval 120,26]}) 30... c4 31. Rbb8 {aiming for Qa8.} c3 $1 {
[%cal Rc3c2] And now ...c2 would win.} 32. Qa8 {[%cal Rd8f8]} (32. Rxf8+ $2
Qxf8 33. Rxf8+ Kxf8 $19) 32... Qf6 $2 {[%eval 484,27][%mdl 8192]} (32... c2 $1
$11 {[%eval 0,33]} 33. Rxf8+ Qxf8 34. Rxf8+ Kg7 35. Rg8+ Kf6 36. Rxg6+ (36.
Qa6+ $2 Re6 $19) 36... fxg6 37. Qf8+ Ke6 38. Qg8+ Kf6 39. Qh8+ Ke6 40. Qxe5+ {
[%mdl 64] Double Attack} Kd7 41. Qd4+ Ke8 42. Qh8+ Kd7 43. Qd4+ Ke8 44. Qh8+
Kd7 45. Qd4+) 33. Rxf8+ $18 Kg7 {White must now prevent ...c2.} 34. Rg8+ $1 Kh6
35. Rb1 $4 {[%eval -200,31][%mdl 8192]} (35. Rb6 $1 $18 {[%eval 481,30] was
the only winning move.} Qf4 36. h3 Qc1+ 37. Kh2 Qf4+ 38. Kh1 Qc1+ 39. Ng1)
35... c2 $40 {[%mdl 128] White is in trouble.} 36. Qf8+ $2 {[%eval -607,30]} (
36. Rf1 {[%eval -193,29]} c1=Q 37. h3 Qxf3 38. gxf3 Qg5+ 39. Kh2) 36... Kh5 37.
Rc1 Qf4 {[%mdl 64] Double Attack} 38. g3 Qxc1+ 39. Kg2 {h3 would kill now.} Qd1
$2 {[%eval 0,55]} (39... Qf4 $1 $19 {[%eval -537,27][%cal Rf4e4]} 40. gxf4 c1=Q
) 40. Rh8 $1 $11 {[%cal Rh8h7] [#]} Qxf3+ $1 {[%mdl 576] Promotion} 41. Kxf3
c1=Q ({Inferior is} 41... f5 42. Qf6 g5 43. exf5 Re6 44. Qxe6 e4+ 45. Kg2 Rg7
46. h3 c1=Q 47. Rxh7+ $1 {[%mdl 576] Remove Defender, Deflection} Rxh7 48. Qg6#
) 42. Rxh7+ Kg5 {[#] ( -> ...Qh1+)} 43. Qh8 $2 {[%eval -32753,47][%mdl 8192]} (
43. Rh5+ $3 $11 {[%eval 0,31][%mdl 512]} Kxh5 44. Qh8+ Qh6 45. Qf6) 43... Qh1+
{Black mates.} 44. Ke3 Rc3+ 45. Kd2 Rd7+ 46. Kxc3 Qc1+ {Accuracy: White = 57%,
Black = 55%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "4"]
[White "Masculo, Jose Soares"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "E18"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "46"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. g3 Nf6 2. Bg2 d5 3. Nf3 e6 4. O-O Be7 5. c4 O-O 6. d4 b6 7. Nc3 Bb7 8. Ne5
Na6 9. Qa4 Qe8 10. Qxe8 Rfxe8 11. cxd5 exd5 12. Bg5 Ne4 13. Bxe7 Rxe7 14. e3 ({
RR} 14. Bxe4 dxe4 15. Nc4 Rd8 16. Rfd1 Red7 17. e3 f6 18. a3 Bd5 19. Nxd5 Rxd5
20. Rd2 Kf7 21. Rad1 c6 22. f3 exf3 23. e4 R5d7 24. Kf2 Nc7 25. Kxf3 Ne8 26.
Ke3 Nc7 27. Kf3 Ke6 28. Ne3 g6 {Fiorenza,B (1851)-Campos,M (2219) Buenos Aires
ARG 2023 1-0 (69)}) 14... c5 15. Rac1 ({RR} 15. Rfc1 cxd4 16. exd4 Nc7 17. a4
Ne6 18. Nf3 Rc8 {1/2-1/2 (18) Andersson,U (2565)-Balashov,Y (2565) Tilburg 1977
}) 15... Nxc3 16. bxc3 $146 ({RR} 16. Rxc3 c4 17. b3 f6 18. Nf3 b5 19. bxc4
bxc4 20. Rb1 Rb8 21. Nd2 f5 22. Rxb7 Rexb7 23. Bxd5+ Kf8 24. Bxb7 Rxb7 25. Rxc4
Rb2 26. Rc8+ Ke7 27. Ra8 Nb4 28. Rxa7+ Ke6 29. Rb7 Rxa2 30. Rxb4 Rxd2 {
Vainshtein,V (2321)-Khmelniker,I (2225) Tel Aviv 2002 1-0 (34)}) 16... c4 17.
Nf3 Nc7 18. a4 Ne8 19. Ne1 Nf6 20. Nc2 Rd8 21. Nb4 a5 22. Nc2 Bc6 23. Ra1 Rb8
1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "5"]
[White "Filguth, Rubens Alberto"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "C69"]
[WhiteElo "2350"]
[BlackElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "80"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 6. d4 exd4 7. Nxd4 c5 8.
Nb3 Qxd1 9. Rxd1 Bd6 10. Nc3 Bg4 11. f3 Be6 12. Be3 b6 13. a4 O-O-O 14. a5 Kb7
15. axb6 cxb6 16. e5 Bxb3 17. Ne4 Bc7 18. Rxd8 Bxd8 19. Nd6+ Kc6 20. cxb3 Ne7
21. Rxa6 Nd5 22. Bd2 $146 ({RR} 22. Kf2 Bc7 23. Ra7 fxe5 24. Nf7 Re8 25. Ng5 h6
26. Ne4 Rd8 27. Bd2 Nf4 28. Bc3 Nd3+ 29. Ke3 Nc1 30. Nd2 Rd7 31. b4 Rd3+ 32.
Kf2 cxb4 33. Bxb4 Bd6 34. Nc4 Bxb4 35. Nxe5+ Kd5 36. Nxd3 Nxd3+ {Topalovic,Z 
(2223)-Jurkovic,H (2386) Kastav 2002 0-1 (50)}) 22... Bc7 23. Nc4 fxe5 24. Kf2
Re8 25. Ra1 e4 26. Re1 b5 27. fxe4 Nf6 28. e5 Ng4+ 29. Kg3 Nxe5 30. Nxe5+ Rxe5
31. Kf2 Rxe1 32. Bxe1 b4 33. h3 Be5 34. Ke3 Kd5 35. Kd3 Bxb2 36. Bg3 Be5 37.
Bf2 Bd4 38. Bg3 Bf6 39. Bf4 h5 40. Be3 Be5 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "5"]
[White "Segal, Alexandru Sorin"]
[Black "Sunye Neto, Jaime"]
[Result "1-0"]
[ECO "A46"]
[BlackElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "119"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 10,119,27,0,0,-7,20,-23,-5,-92,-96,-117,-117,-150,-21,-17,-16,-25,-28,
-32,-33,-38,-25,-57,-23,-110,-80,-107,-70,-104,-99,-107,-105,-103,-76,-132,-59,
-94,-63,-70,-39,-35,-33,-40,-36,-66,4,-50,82,82,157,159,246,247,257,232,320,
276,292,298,316,312,313,225,255,0,3,3,3,3,3,3,3,3,3,3,6,6,30,0,0,0,0,1,1,1,3,4,
374,432,421,352,545,545,489,407,9605,9605,3941,3965,9605,9605,20000,20000,
20000,20000,20000,20000,20000,20000,20000,9605]} 1. d4 Nf6 2. Nf3 e6 3. g3 b5
4. Bg2 Bb7 5. O-O Be7 6. Nbd2 O-O {A46:1 d4 Nf6 2 Nf3 e6: Torre, London and
Colle Systems.} 7. c3 ({RR} 7. Re1 c5 8. e4 cxd4 9. Nxd4 a6 10. e5 Nd5 {
[%eval 107,26]} (10... Bxg2 $11 {[%eval -13,27]} 11. Kxg2 Nd5) 11. Ne4 {
[%eval 3,28]} (11. c4 $16 {[%eval 107,26]} bxc4 12. Nxc4) 11... Nc6 12. Nxc6
Bxc6 13. h4 Qc7 14. Bg5 Qxe5 15. Nf6+ $1 Bxf6 16. Rxe5 Bxe5 17. c3 Rac8 18. Qe2
Bb8 19. h5 h6 20. Bd2 (20. Be3 $5) 20... f5 $1 21. a4 {[%eval -116,26]} (21.
Bf3 $11 {[%eval 7,32]}) 21... bxa4 $2 {[%eval 55,30] Bogner,S (2577)-Buhmann,R
(2580) lichess.org INT 2021 0-1} ({Black should try} 21... f4 $1 $17 {[%eval
-116,26]} 22. gxf4 Bxf4)) ({RR} 7. Re1 d5 8. a4 b4 9. Ne5 c5 10. c3 bxc3 11.
bxc3 Nc6 12. Nxc6 Bxc6 13. a5 Rb8 14. Nf3 Ne4 15. Bf4 Rc8 16. Qb3 g5 17. Be3 c4
18. Qc2 f6 19. Nd2 Nd6 20. f3 Be8 21. Bf2 Bg6 {Shuvalova,P (2496)-Demchenko,A 
(2619) chess.com INT 2023 0-1 (72)}) 7... d5 $146 ({Predecessor:} 7... c5 8. a4
a6 9. axb5 axb5 10. Rxa8 Bxa8 11. dxc5 Bxc5 12. Nb3 Be7 13. Nbd4 Qa5 14. b4 {
0-1 (40) Cukic,R (2355)-Barlov,D (2205) Kragujevac 1977}) 8. Qc2 Nbd7 $146 {
Black has an edge.} ({RR} 8... c5 9. dxc5 Bxc5 10. Nb3 Bb6 11. Bg5 Nbd7 12.
Nfd4 a6 13. h3 h6 14. Be3 Rc8 15. Qd1 Ne5 16. Nc2 {[%eval -197,27]} (16. Nd2
$17 {[%eval -103,28]}) 16... Nc4 $1 17. Bxb6 Qxb6 18. Rb1 Ne4 19. Bxe4 dxe4 20.
e3 Rcd8 21. Qe2 e5 22. Rfd1 Bc8 23. h4 {Adibekian,R (2212)-Tchetchelnitski,B 
(2169) Sottrum 2005 0-1 (46)}) 9. e4 {[%eval -92,25]} (9. Qd3 $11 {[%eval -5,
30]}) 9... Nxe4 $17 10. Nxe4 dxe4 11. Nd2 c5 {[%eval -21,33]} (11... f5 $17 {
[%eval -150,24] next ...c5 is good for Black.} 12. Rd1 Rb8) 12. Nxe4 $11 cxd4
13. cxd4 Rc8 14. Qe2 Bd5 $36 {[%mdl 2048] White must now prevent ...Bc4. White
is under pressure.} 15. Rd1 Qb6 16. Be3 Qb7 (16... Qc6 $5 {[%cal Rd5e4]} 17.
Rac1 Qa8 18. Qxb5 Nb6 $11) 17. f3 {[%eval -110,27]} (17. Bf4 $11 {[%eval -23,
31] remains equal.}) 17... Qb6 18. Qf2 Rc6 19. Bf1 b4 20. Bd3 Rfc8 21. Nd2 Qb7
22. Rf1 {[%eval -132,25]} (22. b3 $142 {[%eval -76,29]}) 22... Nf6 {[%eval -59,
29]} ({Black should play} 22... a5 $17 {[%eval -132,25]} 23. Rfd1 Nf6) 23. Qe2
Ne8 24. Ne4 Nc7 25. Nc5 Qa8 26. Rac1 a5 27. Bb1 f5 {[%eval 4,29]} ({Better is} 
27... Ne8 $15 {[%eval -66,23]}) 28. Bf4 Ne8 {[%eval 82,27]} (28... Bf6 $15 {
[%eval -50,24] keeps the upper hand.} 29. Be3 Na6) 29. Bxf5 $1 $16 {[%mdl 64]
Pin} Bxc5 {[%eval 157,29]} (29... exf5 $142 {[%eval 82,29]} 30. Qxe7 Nf6) 30.
Rxc5 exf5 {[%eval 246,27]} (30... Nf6 $16 {[%eval 159,30]}) 31. Rxd5 $18 Nf6
32. Rxf5 Qb7 33. Bg5 ({But not} 33. Rxa5 $6 Qb6 $18) 33... Qd7 34. Qd3 $1 (34.
Rxa5 $6 Rc2 $16) 34... Nd5 35. Re5 h6 36. Bd2 Rc2 37. Qb3 $2 {[%eval 0,45]} (
37. Rfe1 $1 $18 {[%eval 255,25]} R2c6 38. a3) 37... Rxd2 38. Rxd5 Qf7 {Hoping
for ...a4.} 39. Rc5 ({Don't play} 39. Rxa5 Qxb3 40. axb3 Rcc2 $15) 39... Rxc5
40. dxc5 {Rc1 is the strong threat.} Qxb3 41. axb3 $11 {[%mdl 4096] Endgame
And now Rc1 would win. KR-KR} Rc2 42. Rf2 Rxc5 43. Rd2 Kf7 44. h4 Ke6 45. Kf2
h5 46. g4 hxg4 47. fxg4 Rc1 48. Kg3 Ke5 $2 {[%eval 374,31][%mdl 8192] [#]} (
48... Rb1 $11 {[%eval 4,40] and Black is okay.}) 49. h5 $1 $18 Re1 50. Rf2 Re3+
{[%eval 545,26]} (50... Ke6 $142 {[%eval 352,30]} 51. Rf5 Re3+ 52. Kh4 Rxb3)
51. Rf3 Re2 52. g5 Rxb2 {[%eval 9605,28]} (52... Re1 $142 {[%eval 407,33]} 53.
Kf2 Rc1) 53. h6 {White is clearly winning.} gxh6 {[#]} 54. g6 $1 {[%cal Rg6g7]}
({Not} 54. gxh6 Rb1 $14) 54... Rb1 55. Kh2 Ke4 56. Rg3 Rd1 57. g7 Rd8 58. g8=Q
Rxg8 59. Rxg8 Kd3 60. Rc8 {Accuracy: White = 64%, Black = 46%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "5"]
[White "Carvalho, Herbert Abreu"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[ECO "D73"]
[WhiteElo "2265"]
[BlackElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "18"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. c4 c6 6. cxd5 cxd5 7. O-O Nc6 ({RR} 
7... Ne4 8. Ne5 Nd7 9. Nxd7 Bxd7 10. Nc3 Nxc3 11. bxc3 Bc6 12. Re1 O-O 13. e4
dxe4 14. Bxe4 Bxe4 15. Rxe4 Qd7 16. Qe2 e6 17. h4 Rac8 18. Bd2 h5 19. a4 Rc6
20. a5 Rfc8 21. Rb1 Rc4 22. Be1 {Sargissian,G (2689)-Nepomniachtchi,I (2767)
Moscow RUS 2019 0-1 (41)}) 8. Ne5 Nxe5 ({RR} 8... Bd7 9. Nc3 e6 10. Nxd7 Qxd7
11. e3 O-O 12. Qe2 Rac8 13. Bd2 Ne8 14. Rfc1 Nd6 15. Be1 Rc7 16. Qd1 Rfc8 17.
Ne2 Bf8 18. Nf4 h5 19. Nd3 Bh6 20. Rc2 Qe7 21. Rac1 Nc4 22. Nf4 Bxf4 23. gxf4 {
Meier,G (2628)-Robson,R (2699) chess.com INT 2023 1/2-1/2 (62)}) 9. dxe5 Ng4
$146 ({RR} 9... Ne4 10. Nd2 Nxd2 11. Qxd2 Be6 12. Rd1 Bxe5 13. Bxd5 Bxd5 14.
Qxd5 Qxd5 15. Rxd5 Bf6 16. Be3 b6 17. Rd2 O-O 18. Rc1 Kg7 19. b3 Rac8 20. Rxc8
Rxc8 21. Rd7 Ra8 22. Rb7 Kf8 23. Bf4 Ke8 {1/2-1/2 (23) Vormum,W-Naegler,M
Germany North 1982}) 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "5"]
[White "Rocha, Antonio Cavilhas"]
[Black "Pimenta, Jeronimo Marques"]
[Result "1/2-1/2"]
[ECO "E62"]
[WhiteElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "95"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 e5 8. d5
Ne7 9. e4 Nd7 10. b4 a5 11. bxa5 Rxa5 12. Nd2 f5 13. Nb3 Ra6 14. f3 $146 ({RR} 
14. a4 Nf6 15. exf5 Nxf5 16. c5 Re8 17. Re1 Nd4 18. cxd6 Qxd6 19. Nxd4 exd4 20.
Nb5 Rxe1+ 21. Qxe1 Qd8 22. Bf4 c6 23. Nc7 Rb6 24. a5 Rb2 25. dxc6 Nh5 26. cxb7
Bxb7 27. Ne6 Qe8 28. Bxb7 Rxb7 {Casafus,R (2400)-Langier,D (2300) Buenos Aires
1992 1-0 (33)}) 14... f4 15. g4 g5 16. a4 h5 17. h3 Rf7 18. Rf2 hxg4 19. hxg4
Ng6 20. Bf1 Nc5 21. Nxc5 dxc5 22. Rh2 Nh4 23. Bd2 Rh6 24. Be1 Bf6 25. Bxh4 gxh4
26. Bh3 Rg6 27. Rb2 Be7 28. Kh1 Kh7 29. Qd3 Qg8 30. Nd1 Ra6 31. Nf2 Qe8 32. a5
b6 33. Rba2 bxa5 34. Rxa5 Rxa5 35. Rxa5 Bd7 36. Qc3 Bd6 37. Nd3 Qb8 38. Nxc5
Qb1+ 39. Kg2 Bxc5 40. Rxc5 Qa2+ 41. Kg1 Qb1+ 42. Bf1 Qb6 43. Qa5 Qb3 44. Qe1
Qxf3 45. Qxh4+ Kg8 46. Qd8+ Kh7 47. Qh4+ Kg8 48. Qd8+ 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "5"]
[White "Trois, Francisco R Torres"]
[Black "Ary, Edgar Nadra"]
[Result "1-0"]
[ECO "E41"]
[WhiteElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "95"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 18,95,19,18,32,-10,76,-17,-17,-56,-37,-81,-46,-97,84,74,70,76,136,135,
141,144,150,135,144,132,122,97,101,99,105,71,421,258,308,249,203,120,236,214,
382,367,443,425,428,404,428,420,420,410,400,375,394,343,384,367,373,317,429,
402,484,451,485,448,502,522,519,473,576,585,585,574,589,568,605,600,576,574,
29983,29968]} 1. d4 {htt@s://lichess.org/î/LinuxBrickie} Nf6 2. c4 e6 3. Nc3
Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. e4 e5 9. d5 Ne7 10. Nd2 Ng6
{E41: Nimzo-Indian: Rubinstein: 4...c5 5 Bd3, including Hübner Variation.} ({
RR} 10... Bd7 11. Nf1 Qa5 12. Bd2 O-O-O 13. h4 h5 14. Rb1 Kb8 15. Qb3 {[%csl
Gb1][%cal Rb3b7]} Qc7 16. Ng3 Rdf8 17. Qd1 Bc8 18. Bg5 Ng4 19. Be2 f6 20. Bd2
g6 21. O-O f5 {[%eval -33,28]} (21... g5 $17 {[%eval -108,28]}) 22. f4 $1 fxe4
23. Bxg4 Bxg4 24. Qb3 e3 (24... Nf5 $5 {[%cal Rf5g3]} 25. Nxe4 Be2 $11) 25.
Bxe3 {Mag@soodloo,P (2707)-Vitiugov,N (2711) Villa Marina, Douglas, Isle o
2023 [https://lichess.org/î/LinuxBrickie] 1-0 (37)}) 11. Nf1 ({RR} 11. h4 Bd7
12. g3 Qa5 13. Qb3 Ba4 {[%eval 109,25]} (13... O-O-O $11 {[%eval 17,27]}) 14.
Qxb7 O-O 15. Qb2 $1 Rfb8 16. Qa3 Rb6 17. O-O Nf8 18. Nf3 N8d7 19. Bg5 h6 20.
Bxf6 {[%eval 16,33]} (20. Bd2 $16 {[%eval 97,27]}) 20... Nxf6 21. Rfb1 Ra6 22.
Nd2 Bd7 {[%eval 90,26]} (22... g6 $11 {[%eval 12,32] keeps the balance.}) 23.
Qxa5 Rxa5 24. Rb3 Kf8 25. Kf1 Ke7 {Li,C (2744)-Rapport,R (2675) Tbilisi 2017 1/
2-1/2 (54)}) 11... O-O {[%eval 76,27]} (11... Qa5 $11 {[%eval -10,33]} 12. Qc2
Rb8) 12. Ng3 $146 {[%eval -17,23]} ({RR} 12. g3 Bh3 13. Ne3 Qd7 14. f3 Rae8 15.
Rg1 Nh5 16. g4 Nhf4 17. Bc2 Qd8 18. Rg3 Nh4 19. Ba4 Qa5 {[%eval 185,25]} (19...
Re7 $16 {[%eval 92,27]}) 20. Bxe8 Qxc3+ 21. Bd2 Qd4 22. Ba4 Nd3+ 23. Ke2 Ng6 {
[%cal Rg6f4]} 24. Rxh3 Ngf4+ 25. Kf1 Nb2 26. Qc2 {[%eval 60,28]} ({Only move:} 
26. Qe1 $1 $18 {[%eval 195,28]}) 26... Nxa4 $4 {[%eval 378,29][%mdl 8192]
Juhnke,K-Breyther,R Germany North 1979 1-0 (40)} (26... Nxh3 $14 {[%eval 60,28]
} 27. Rd1 g6)) ({RR} 12. Ne3 Nf4 13. Bc2 h6 14. O-O {[%eval 25,30]} (14. f3 $16
{[%eval 92,26]}) 14... b6 15. Kh1 Rb8 16. g3 Ng6 17. Nf5 Re8 18. f4 $2 {
[%eval -303,25][%mdl 8192]} (18. Rg1 $16 {[%eval 84,27]}) 18... exf4 19. Qf3
Bxf5 20. exf5 Ne5 21. Qxf4 b5 22. cxb5 Nxd5 23. Qd2 Nf6 24. Qg2 d5 {[%eval
-128,27]} (24... Qa5 $19 {[%eval -198,23]} 25. a4 Qxc3) 25. Bf4 Rb7 {[%eval
-35,28]} (25... Nc4 $17 {[%eval -146,24]} 26. Bxb8 Ne3) 26. Rae1 $2 {[%eval
-199,26]} (26. g4 $1 $15 {[%eval -35,28]}) 26... Rbe7 $1 {Cooper,J (2345)
-Gordon,S (2486) Sunningdale 2007 0-1 (32)}) (12. g3 $16 {[%eval 76,27]}) ({
Predecessor:} 12. Ne3 Nf4 13. Bc2 Qa5 14. Bd2 b5 15. g3 Ng6 16. cxb5 Qxb5 17.
Qe2 Qa5 18. O-O {1-0 (44) Lapienis,D-Heilemann,P Poland 1975}) 12... Nf4 $11 {
The position is equal.} 13. O-O g6 14. h3 Bd7 15. Qf3 N6h5 $2 {[%eval 84,30]} (
{But not} 15... Nxd3 $6 16. Qxd3 Ne8 17. Bh6 $14) (15... g5 $1 $17 {[%eval -97,
29] and life is bright.}) 16. Nxh5 $16 Nxh5 17. Bh6 Ng7 {[%eval 136,25]} ({
Black should play} 17... Re8 {[%eval 76,31]}) 18. Qe3 f5 {[#]} 19. f4 $1 fxe4
20. Bxe4 {Black must now prevent fxe5.} exf4 21. Bxf4 Bf5 {next ...Re8 is good
for Black.} 22. Bxf5 Nxf5 23. Qe6+ Kg7 {aiming for ...Re8.} 24. Rae1 {Hoping
for g4.} Rf7 $2 {[%eval 421,25][%mdl 8192]} (24... h5 $16 {[%eval 71,29] is
more resistant.}) 25. Qe2 Kg8 26. g4 Ng7 27. Qh2 {[%eval 120,28]} (27. Bg3 $18
{[%eval 203,25]}) 27... Rd7 {[%eval 236,27]} (27... Rf6 $16 {[%eval 120,28]})
28. Re3 {[%cal Be1e3,Be3f3,Bf3f6][%mdl 32]} Qc7 $2 {[%eval 382,27] [#]} (28...
Qb6 {[%eval 214,28]} 29. Bh6 Rf8) 29. Ref3 $1 $18 Re8 30. Bh6 Ra8 31. Qf2 {
White wants to mate with Rf8+.} Qd8 32. Bg5 ({Weaker is} 32. Rf7 Qe8 $18) 32...
Qc8 33. Rf6 Qe8 34. Bh6 Rad8 35. Qf4 Qe7 36. a3 {[%cal Ba2a3,Ba3a4,Ba4a5][%mdl
32]} Qe8 37. a4 Qe7 38. a5 a6 39. Bg5 Qe8 40. Qg3 Qe5 41. Qxe5 dxe5 42. Bh6 Re8
43. Kf2 e4 44. Ke3 Rde7 45. R1f4 Re5 46. h4 R5e7 47. d6 Re5 48. d7 {Accuracy:
White = 60%, Black = 31%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "5"]
[White "Braga, Cicero Nogueira"]
[Black "Masculo, Jose Soares"]
[Result "1/2-1/2"]
[ECO "A07"]
[Annotator "Stockfish 16"]
[PlyCount "16"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. g3 d5 2. Nf3 Bg4 3. Bg2 c6 4. O-O Nf6 5. b3 Nbd7 6. Bb2 e6 7. d3 Bc5 8. Nbd2
Qe7 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "6"]
[White "Braga, Cicero Nogueira"]
[Black "Segal, Alexandru Sorin"]
[Result "1/2-1/2"]
[ECO "C42"]
[Annotator "Stockfish 16"]
[PlyCount "50"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Bg5 Qxe2+ 8.
Bxe2 Nbd7 9. Nbd2 h6 ({RR} 9... d5 10. O-O Bc5 11. d4 Bd6 12. Bd3 {1/2-1/2 (12)
Petrovic,A (2347)-Ilincic,Z (2301) Pozarevac SRB 2023}) 10. Bh4 Be7 $146 ({RR} 
10... g6 11. O-O-O Bg7 12. Rhe1 O-O 13. Nd4 a6 14. c3 Nc5 15. N2b3 Nxb3+ 16.
Nxb3 a5 17. Nd4 Bd7 18. Bf3 Rfb8 19. h3 g5 20. Bg3 Ra6 21. a3 b5 22. Nc2 Kf8
23. Kd2 h5 24. Ne3 b4 25. axb4 {Krol,A (2150)-Weglarz,L (2375) Nadole 1994 0-1
(35)}) 11. O-O-O Nf8 12. Rhe1 Ne6 13. Kb1 Bd7 14. Bf1 O-O-O 15. Nb3 Rde8 16.
Nbd4 Nxd4 17. Nxd4 Bd8 18. c3 g5 19. Bg3 Nh5 20. Be2 Nxg3 21. hxg3 c5 22. Nc2
h5 23. Ne3 h4 24. gxh4 Rxh4 25. Bf3 Rhh8 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "6"]
[White "Ary, Edgar Nadra"]
[Black "Sunye Neto, Jaime"]
[Result "0-1"]
[ECO "B92"]
[BlackElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "114"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. a4
b6 ({RR} 8... Be6) 9. f4 Nbd7 10. O-O Bb7 11. Bf3 Rc8 ({RR} 11... O-O 12. Be3
Rc8 13. Qe2 exf4 14. Bxf4 Ne5 15. Rad1 Qc7 16. Nd4 Rfe8 17. Kh1 Nc4 18. Bc1 Bf8
19. b3 Na5 20. Bb2 d5 21. Bg4 Nxe4 22. Nxe4 Rxe4 23. Qf3 Rce8 24. Bf5 Re3 25.
Qf2 g6 26. Bc1 {Morales,J-Sunye Neto,J (2360) Mexico City 1978 1/2-1/2 (63)})
12. Kh1 O-O 13. g4 $146 ({RR} 13. Be3 Rxc3 14. bxc3 Nxe4 15. fxe5 Nxe5 16. Bxe4
Bxe4 17. Qe2 d5 18. Nd4 Qc8 19. Nf3 Qxc3 20. Bd4 Qc4 21. Qd2 Nc6 22. c3 Nxd4
23. cxd4 b5 24. axb5 axb5 25. Ne5 Qc7 26. Rfc1 Qb7 27. Nc6 Bd6 {Silva,M-Dumpor,
A Zuerich 1983 0-1 (51)}) 13... exf4 14. Bxf4 Ne5 15. g5 Nfd7 16. h4 f6 17. Nd4
fxg5 18. Ne6 Qe8 19. Bxe5 Nxe5 20. Nxf8 Bxf8 21. Bg2 gxh4 22. Nd5 Rc4 23. Ra3
Bxd5 24. Qxd5+ Kh8 25. Raf3 Be7 26. R3f2 Qc8 27. Qb7 Ng6 28. e5 dxe5 29. Rf7
Rc7 30. Qxc8+ Rxc8 31. Bb7 Rd8 32. Bxa6 Bc5 33. Rc7 e4 34. c3 Bd6 35. Rc8 Rxc8
36. Bxc8 Bg3 37. Bf5 e3 38. Bxg6 hxg6 39. Rf8+ Kh7 40. Re8 Bf2 41. Kg2 Kh6 42.
Re5 g5 43. Kh3 Kh5 44. b4 Bg3 45. Rxe3 g4+ 46. Kg2 Bf4 47. Rd3 h3+ 48. Kg1 g3
49. c4 Kg4 50. c5 bxc5 51. bxc5 Kf5 52. a5 Ke4 53. Rd1 Be3+ 54. Kh1 Bxc5 55. a6
g5 56. Re1+ Kd5 57. Rb1 g2+ 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "6"]
[White "Trois, Francisco R Torres"]
[Black "Carvalho, Herbert Abreu"]
[Result "1-0"]
[ECO "E44"]
[WhiteElo "2385"]
[BlackElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "69"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 10,68,35,6,11,0,25,10,14,0,0,0,61,56,91,91,107,51,73,52,91,90,137,127,
167,127,214,214,210,212,192,215,210,204,208,205,196,196,200,195,199,2,2,2,5,0,
193,176,169,95,217,177,369,346,346,90,210,0,610,612,29999]} 1. d4 Nf6 2. c4 e6
3. Nc3 Bb4 4. e3 b6 5. Nge2 Ne4 6. f3 Nxc3 $1 {E44: Nimzo-Indian: Rubinstein:
4...b6 5 Ne2.} ({RR} 6... Bxc3+ {[%eval 62,25] 6...Nxc3 0.02} 7. bxc3 Nd6 8.
Ng3 Ba6 9. e4 {[%eval 0,31]} (9. Qa4 $1 $16 {[%eval 82,27]}) 9... Bxc4 10. Bxc4
Nxc4 11. O-O d5 {[%eval 77,29]} (11... O-O $15 {[%eval -33,29] stays ahead.})
12. Nh5 {[%eval -50,29]} (12. f4 $1 $16 {[%eval 77,29]}) 12... g6 13. Ng7+ {
[%eval -182,25]} (13. Nf4 $15 {[%eval -64,29]} O-O 14. Nd3) 13... Kd7 $1 14.
Bh6 Kc8 15. Qc1 Qf6 16. Re1 Nc6 $2 {[%eval -4,28]} (16... Kb7 $19 {[%eval -186,
32]} 17. exd5 exd5) 17. exd5 exd5 18. Ne8 $1 {[%cal Re8f6]} Qf5 19. Qf4 Qxf4
20. Bxf4 Kb7 21. Nxc7 {[%eval -56,29] Esipenko,A (2723)-Nepomniachtchi,I (2773)
chess.com INT 2022 1-0 (66)} (21. Nf6 $1 $14 {[%eval 38,31]})) 7. bxc3 Ba5 $146
({Predecessor:} 7... Be7 8. e4 O-O 9. Ng3 c5 10. d5 Bf6 11. Bd2 d6 12. Be2 e5
13. Qc1 g6 14. a4 Bh4 15. Kd1 a5 16. Kc2 Ra7 17. Bh6 Re8 18. Bd3 f6 19. Kb3 Bg5
20. Bxg5 fxg5 21. Nf1 Rf7 {1/2-1/2 (21) Debarnot,R (2380)-Visier Segovia,F 
(2375) Lanzarote 1975}) 8. Bd2 O-O $146 {The position is equal.} ({RR} 8... c5
9. Ng3 O-O 10. Bd3 Ba6 11. O-O Nc6 12. Qc2 g6 13. f4 f5 {[%eval 47,24]} (13...
cxd4 $1 $15 {[%eval -47,32]} 14. exd4 Rc8) 14. d5 $1 {[%cal Rd5c6]} Ne7 $1 15.
e4 fxe4 16. Nxe4 exd5 17. cxd5 c4 18. Be2 Nxd5 {[%eval 144,27]} ({Black should
try} 18... b5 $1 $14 {[%eval 67,27]}) 19. f5 b5 20. a4 {[%eval 0,30]} (20. Bf3
$16 {[%eval 104,24]}) 20... Bb6+ $2 {[%eval 206,27]} (20... gxf5 $11 {[%eval 0,
30]} 21. axb5 Bxb5) 21. Kh1 Ne3 $2 {[%eval 375,23]} (21... Bc7 $16 {[%eval 147,
26]}) 22. Bxe3 $1 Bxe3 23. fxg6 {Petkov,V (2511)-Drei,A (2260) Cesenatico 2011
1-0 (39)}) ({RR} 8... c5 9. Nc1 cxd4 10. exd4 O-O 11. Nb3 Nc6 12. Bd3 Ba6 13.
Qc2 Qh4+ 14. g3 Qh3 15. Kf2 Rac8 16. Rae1 Qh5 {[%eval 135,28]} (16... d5 $11 {
[%eval 15,29]} 17. Bf1 Qh5) 17. Re4 {[%eval 8,30]} ({Better is} 17. h4 $16 {
[%eval 135,28]} f5 18. d5) 17... f5 18. Rh4 Qf7 19. g4 {[%eval -157,25]} (19.
Re1 $11 {[%eval -27,27]}) 19... Ne7 $1 20. Nxa5 Ng6 {[%eval -121,30]} (20...
bxa5 $19 {[%eval -187,29]} 21. Rh3 Bxc4) 21. Rh3 fxg4 $1 22. Rg3 bxa5 23. h3 {
Sorm,D (2347)-Poetsch,H (2498) Pardubice 2015 0-1 (35)}) 9. e4 c5 10. d5 f5 {
[%eval 61,26]} (10... d6 $11 {[%eval 0,27]}) 11. exf5 $14 exf5 {[%eval 103,26]}
(11... Bb7 $14 {[%eval 48,27]}) 12. Nf4 g5 13. Nh3 {[%eval 51,26]} (13. Ne2 $16
{[%eval 106,20]}) (13. Ne2 $16 {[%eval 107,20]}) 13... h6 {[%eval 82,20]} (
13... f4 $11 {[%eval 17,19] remains equal.}) 14. Bd3 Qf6 15. Qc2 Re8+ {[%eval
153,32]} ({Black should play} 15... b5 {[%eval 93,29]}) 16. Kf2 $16 d6 17. Rhe1
Rxe1 {[%eval 214,26]} (17... Rf8 $16 {[%eval 131,29] was necessary.}) (17...
Rf8 $16 {[%eval 127,29] was worth a try.}) 18. Rxe1 $18 {Hoping for Re8+.} Bd7
19. Kg1 Na6 20. Nf2 Nc7 21. g4 $1 Rf8 22. gxf5 Bxf5 23. Bxf5 Qxf5 24. Qxf5 Rxf5
25. Re7 $2 {[%eval 2,31]} (25. Ne4 $1 $16 {[%eval 135,20]}) (25. Ne4 $1 $18 {
[%eval 199,29]}) 25... b5 $1 $11 26. cxb5 c4 27. Kg2 Bb6 $2 {[%eval 193,25] [#]
} (27... Rxd5 $11 {[%eval 0,34] and Black has nothing to worry.} 28. Ne4 Rd3) (
27... Rxd5 $11 {[%eval 0,32]} 28. Ne4 Rd3) 28. Ne4 $1 $18 Nxb5 {[%eval 113,24]
[#]} (28... Kf8 $18 {[%eval 168,28]} 29. Rd7 $1 Rxd5 {[%eval 274,30]} (29...
Nxb5 $142 {[%eval 185,30]} 30. a4 Nc7)) 29. h4 $1 {[%eval 95,33][%mdl 512]} Kf8
{[%eval 217,32]} (29... Nc7 $16 {[%eval 81,22]}) (29... Nc7 $16 {[%eval 95,33]}
) (29... gxh4 30. Bxh6) 30. Rd7 Rxd5 $2 {[%eval 369,32]} (30... Nc7 $16 {
[%eval 156,30] is a better defense.} 31. Rxd6 {[%eval 113,29]} (31. hxg5 hxg5
32. Bxg5 Nxd5 $16) (31. Kg3 $18 {[%eval 181,26]}) 31... Nxd5) (30... Nc7 {
[%eval 177,33] might work better.} 31. hxg5 (31. Rxd6 Rxd5 32. Rxh6 gxh4 $16)
31... hxg5) 31. hxg5 hxg5 {[#]} 32. Bxg5 $2 {[%eval 90,28]} ({White must play} 
32. a4 $1 $18 {[%eval 305,30]}) (32. a4 $1 $18 {[%eval 346,36] is the precise
move to win.}) 32... Rf5 {[%eval 210,30]} (32... Rxg5+ $14 {[%eval 70,31]} 33.
Nxg5 Ke8) (32... Rxg5+ $16 {[%eval 90,28]} 33. Nxg5 Ke8) 33. f4 $2 {[%eval 0,
34]} (33. Bh6+ $18 {[%eval 194,27]} Ke8 34. Rxd6 $1) ({White has to play} 33.
Bh6+ $18 {[%eval 210,30]} Ke8 34. Rxd6) 33... d5 $2 {[%eval 610,30][%mdl 8192]}
(33... Rf7 $11 {[%eval 0,34]} 34. Rxf7+ Kxf7) (33... Rf7 $11 {[%eval 0,34]} 34.
Rxf7+ Kxf7) 34. Nf6 {[%cal Rg5h6]} d4 {[%eval 32766,27] and the idea ...Rxf6
leaves Black hopeful.} (34... Rxf6 $18 {[%eval 417,30]} 35. Bxf6 d4 36. Bxd4
Nxd4 37. cxd4 Ke8) 35. Bh6# {Accuracy: White = 62%, Black = 36%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "6"]
[White "Rocha, Antonio Cavilhas"]
[Black "Filguth, Rubens Alberto"]
[Result "0-1"]
[ECO "E14"]
[WhiteElo "2385"]
[BlackElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "70"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 20,70,13,0,8,-69,-59,-110,-107,-120,-91,-66,-72,-75,82,87,132,131,243,
242,255,251,273,7,261,253,307,243,252,244,407,416,413,0,0,0,332,-87,-82,-83,0,
-93,-68,-91,0,0,0,-467,-462,-916,-900,-848,-793]} 1. Nf3 Nf6 2. c4 e6 3. d4 b6
4. e3 Bb7 5. Bd3 d5 6. O-O Nbd7 7. b3 Bd6 8. Bb2 O-O 9. Nc3 a6 10. Qe2 Ne4 11.
Rad1 f5 {E14: Queen's Indian: Classical Variation (4 e3).} ({RR} 11... Qe7 12.
Qc2 f5 13. Ne2 Rf6 14. Ne5 dxc4 15. Qxc4 b5 16. Qc2 Rh6 17. f3 Nef6 18. Qd2 c5
19. h3 Rd8 20. Nxd7 Nxd7 21. a4 cxd4 22. Nxd4 Qg5 {[%eval 59,24] 1/2-1/2 (22)
Oliveira,J (2579)-Serban,F (2635) ICCF INT 2016} (22... Ne5 $11 {[%eval 0,39]}
23. axb5 Nxd3 24. Qxd3 axb5)) 12. Nb1 $146 {[%eval -69,23]} ({RR} 12. Ne1 Rf6
13. f4 $1 Rh6 14. Nf3 g5 $2 {[%eval 232,24]} (14... Qe7 $11 {[%eval 8,25] and
Black is okay.}) 15. Bxe4 fxe4 16. Nxg5 {[%eval 105,24]} (16. Ne5 $1 $18 {
[%eval 224,23] is the precise move to win.}) 16... Qe7 17. Qg4 {[%eval 79,26]}
({Better is} 17. Rc1 {[%eval 145,26]}) 17... Nf6 18. Qg3 Rg6 19. Qh4 h6 20. Nh3
Qg7 21. Rd2 Rg4 22. Qe1 Kh7 23. Kh1 Rg8 24. Rg1 Qg6 25. Nd1 Nh5 {[%eval 169,20]
} (25... dxc4 $14 {[%eval 58,18]} 26. bxc4 Be7) 26. Ndf2 $4 {[%eval -323,16]
[%mdl 8192]} (26. g3 $18 {[%eval 169,20] and all is fine.}) 26... Rxg2 {
Maderna,C-Corte,C Buenos Aires 1947 1-0 (35)}) ({RR} 12. Nd2 Qh4 {[%csl Gd6]
[%cal Rh4h2]} 13. g3 Qh6 14. f3 Nxc3 {[%eval -2,27]} ({Black should try} 14...
Nxg3 $15 {[%eval -63,21]} 15. hxg3 Bxg3) 15. Bxc3 Rae8 16. e4 $2 {[%eval -177,
25]} (16. b4 $11 {[%eval -1,26]}) 16... dxe4 $1 17. fxe4 e5 {[%eval -38,26]} (
17... f4 $19 {[%eval -168,27]} 18. gxf4 Bxf4) 18. d5 {[%eval -110,24]} (18.
Rxf5 $15 {[%eval -38,26]} exd4 19. Rxf8+ Rxf8 20. Bxd4) 18... f4 $1 19. b4 {
[%eval -179,22]} (19. gxf4 $17 {[%eval -116,27] might work better.} exf4 20.
Nf3) 19... Bc8 20. Nb3 {[%eval -263,23]} (20. Nf3 $17 {[%eval -159,28]}) 20...
fxg3 21. hxg3 Qg5 22. Kg2 Nf6 23. c5 $2 {[%eval -523,23]} (23. Bd2 {[%eval
-165,28]} Qg6 24. Qe3) 23... Bg4 24. Qd2 Qh5 25. cxd6 Qh3+ 26. Kg1 Bxd1 {
Chan,K (2303)-Goltseva,E (2286) chess.com INT 2021 1-0 (92)}) ({RR} 12. Nd2
Ndf6 13. f4 Bb4 14. Ncb1 Qe7 15. Nf3 Ng4 16. Rc1 Bd6 17. Nbd2 (17. Bxe4 $5 fxe4
18. Ne5 $11) 17... c5 {[%eval 48,26]} (17... a5 $11 {[%eval -21,26]}) 18. Ne5 {
[%eval -73,29]} (18. cxd5 $14 {[%eval 48,26] stays ahead.} exd5 19. Ne5) 18...
Nxh2 $2 {[%eval 200,25][%mdl 8192]} (18... Bxe5 $17 {[%eval -73,29]} 19. dxe5
Nxd2 20. Qxd2 dxc4 21. bxc4 Rad8) 19. Kxh2 Qh4+ 20. Kg1 Ng3 21. Qe1 $1 Bxe5 22.
fxe5 {[%eval 105,27]} (22. Nf3 $1 $18 {[%eval 187,27][%cal Rf3h4]} Qh1+ 23. Kf2
Nxf1 24. Nxe5) 22... dxc4 23. Nf3 $1 {[%cal Rf3h4]} Qh1+ 24. Kf2 Nxf1 25. Qxf1
Qh6 26. Bxc4 f4 {[%eval 128,23] Mahn,F (2094)-Kaiser,J (2085) Berlin 1996 1-0 
(54)} ({Black should play} 26... b5 $1 $14 {[%eval 54,28]} 27. Bd3 cxd4)) (12.
cxd5 $11 {[%eval 8,30]} exd5 13. Ne5) ({Predecessor:} 12. Ne1 Rf6 13. f4 Rh6
14. Nf3 g5 15. Bxe4 fxe4 16. Nxg5 Qe7 17. Qg4 Nf6 18. Qg3 Rg6 19. Qh4 {1-0 (35)
Maderna,C-Corte,C Buenos Aires 1947}) 12... Rf6 $15 13. Ne5 Rh6 {Black is
better.} 14. g3 Bxe5 15. dxe5 Ng5 16. f3 Qe8 $2 {[%eval 82,22]} (16... dxc4 $1
$17 {[%eval -75,25] stays on course.} 17. Bxc4 Nh3+ 18. Kg2 Qe8) 17. cxd5 $16
Bxd5 {[#]} 18. Bxf5 $1 {[%mdl 512]} Bc6 {[%eval 243,25]} (18... exf5 $16 {
[%eval 131,29]} 19. Rxd5 c6) 19. Bg4 $18 Qg6 (19... Bb5 20. Qc2 $16) 20. Na3
Nc5 {...Rh4 would now be nice for Black.} 21. Bd4 $2 {[%eval 7,27]} (21. e4 $18
{[%eval 273,29]}) 21... Nce4 $2 {[%eval 261,26][%mdl 8192]} (21... Rh4 $1 $11 {
[%eval 7,27]} 22. Bxc5 bxc5 23. gxh4 Nxf3+ {[%mdl 64] Remove Defender, Decoy}
24. Rxf3 Qxg4+ {[%mdl 64] Double Attack, Pin} 25. Qg2 Qxf3 26. Qxf3 Bxf3) 22.
Qc2 Bd5 23. fxe4 Bxe4 24. Qe2 $1 {Hoping for Rf4.} ({Stronger than} 24. Qxc7
Qh5 $11) 24... Nh3+ $2 {[%eval 407,22]} (24... Rh4 {[%eval 244,30]} 25. Rf4 (
25. gxh4 $2 {gets mated.} Nh3#) 25... Rxg4) 25. Bxh3 Rxh3 26. Qf2 $2 {[%eval 0,
26]} (26. Rf4 $1 $18 {[%eval 413,24]}) 26... h5 $1 $11 {[%cal Rh5h4] aiming
for ...h4.} 27. Qf4 $1 {Strongly threatening Bb2.} Kh7 $2 {[%eval 332,29][%mdl
8192]} (27... h4 $1 $11 {[%eval 0,26] and Black stays safe.} 28. g4 Kh7) 28.
Rf2 $2 {[%eval -87,25]} (28. Nc4 $18 {[%eval 332,29]} h4 29. Nd2) 28... h4 $1
$17 {[%cal Rh4g3][%mdl 1024] Black has strong compensation.} 29. Rg2 {[#]} Rd8
{[%eval 0,35]} (29... Rf8 $1 $17 {[%eval -83,27]} 30. Qxf8 hxg3) 30. Rf1 {
[%eval -93,26]} (30. Rdd2 $11 {[%eval 0,35] remains equal.}) 30... c5 31. Bc3 {
[#] next Be1 is good for White.} b5 {[%eval 0,44]} (31... Rf8 $1 $17 {[%eval
-91,32][%cal Rf8f4]} 32. Qxf8 hxg3) 32. Be1 $11 Rd1 $40 {[%cal Bd8d1,Bd1e1,
Be1e3,Be3f3][%mdl 160] Black is up to no good.} 33. g4 $2 {[%eval -467,25]
[%mdl 8192]} (33. Bf2 $11 {[%eval 0,44] and White has nothing to worry.} Rd2
34. Nb1) 33... Rxe1 $19 {Black is clearly winning.} 34. Rgf2 {[%eval -916,23]}
(34. Rxe1 $142 {[%eval -462,29]} Rf3 35. Rf2 Rxf4 36. Rxf4) 34... Rexe3 {
( -> ...Reg3+)} 35. Rd2 Ref3 {Accuracy: White = 49%, Black = 47%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "6"]
[White "Masculo, Jose Soares"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "A11"]
[BlackElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "55"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. g3 d5 2. Nf3 c6 3. c4 dxc4 4. a4 ({RR} 4. Qc2 Qd5 5. Bg2 Bf5 6. Qc3 Nf6 7.
Nh4 Be4 8. f3 Bxb1 9. Rxb1 Nbd7 10. b3 cxb3 11. Rxb3 Nb6 12. f4 Qd8 13. Nf3 e6
14. Qc2 Be7 15. Bb2 Qd5 16. Nh4 Qa5 17. Bc3 Qa4 18. O-O Nbd5 {Hou Yifan (2664)
-Fedoseev,V (2677) Jinan CHN 2019 1-0 (77)}) ({RR} 4. Na3 Be6 5. Qc2 Nd7 6. Ng5
Bg4 7. Nxh7 Ne5 8. Nxf8 Qd5 9. Rg1 Rxh2 10. Nh7 Nd3+ 11. Kd1 Nxf2+ 12. Ke1 Nd3+
13. Kd1 Rh1 14. Rxh1 Qxh1 15. Qxc4 Qxf1+ 16. Kc2 Ne5 17. Qd4 Qxe2 18. Ng5 Rd8 {
Shuvalov,E (2182)-Shton,R (2074) chess.com INT 2022 0-1 (34)}) 4... g6 5. Na3
$146 ({RR} 5. Bg2 Bg7 6. O-O Nf6 7. Na3 O-O 8. Nxc4 b6 9. Nfe5 Bb7 10. a5 Nd5
11. d4 b5 12. a6 Nxa6 13. Na5 Qc8 14. Bxd5 cxd5 15. Bf4 Bxe5 16. Bxe5 Qd7 17.
Qb3 Rfc8 18. Nxb7 Qxb7 19. Ra5 Nc7 {Bolacky,J (2166)-Dvorak,T (2116) Czechia
2000 1/2-1/2 (42)}) 5... Bg7 6. Nxc4 Be6 7. Qc2 Na6 8. a5 Qd5 9. d3 h5 10. Bg2
h4 11. Nxh4 Qd7 12. Nf3 Bh3 13. Nce5 Bxe5 14. Nxe5 Qe6 15. Bxh3 Rxh3 16. Qc3
Nf6 17. Bf4 Rh5 18. e4 Nc7 19. a6 Nxa6 20. Ra5 Nc7 21. Qc4 Qxc4 22. Nxc4 Rxa5
23. Nxa5 O-O-O 24. Ke2 Ne6 25. Be3 Nd4+ 26. Bxd4 Rxd4 27. Rc1 Rb4 28. Rc2
1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "6"]
[White "Pimenta, Jeronimo Marques"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "0-1"]
[ECO "A56"]
[BlackElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "96"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 {Marin,M} c5 2. d5 Nf6 3. c4 e5 4. Nc3 d6 5. e4 Be7 6. g3 Nbd7 7. Bg2 O-O
8. Nh3 ({RR} 8. Nge2 a6 ({RR} 8... Ne8 9. O-O g6 10. Bh6 ({RR} 10. Be3 Ng7 11.
Qd2 f5 12. f3 Nf6 13. Kh1 Bd7 14. a4 a6 15. Qd3 Qc7 16. Bg1 g5 17. exf5 Nxf5
18. f4 exf4 19. gxf4 g4) 10... Ng7 11. f4 ({RR} 11. Qd2 Nf6 12. h3 Kh8 13. Rae1
Ng8 14. Be3 f5 15. f4 Bf6 16. Kh2 b6 17. a3 a6 18. fxe5 Bxe5 19. Nf4) 11...
exf4 12. gxf4 f5 13. exf5 Rxf5 ({RR} 13... gxf5 14. Qd3 Nf6 15. Ng3 Ng4 16.
Bxg7 Kxg7 17. Rae1) 14. Ng3 ({RR} 14. Bh3 Rh5) 14... Rf8 15. Bh3 ({RR} 15. Qc2
Nf6 16. h3 Rf7 17. Bxg7 Kxg7 18. f5 Nd7 19. fxg6 Rxf1+ 20. Rxf1 hxg6 21. Nh5+
gxh5 22. Rf7+ Kxf7 23. Qh7+ Kf8) 15... Nb6 16. Bxc8 Rxc8 17. Qd3 Bf6 18. Rae1
Rc7 19. b3 Nc8 20. Nce4) 9. a4 ({RR} 9. O-O b5 ({RR} 9... Rb8 10. a4 Ne8 11. h3
b6 12. b3 Nc7 13. Qd3 Bf6 14. Be3 Re8 15. Ra2 Nf8 16. Rb1 a5 17. Rf1) 10. cxb5
Qa5 11. bxa6 Bxa6) 9... b6 10. O-O Ne8 11. Kh1 ({RR} 11. f4 exf4 12. gxf4 Ra7 (
{RR} 12... g6 13. Ng3 Ng7 14. e5) 13. Ng3 g6 14. f5 Bg5) ({RR} 11. Be3 Nc7 ({RR
} 11... g6) 12. Ra3 Rb8 13. Rb3 Bg5 14. f4 Bh6 15. Qd3 Kh8 16. Kh1 Qe8 17. Nb1
exf4 18. gxf4 f5 19. Ng3 fxe4 20. Nxe4 Qe7 21. Nbd2 Ne8 22. Ng5 Ndf6 23. Ndf3
g6 24. Nh4 Bxg5 25. fxg5 Ng4) ({RR} 11. Qc2 Rb8 12. Ra3 Kh8 13. Bd2 g6 14. Rb1
Ng7 15. b4 f5 16. b5 a5 17. Rf1 Bg5 18. f3 Bxd2 19. Qxd2 f4 20. Bh3 ({RR} 20.
gxf4 exf4 21. Nxf4 Ne5) 20... g5 21. Bxd7 Bxd7 22. g4 Rf6) 11... g6 ({RR} 11...
Ra7 12. Qc2 Kh8 13. Rb1 g6 14. Bh6 Ng7 15. f4 exf4 16. gxf4 Nf6 17. h3 Ng8 18.
Bxg7+ Kxg7 19. e5 Qc7) 12. Bh6 Ng7 13. Qd2 ({RR} 13. f4 exf4 14. gxf4) 13...
Nf6 14. f3 ({RR} 14. f4 Ng4 15. Bxg7 Kxg7 16. h3 Nh6 17. fxe5 ({RR} 17. Rae1
exf4 18. gxf4 Bh4 19. Rd1 Ra7) 17... dxe5) 14... Bd7 15. Rab1 Rb8 16. b4 Qc7
17. b5 a5 18. Nc1 Nfh5 ({RR} 18... Kh8 19. Nd3 Ng8 20. Be3 f5 21. f4) 19. Nd3 (
{RR} 19. g4 Nf4 20. Bxf4 exf4 21. Qxf4 f5 22. exf5 gxf5 23. g5 h6 ({RR} 23...
Nh5 24. Qh4 Be8 25. Nd3) 24. gxh6 ({RR} 24. h4 Nh5 25. Qh2 f4) 24... Nh5 25.
Qd2 Kh7) 19... f5 20. f4 ({RR} 20. exf5 gxf5 21. f4 e4 22. Nf2) 20... exf4 21.
Nxf4 Nxf4 22. Bxf4 Rbe8 {Kasimdzhanov,R (2690)-Nisipeanu,L (2668) Vitoria
Gasteiz 2007 CBM 121 [Marin,M] 1/2-1/2}) ({RR} 8. Nge2 a6 9. O-O b5 10. cxb5
axb5 11. Nxb5 Ba6 12. Nbc3 Qa5 13. Bd2 Rab8 14. b3 Rfc8 15. Re1 Qc7 16. Rc1 Qa7
17. Bh3 Rc7 18. Be3 Nf8 19. f4 Ng6 20. Rb1 Bf8 21. Qd2 Re8 22. f5 Ne7 {Freitag,
M (2360)-Kahlert,T (2155) chess.com INT 2021 1-0 (68)}) 8... a6 9. O-O $146 ({
RR} 9. a4 Rb8 10. O-O Ne8 11. f4 Nc7 12. a5 b5 13. axb6 Nxb6 14. b3 Bxh3 15.
Bxh3 Bf6 16. Bd2 Nd7 17. Bxd7 Qxd7 18. f5 Rb7 19. h4 Rfb8 20. Ra3 Qe7 21. Kg2
Ne8 22. Ne2 Qd8 23. Kh3 Be7 {Ljubojevic,L (2610)-Speelman,J (2630) Roquebrune
1992 1-0 (90)}) ({RR} 9. a4 Ne8 10. O-O g6 11. f4 Ng7 12. Nf2 f5 13. exf5 gxf5
14. Nd3 Bf6 15. Qc2 Re8 16. Nd1 Rb8 17. Ne3 exf4 18. Nxf4 Bd4 19. Ra3 Ne5 20.
h3 b5 21. axb5 axb5 22. cxb5 Rxb5 23. Kh2 Qf6 {Brandts,P-Grefe,J Lone Pine,CA
1973 0-1 (47)}) 9... b5 10. Qe2 bxc4 11. Nd1 Nb6 12. Ne3 Bd7 13. f4 Qc8 14.
fxe5 Bxh3 15. exf6 Bxf6 16. Bxh3 Qxh3 17. Nf5 Rad8 18. Bf4 g6 19. Bxd6 gxf5 20.
Bxf8 Bd4+ 21. Kh1 Rxf8 22. Rxf5 Nc8 23. Raf1 Ne7 24. Rg5+ Kh8 25. Rf4 f6 26.
Rh5 Qd7 27. Rxh7+ Kxh7 28. Qh5+ Kg7 29. Rg4+ Qxg4 30. Qxg4+ Ng6 31. h4 Kh6 32.
h5 Ne5 33. Qf5 Bxb2 34. g4 Bc1 35. d6 Bg5 36. Qf2 Rc8 37. d7 Rd8 38. Qxc5 Rxd7
39. Qc8 Kg7 40. Kg2 a5 41. Kf1 a4 42. Ke2 Bf4 43. a3 Kh6 44. Qf8+ Kg5 45. h6
Rd2+ 46. Kf1 Kxg4 47. Qc8+ Kg3 48. h7 Rf2+ 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "7"]
[White "Carvalho, Herbert Abreu"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "B53"]
[WhiteElo "2265"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "57"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 4. d4 cxd4 5. Qxd4 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8.
Bg5 e6 9. O-O-O Be7 10. Rhe1 O-O 11. Qd2 Qc7 12. Nd4 Rfd8 13. f4 Rac8 ({RR} 
13... h6 14. Bxf6 Bxf6 15. g4 Qb6 16. Kb1 Rac8 17. f5 Bd7 18. Nce2 Ba4 19. Nc3
Bd7 20. Nce2 d5 21. exd5 exf5 22. Nc3 Rc4 23. Nce2 fxg4 24. c3 Rc5 25. Nf4 Bg5
26. Rf1 Qd6 27. Nb3 Bf5+ 28. Ka1 {Lautier,J (2645)-Timman,J (2590) Belgrade
1995 0-1 (54)}) ({RR} 13... h6 14. h4 b5 15. Ncxb5 Bxb5 16. Nxb5 Qb7 17. Nc3
Rab8 18. b3 hxg5 19. hxg5 Ne8 20. Rh1 d5 21. exd5 Bb4 22. Rh3 Rxd5 23. Rdh1 Kf8
24. Rh8+ Ke7 25. Nxd5+ Qxd5 26. Qxd5 exd5 27. f5 Bc3 28. Rd1 {Alavi,S (2446)
-Matlakov,M (2674) chess.com INT 2022 0-1 (34)}) 14. Kb1 b5 $146 ({RR} 14... a6
15. a3 b5 16. f5 Bd7 17. g4 Qc4 18. Bh4 Re8 19. Nb3 Nd5 20. exd5 Bxh4 21. Re4
exf5 22. Rxc4 bxc4 23. Na5 fxg4 24. Qf4 Re5 25. Nxc4 Bg5 26. Qd4 Bf6 27. Nxe5
Bxe5 28. Qa7 Bf5 29. Rf1 {Grinberg,R (2405)-Liang,C Buenos Aires 1978 1-0 (38)}
) ({RR} 14... a6 15. Bxf6 Bxf6 16. g4 b5 17. g5 Be7 18. a3 Ba8 19. f5 e5 20. f6
exd4 21. fxe7 Qxe7 22. Nd5 Bxd5 23. exd5 Qc7 24. Re4 Re8 25. Rde1 Rxe4 26. Rxe4
g6 27. Rxd4 Re8 28. h4 {1/2-1/2 (28) Fusi,C (2185)-Januschke,M Oberwart 1994})
15. Nxc6 Qxc6 16. Qd3 a6 17. Ne2 Qb7 18. Ng3 h6 19. Bxf6 Bxf6 20. Nh5 Qe7 21.
g4 Bh4 22. Rf1 g6 23. Ng3 Bf6 24. Qe2 Qc7 25. Rf3 Qc4 26. Rfd3 Qb4 27. Rb3 Qc4
28. Rbd3 Qb4 29. Rb3 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "7"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Trois, Francisco R Torres"]
[Result "1/2-1/2"]
[ECO "C91"]
[WhiteElo "2375"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "25"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. d4 Bg4 10. Be3 exd4 11. cxd4 Na5 12. Bc2 c5 13. h3 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "7"]
[White "Camara, Helder"]
[Black "Pimenta, Jeronimo Marques"]
[Result "1-0"]
[ECO "A85"]
[WhiteElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "103"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 9,103,31,31,-1,26,26,28,8,17,0,0,0,14,21,24,14,21,13,16,17,27,25,68,42,
83,33,29,21,45,30,33,25,38,25,57,2,0,4,5,0,1,3,6,5,12,13,11,15,151,145,116,111,
97,100,186,37,31,40,149,125,277,277,261,266,275,265,269,249,228,235,194,161,
146,154,347,342,343,332,453,447,444,445,445,407,467,453,471,407,9605,9605,902,
900,29986,29985,29985,29983]} 1. d4 e6 2. Nf3 f5 3. c4 Nf6 4. Nc3 Bb4 5. Qb3 a5
6. a3 {A85: Dutch Defence: 2 c4 Nf6 3 Nc3.} Bxc3+ $146 ({RR} 6... a4 7. Qc2
Bxc3+ $1 8. Qxc3 Ne4 9. Qc2 b6 {[%eval 70,24]} (9... O-O $11 {[%eval 2,27]})
10. g3 Bb7 11. Bg2 O-O 12. O-O Nc6 13. Rd1 Na5 {[%eval 62,26]} (13... d6 $11 {
[%eval 0,27]}) 14. Qxa4 d5 $1 15. cxd5 Bxd5 16. Qb4 $1 Nb3 17. Rb1 c5 18. Qe1
c4 19. Bf4 b5 20. h4 h6 21. Ne5 {Pakleza,Z (2496)-Narayanan,S (2673) chess.com
INT 2022 0-1 (31)}) (6... a4 $5 {[%cal Ra4b3]} 7. Qc2 (7. axb4 axb3 8. Rxa8 Nc6
$17) (7. Qxb4 Nc6 $17) 7... Bxc3+ 8. Qxc3 (8. bxc3 b6 $11) 8... b6 $11) ({
Predecessor:} 6... a4 7. Qc2 Bxc3+ 8. bxc3 b6 9. Bg5 Bb7 10. e3 h6 11. Bh4 Be4
12. Bd3 Bxd3 13. Qxd3 O-O 14. Bxf6 Qxf6 {1/2-1/2 (36) Pithart,F-Alster,L
Prague 1955}) 7. Qxc3 O-O ({RR} 7... b6 8. g3 Bb7 9. Bg2 O-O 10. O-O a4 11. Rd1
Be4 12. Bf4 {[%eval -30,27]} (12. Bg5 $142 {[%eval 27,28]}) 12... Nc6 13. Nd2
Bxg2 14. Kxg2 Nh5 15. d5 Nxf4+ 16. gxf4 exd5 17. cxd5 Ne7 18. Nf3 Nc8 19. Rac1
Ra7 $1 20. Rg1 Nd6 21. Kh1 {[%csl Gg1][%cal Rc3g7]} Qe7 $2 {[%eval 216,26]} (
21... g6 $14 {[%eval 57,27]}) 22. Qe5 $2 {[%eval 23,32] Guo,W (1873)-Li Haoyu 
(2372) Tianjin CHN 2023 1-0 (49)} (22. Rxg7+ $1 $18 {[%eval 216,26][%mdl 512]}
Qxg7 23. Rg1 {[%mdl 64] Pin})) 8. Bg5 $146 {White has an edge.} ({RR} 8. g3 b6
9. Bg2 Bb7 10. O-O d6 11. Rd1 Qe7 12. Be3 Nbd7 13. Rac1 Rad8 14. Qb3 Kh8 15. c5
Bd5 16. Qa4 Rc8 17. c6 Nb8 18. b4 Qe8 {[%eval 181,23]} (18... axb4 $14 {
[%eval 43,29]} 19. axb4 b5 20. Qxb5 Qe8) 19. b5 Qh5 20. h4 {[%eval 60,26]} (20.
Re1 $18 {[%eval 170,29]}) 20... Be4 $2 {[%eval 215,24]} (20... h6 $14 {[%eval
60,26]}) 21. Ng5 $1 {[%cal Rg5e6]} Bxg2 22. Kxg2 Rce8 {Torres,J (2032)-Lopez
Idarraga,D (2096) Medellin 2015 1-0}) ({RR} 8. g3 b6 9. Bg2 Bb7 10. b3 Qe8 11.
O-O d6 12. Rd1 Nbd7 13. Ne1 Bxg2 14. Nxg2 e5 15. dxe5 Qxe5 16. Qxe5 Nxe5 17.
Bb2 Rfe8 {1/2-1/2 (17) Radovanovic,D (2367)-Cabrilo,G (2471) Pozarevac 2012})
8... d6 9. Bxf6 Qxf6 10. c5 Nd7 {[%cal Bb8d7,Bd7f6,Bf6e4][%mdl 32]} 11. cxd6
cxd6 12. e3 Qd8 13. Bc4 Nf6 14. O-O Ne4 15. Qb3 Rf6 16. Bd3 Rg6 17. Qc2 Bd7 18.
Qe2 ({Don't play} 18. Bxe4 fxe4 19. Nd2 (19. Qxe4 Bc6 $17) 19... Bb5 $15) 18...
Qe7 19. Nd2 Nxd2 20. Qxd2 Qg5 {[%csl Gg6][%cal Rg5g2]} 21. f4 Qh4 22. Qf2 Bc6
23. Qxh4 Rxg2+ 24. Kh1 Rg4+ 25. d5 $1 Bxd5+ 26. e4 $1 Bxe4+ 27. Bxe4 Rxh4 28.
Bg2 $36 {[%mdl 2048] White has good play.} Kf7 {[%eval 151,25]} (28... Rc8 $1
$11 {[%eval 15,32] remains equal.}) 29. Rac1 $16 Kf6 30. Bxb7 Rb8 31. Rc7 Rh3 {
[%eval 186,25] [#]} (31... a4 $16 {[%eval 100,31]}) 32. a4 {[%eval 37,30]} (32.
Re1 $1 $18 {[%eval 186,25]}) 32... Rb3 $14 33. Bc6 R8b4 {[%eval 149,28] [#]} ({
Better is} 33... Rxb2 $14 {[%eval 40,30]} 34. Bb5 h6) 34. Be8 $1 $16 {Hoping
for Rf7+.} e5 $2 {[%eval 277,28]} (34... Rb7 $16 {[%eval 125,34] was called
for.} 35. Rxb7 Rxb7) 35. fxe5+ $18 dxe5 36. Rf7+ Ke6 37. R7xf5 {Bf7+ is the
strong threat.} ({Less strong is} 37. R1xf5 Rxb2 38. Bd7+ Kd6 $16) 37... Rxb2
38. Bf7+ Kd6 39. Rd1+ Ke7 40. Bd5 Rxa4 41. Rxe5+ Kd6 $2 {[%eval 347,34]} (41...
Kf6 $16 {[%eval 154,34] keeps fighting.} 42. Re6+ Kg5) 42. Rg5 {Threatens to
win with Bb3+.} Rab4 43. Bg2+ ({Weaker is} 43. Rxg7 Rb1 $16) 43... Ke7 44.
Rxg7+ Kf6 45. Rxh7 a4 {If only Black now had time for ...a3....} 46. Ra7 Ke5
47. h3 Kf4 48. Rf7+ Ke3 {[%eval 9605,28]} (48... Ke5 $142 {[%eval 407,26]} 49.
Re7+ Kf6) 49. Re7+ Kf4 50. Rf1+ Kg3 51. Rg7+ Kh4 52. Rf8 {Accuracy: White =
71%, Black = 43%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "7"]
[White "Segal, Alexandru Sorin"]
[Black "Ary, Edgar Nadra"]
[Result "1-0"]
[ECO "A64"]
[Annotator "Stockfish 16"]
[PlyCount "61"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 23,61,7,6,0,39,25,49,19,40,44,33,38,40,42,76,52,46,44,249,253,231,203,
202,176,276,282,285,279,262,213,359,339,436,444,441,436,441,436,585,578]} 1. d4
Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9.
O-O a6 10. a4 Nbd7 11. Nd2 Re8 12. e4 Rb8 13. Nc4 {A64: Modern Benoni:
Fianchetto Variation: 9...Nbd7 10 Nd2 a6 11 a4 Re8.} Nb6 14. Na3 Bd7 $146 ({
Predecessor:} 14... Na8 15. Re1 Nc7 16. Bf1 b5 17. axb5 axb5 18. Naxb5 Nxb5 19.
Bxb5 Bd7 20. Bxd7 Qxd7 {0-1 (32) Quinteros,M-Estevez Morales,G Malaga 1974})
15. Bf4 {White is slightly better.} Qc7 16. a5 Nc8 17. Nc4 Nh5 $146 ({RR} 17...
Ng4 18. Re1 {[%eval 0,29]} (18. Rc1 $16 {[%eval 75,27]}) 18... Ne5 {[%eval 62,
27]} ({Black should try} 18... Bd4 $11 {[%eval 0,29]} 19. Ne3 Nxe3 20. Bxe3 Bg7
) 19. Nxe5 Bxe5 20. Bxe5 dxe5 21. d6 Nxd6 22. Nd5 Qd8 23. Nb6 Be6 24. Qc2 c4
25. Rad1 Qc7 26. f4 Rbd8 27. Kh1 Qc5 28. Nd5 Bxd5 $1 29. Rxd5 Qc7 $1 30. fxe5
Nb5 31. Red1 $2 {[%eval -201,27]} (31. Rxd8 $15 {[%eval -47,32]} Rxd8 32. e6)
31... Rxd5 32. exd5 {Wagh,S (2245)-Gabrielian,A (2463) chess.com INT 2020 0-1 
(47)}) ({RR} 17... Ng4 18. Re1 {[%eval -2,32]} (18. Rc1 $14 {[%eval 69,28]})
18... Ne5 {[%eval 60,26]} (18... Bd4 $11 {[%eval -2,32]} 19. Ne3 Nxe3 20. Bxe3
Bg7) 19. Nxe5 Bxe5 20. Bxe5 dxe5 21. d6 Nxd6 22. Nd5 Qd8 23. Nb6 Be6 24. Qc2 c4
25. Rad1 Qc7 26. f4 Rbd8 27. Kh1 Qc5 28. Nd5 Bxd5 $1 29. Rxd5 Qc7 30. fxe5 Nb5
31. Red1 $2 {[%eval -215,30]} ({White should play} 31. Rxd8 $15 {[%eval -44,33]
} Rxd8 32. e6) 31... Rxd5 32. exd5 {Wagh,S (2245)-Gabrielian,A (2463) chess.
com INT 2020 0-1 (47)}) 18. Bd2 Bb5 19. Qb3 $36 {[%mdl 2048] Black is under
pressure.} Bxc4 20. Qxc4 f5 $2 {[%eval 249,23] [#]} (20... Nf6 $14 {[%eval 44,
27]}) 21. exf5 $18 gxf5 22. Qh4 Qf7 23. Rae1 Rf8 {[%eval 276,27]} (23... Bf6
$142 {[%eval 176,26]} 24. Rxe8+ Qxe8) 24. Bf3 Nf6 25. Re6 b5 26. Qh3 Qg6 {
[%eval 359,29]} (26... b4 $142 {[%eval 213,24]}) 27. Ne2 Rb7 28. Nf4 {White is
clearly winning.} Qf7 29. Qxf5 Ne7 30. Qh3 Rd7 {[#]} 31. Rxf6 $1 {[%mdl 576]
Discovered Attack, Remove Defender. Accuracy: White = 82%, Black = 35%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "7"]
[White "Sunye Neto, Jaime"]
[Black "Masculo, Jose Soares"]
[Result "1/2-1/2"]
[ECO "E14"]
[WhiteElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "71"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 c5 2. b3 Nf6 3. Bb2 e6 4. e3 Be7 5. d4 O-O 6. Bd3 b6 7. O-O Bb7 8. Nbd2
d5 9. Qe2 Nbd7 10. c4 Bd6 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 Bxe4 14. Qxe4 Be7
$146 ({RR} 14... Qe7 15. Rad1 Rad8 16. Rfe1 Nf6 17. Qh4 cxd4 18. Nxd4 Nd5 19.
Qg4 f5 20. Qf3 Nf4 21. Nc6 Qh4 22. g3 Nh3+ 23. Kg2 Qg4 24. Qxg4 fxg4 25. f4 g5
26. Nxd8 {1-0 (26) Danielian,E (2458)-Van Weersel,A (2174) Kemer 2007}) 15.
Rad1 Bf6 16. dxc5 Bxb2 17. Qc6 Qc8 18. Qxc8 Rfxc8 19. Rxd7 bxc5 20. Rfd1 h6 21.
Rb7 a5 22. Rdd7 Rd8 23. g3 Rxd7 24. Rxd7 a4 25. Kf1 axb3 26. axb3 Ra3 27. Rd3
Kf8 28. Ke2 Ke7 29. Nd2 f5 30. f4 g5 31. Nf3 Bf6 32. Ne1 Ra1 33. Rd1 Ra3 34.
Rd3 Bd4 35. Nf3 Bf6 36. Ne1 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "7"]
[White "Filguth, Rubens Alberto"]
[Black "Braga, Cicero Nogueira"]
[Result "1/2-1/2"]
[ECO "C95"]
[WhiteElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "49"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 O-O 8. c3
d6 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 c5 15. d5
g6 16. Bg5 h6 17. Be3 Bg7 18. b3 Nb6 19. Qd2 h5 20. Bh6 Nh7 21. Bxg7 Kxg7 22.
a4 bxa4 23. bxa4 Nf6 $146 ({RR} 23... Nc4 24. Qe2 Na5 {1/2-1/2 (24) Gheorghiu,
F-Gligoric,S Los Angeles,CA 1974}) 24. Qe2 a5 25. Rab1 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "8"]
[White "Ary, Edgar Nadra"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "0-1"]
[ECO "C68"]
[BlackElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "86"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bd6 6. d4 exd4 7. Qxd4 f6 8.
Re1 Ne7 9. e5 fxe5 10. Nxe5 O-O 11. Bg5 Qe8 12. Nc4 Nf5 13. Qd2 Qg6 14. Nxd6
Nxd6 15. Nc3 $146 ({RR} 15. Bh4 Bf5 16. Na3 Rf7 17. Rac1 Rd7 18. Qg5 {1/2-1/2 
(18) Dulic,G (2272)-Lalic,B (2507) Sibenik 2012}) 15... Bf5 16. Rac1 b5 17. Bh4
Nc4 18. Qd4 Nxb2 19. Nxb5 axb5 20. Qxb2 Be6 21. Qe5 Bd5 22. Qg3 Rxa2 23. Qxg6
hxg6 24. Re7 Rf7 25. Re8+ Kh7 26. Bg5 c5 27. Rb8 Bc6 28. h4 Ra8 29. Rxa8 Bxa8
30. c4 b4 31. Kf1 Be4 32. Rd1 Bc2 33. Rd8 Bb3 34. Be3 Bxc4+ 35. Ke1 b3 36. Kd2
c6 37. Bxc5 Rb7 38. Bd4 b2 39. Bxb2 Rxb2+ 40. Kc3 Rxf2 41. Kxc4 Rxg2 42. Rc8 g5
43. h5 Re2 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "8"]
[White "Pimenta, Jeronimo Marques"]
[Black "Braga, Cicero Nogueira"]
[Result "0-1"]
[ECO "E91"]
[Annotator "Stockfish 16"]
[PlyCount "52"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 Bg4 7. O-O Nfd7 8. Be3
Bxf3 9. Bxf3 Nc6 10. d5 Na5 11. Be2 Bxc3 12. bxc3 e5 13. Rb1 ({RR} 13. Bh6 Re8
14. f4 b6 15. f5 Qh4 16. Qd2 Nc5 17. g3 Qh3 18. fxg6 hxg6 19. Bf3 Rf8 20. Qg5
Kh7 21. Bxf8 Rxf8 22. Qe7 Qh6 23. Rae1 Kg8 24. Re2 Nxc4 25. Bg2 f5 26. exf5
gxf5 27. Qxc7 Ne3 {Antonio,V (2410)-Sindarov,J (2658) Doha QAT 2023 0-1 (43)})
({RR} 13. f4 exf4 14. Rxf4 Qe7 15. Qe1 Rae8 16. Rh4 f5 17. Bh6 Rf7 18. Qg3 Nc5
19. exf5 Rxf5 20. Rf1 Ne4 21. Qg4 Nf6 22. Qg3 Ne4 23. Qg4 Nf6 24. Qg3 Ne4 {
1/2-1/2 (24) Trindade,S (2305)-Braga,C (2355) Curitiba 1992}) 13... b6 14. f4
exf4 15. Bxf4 $146 ({RR} 15. Rxf4 Qe7 16. Bd4 Ne5 17. Qf1 Rae8 18. Kh1 Nb7 19.
Qf2 Nc5 20. Rf1 Ncd3 21. Qg3 Nxf4 22. Rxf4 f6 23. h4 Rf7 24. Kg1 Ref8 25. h5
Rg7 26. h6 Rgf7 27. Bg4 Nxg4 28. Rxg4 Re8 29. Qf4 Kf8 {Yanev,T (2354)-Albornoz
Cabrera,C (2573) chess.com INT 2020 0-1 (32)}) ({RR} 15. Rxf4 Qe7 16. Bd4 Ne5
17. Qf1 Rae8 18. Kh1 Nb7 19. Qf2 Nc5 20. Rf1 Ncd3 21. Qg3 Nxf4 22. Rxf4 f6 23.
h4 Rf7 24. Kg1 Ref8 25. h5 Rg7 26. h6 Rgf7 27. Bg4 Nxg4 28. Rxg4 Re8 29. Qf4
Kf8 {Yanev,T (2354)-Albornoz Cabrera,C (2573) chess.com INT 2020 0-1 (32)})
15... Qe7 16. Qd2 Nb7 17. Bg4 Ne5 18. Bh3 Nxc4 19. Qf2 Nc5 20. Bh6 Rfe8 21. Qd4
Ne5 22. g3 f6 23. Rf2 Nf7 24. Be6 Nxe6 25. dxe6 Nxh6 26. Rxf6 c5 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "8"]
[White "Camara, Helder"]
[Black "Carvalho, Herbert Abreu"]
[Result "0-1"]
[ECO "A62"]
[WhiteElo "2325"]
[BlackElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "96"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 19,96,56,75,36,54,13,17,19,18,-30,-15,-19,-22,-19,71,60,73,82,62,73,87,
57,51,46,47,49,54,-38,0,0,0,-60,151,148,130,-80,-22,-30,-30,-54,-61,-60,-29,
-139,521,0,483,-337,-47,-187,22,15,204,172,196,-359,-340,-331,-330,-303,-273,
-450,-464,-492,-466,-462,-493,-484,-434,-671,-781,-648,-638,-594,-574,-575,
-575,-580,-587]} 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7.
Bg2 Bg7 8. Nf3 O-O 9. O-O Nbd7 10. Bf4 Ne8 11. e4 $146 {A62: Modern Benoni:
Fianchetto Variation without early ...Nbd7.} ({Predecessor:} 11. Qd2 a6 12. a4
Nb6 13. e4 Bg4 14. Rfe1 Nc4 15. Qc2 Qa5 16. Rac1 Bxf3 17. Bxf3 b5 18. Be2 Qb4
19. axb5 axb5 20. Nxb5 Qxb5 {1-0 (36) Smyslov,V-Zaichik,G Moscow 1972}) 11...
Ne5 12. Nxe5 dxe5 13. Be3 {The position is equal.} b6 14. f4 Nd6 15. a4 $146 ({
RR} 15. Qe2 a5 16. Rfd1 Ba6 17. Qc2 f5 18. fxe5 Bxe5 19. Bh6 Rf7 20. Rab1 $2 {
[%eval -385,24][%mdl 8192]} (20. Bf4 $17 {[%eval -111,27] keeps fighting.} Bxf4
21. gxf4 fxe4 {[%mdl 64] Discovered Attack} 22. Nxe4) 20... Qf6 {[%eval -167,
27]} (20... g5 $142 {[%eval -385,24]} 21. Qd2 f4) 21. exf5 $2 {[%eval -432,20]}
(21. Bf4 {[%eval -167,27] is a better defense.}) 21... gxf5 $2 {[%eval -93,27]}
(21... g5 $19 {[%eval -432,20]} 22. Re1 Re8) 22. Bf4 {[%eval -176,25]} (22. Qd2
$17 {[%eval -93,27]}) 22... Re8 $2 {[%eval -20,30]} (22... Bxf4 $19 {[%eval
-176,25]} 23. gxf4 Kh8) 23. Re1 Bxf4 24. Rxe8+ Nxe8 25. gxf4 Nd6 26. Re1 Re7
27. Re6 {[%eval -122,31]} (27. Rxe7 $11 {[%eval -7,28]} Qxe7 28. Qf2) 27...
Rxe6 28. dxe6 Bc4 29. Qd2 Qd4+ $1 {Kopinitz,J-Lorbek,R Bled 1992 1/2-1/2 (48)})
15... Bd7 16. Qe2 Re8 {[%eval 71,24]} (16... Qe7 $11 {[%eval -19,25]}) 17. f5
$1 $36 {[%mdl 2048] White is more active.} gxf5 18. Qh5 f4 19. gxf4 Nc4 20. Bc1
{f5 is the strong threat.} exf4 $1 21. Rxf4 Re5 22. Qe2 Nd6 23. Nb5 {[%eval
-38,27]} (23. Rf1 $14 {[%eval 54,25]}) 23... Nxb5 (23... Bxb5 $5 24. axb5 f5
$15) 24. axb5 Qe8 25. Ra3 {[%eval -60,27]} (25. Qf2 $11 {[%eval 0,25]}) 25...
Bxb5 $2 {[%eval 151,24]} (25... Rxd5 $15 {[%eval -60,27] stays ahead.} 26. Rg3
Rd6) 26. Qf2 $1 ({Reject} 26. Qg4 $6 f5 $11) 26... Rg5 27. Rg3 $2 {[%eval -80,
23]} (27. h4 $1 $16 {[%eval 130,27][%cal Rh4g5] is necessary to keep the
advantage.} Rg6 28. h5) 27... Rxg3 {[%eval -22,28]} ({Black should try} 27...
Rg6 $1 $17 {[%eval -80,23]} 28. Rf5 Bd7) 28. Qxg3 {Threatens to win with Rg4.}
Qe5 {Strongly threatening ...Qd4+.} 29. Qf3 Qd4+ 30. Kh1 Rf8 (30... Qb4 $5 {
[%cal Rb4e1]} 31. Qf2 Qd4 $15) 31. Rh4 {[%eval -139,28] [#]} (31. Bh3 $1 $11 {
[%eval -29,26] keeps the balance.}) 31... Kh8 $2 {[%eval 521,25][%mdl 8192]} (
31... f5 $1 $17 {[%eval -139,28][%mdl 512]} 32. Qh5 (32. exf5 Qxh4) 32... h6)
32. Bh3 $2 {[%eval 0,40]} (32. Qh5 $18 {[%eval 521,25][%csl Gh4][%cal Rh5h7]}
Bh6 33. Bxh6 Qxb2 34. Bf3) 32... f5 $2 {[%eval 483,28][%mdl 8192] [#]} (32...
Qb4 $11 {[%eval 0,40]} 33. Qg3 Qd4) 33. Rf4 $4 {[%eval -337,25][%mdl 8192] [#]}
(33. Bxf5 Bd7 $11) (33. Qh5 $1 $18 {[%eval 483,28][%csl Gh4][%cal Rh5h7] is
the narrow road to win.} Bh6 34. Bxh6) 33... Bh6 $2 {[%eval -47,27]} (33... Rg8
$1 $19 {[%eval -337,25] ( -> ...Qg1+!)} 34. Be3 Qxb2) 34. Be3 {[%eval -187,29]}
({Only move:} 34. Bxf5 $15 {[%eval -47,27]} Bxf4 35. Bxf4 Qxb2 36. h4) 34...
Qg7 $2 {[%eval 22,27]} (34... Qxb2 $19 {[%eval -187,29]} 35. Rxf5 Qa1+ 36. Bg1
Rg8) 35. Rxf5 $11 Rg8 $2 {[%eval 204,25]} (35... Rxf5 $11 {[%eval 15,27]} 36.
Bxf5 Bxe3 37. Qxe3 Qxb2) 36. Rf7 $18 Qg6 {aiming for ...Bxe3.} 37. Rf6 $4 {
[%eval -359,27][%mdl 8192]} ({Not} 37. Rxa7 Be2 $11) (37. Bf2 $18 {[%eval 196,
28] and all is fine.}) 37... Be2 $1 $19 {[%cal Re2f3][%mdl 64] Deflection} 38.
Qxe2 Qxf6 39. Bf2 Bg7 40. Bg3 $2 {[%eval -450,25]} (40. Be6 {[%eval -273,28]}
Re8 41. b3) 40... Qxb2 {Black is clearly winning.} 41. Qxb2 Bxb2 42. d6 {[#]}
Rxg3 $1 43. hxg3 {[%mdl 4096] Endgame KB-KB} c4 44. Bc8 {[%eval -671,24]} (44.
Kg1 $142 {[%eval -434,28]} Kg7 45. d7) 44... Be5 {Hoping for ...c3.} 45. d7 Bc7
46. Ba6 c3 47. Bd3 a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 48. Kg2 a4 {Accuracy:
White = 45%, Black = 60%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "8"]
[White "Masculo, Jose Soares"]
[Black "Segal, Alexandru Sorin"]
[Result "1/2-1/2"]
[ECO "A30"]
[Annotator "Stockfish 16"]
[PlyCount "29"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 c5 5. O-O d6 6. d4 cxd4 7. Nxd4 Bxg2 8.
Kxg2 Qc8 ({RR} 8... g6 9. Nc3 Bg7 10. Qa4+ Qd7 11. Qxd7+ Kxd7 12. Rd1 Rc8 13.
b3 Nc6 14. Bb2 Nxd4 15. Rxd4 a6 16. Rd2 b5 17. e4 bxc4 18. e5 Ne8 19. Na4 Rab8
20. Re1 cxb3 21. exd6 exd6 22. axb3 Bf8 23. Bd4 {Ricardi,P (2547)-Granda
Zuniga,J (2599) Santiago de Chile 2005 1/2-1/2 (59)}) 9. b3 $146 ({RR} 9. Qb3
Nbd7 10. Nc3 g6 11. Nd5 Bg7 12. Rd1 Nxd5 13. cxd5 Qb7 14. f3 O-O 15. e4 Rac8
16. Be3 Bxd4 17. Bxd4 Rc7 18. Rac1 Rfc8 19. Qe3 Rc2+ 20. Rxc2 Rxc2+ 21. Rd2 Qc8
22. Bc3 {1/2-1/2 (22) Neisen,F (1295)-Anetsberger,C (1685) Nickenich 2012})
9... Nc6 10. Nc3 a6 11. Bb2 e6 12. Rc1 Nxd4 13. Qxd4 Qc5 14. Qxc5 dxc5 15. Rfd1
1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "8"]
[White "Sunye Neto, Jaime"]
[Black "Filguth, Rubens Alberto"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2360"]
[BlackElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "55"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 16,55,24,32,67,60,82,88,92,95,95,82,88,82,432,424,433,432,452,452,495,
492,501,478,523,532,535,530,569,568,571,568,574,567,581,592,601,596,606,604,
603,589]} 1. g3 {Marin,M} Nf6 2. Bg2 d5 3. Nf3 e6 4. O-O c5 5. c4 dxc4 6. Na3
Nc6 7. Nxc4 Be7 8. b3 O-O 9. Bb2 Bd7 {A13: English Opening: 1...e6.} ({RR} 9...
Nd5 10. d4 b5 11. Nce5 Nxe5 12. Nxe5 Bb7 $1 13. Rc1 Rc8 14. dxc5 ({RR} 14. Qd2
cxd4 15. Rxc8 Qxc8 16. Qxd4) 14... Bxc5 15. Qd3 ({RR} 15. Nd3 Be7 ({RR} 15...
Ne3 16. fxe3 Bxe3+ 17. Nf2 Bxc1 18. Bxc1 Bxg2 19. Kxg2 Qxd1 20. Rxd1 Rc2) (
15... Ne3 $5 16. fxe3 Bxe3+ 17. Rf2 Bxc1 18. Bxc1 (18. Bxb7 Bxb2 19. Nxb2 Qxd1+
20. Nxd1 Rc1 $15) 18... Bxg2 19. Kxg2 e5 $11) 16. Rxc8 Qxc8 17. Qa1 Nf6 18. Rc1
Qa8 $1 19. Rc7 Bxg2 20. Rxe7 Nd5 21. Rd7 Bh3 22. f3 f6 23. Nf2) 15... a6 16.
Rfd1 Qe7 ({RR} 16... f6) 17. e4 Nf6 18. Nd7 Nxd7 19. Qxd7 Bc6 20. Qxe7 Bxe7 21.
Rd2 Rfd8 22. Rxd8+ Bxd8 23. e5 Bd7 24. Rd1) 10. d4 cxd4 ({RR} 10... Rc8 11.
dxc5 Bxc5 12. Nd6 Rc7 ({RR} 12... Bxd6 13. Qxd6 Qe7 14. Qxe7 Nxe7 15. Ne5) 13.
Rc1 b6 ({RR} 13... Nb4 $2 {[%eval 470,28][%mdl 8192] 13...b6 0.78} 14. Rxc5
Rxc5 15. Nxb7) ({RR} 13... Bb6 $2 {[%eval 278,28] 13...b6 0.84} 14. Nb5 Rc8 15.
Ba3 Re8 16. Nd6) 14. Ng5 Qe7 15. Nge4 ({RR} 15. Bxf6 gxf6 ({RR} 15... Qxf6 {
[%eval 180,37] 15...gxf6 0.87} 16. Nge4 Qe5 17. Nxc5 bxc5 18. e3 {[%eval 121,
33]} (18. Ne4 $18 {[%eval 164,31]} Nb4 19. Qd2)) 16. Nb5 Rcc8 17. Ne4) 15...
Nxe4 16. Nxe4 Rd8 ({RR} 16... Bb4 $2 {[%eval 302,25] 16...Rfc8 0.64} 17. Be5 $1
{[%cal Re5c7]} Rcc8 18. Bd6 Bxd6 19. Nxd6 Rc7 20. Qd2) 17. Nxc5 bxc5 18. Qe1
Rcc8 19. Qc3 $1 {[%csl Gb2][%cal Rc3g7]} Nd4 20. Rfe1 $1 f6 {[%eval 156,28]} (
20... Bc6 $142 {[%eval 99,31]}) 21. e3 Nb5 {[%eval 246,24]} (21... Nc6 $16 {
[%eval 158,33] is a better defense.}) 22. Qa5 Be8 23. Red1 {[%eval 104,22]} ({
RR} 23. a4 Nd6 ({RR} 23... Nc7 {[%eval 367,23] 23...Qc7 2.43} 24. Qxa7) 24. Ba3
) (23. a4 $18 {[%eval 254,28]}) 23... Qc7 24. Qxc7 Rxd1+ 25. Rxd1 {Grischuk,A 
(2795)-Inarkiev,E (2688) Moscow 2014 CBM 164 [Marin,M] 1-0 (46)}) ({RR} 10...
b5 {[%eval 111,21] 10...Qc7 0.62} 11. Nce5 Nxe5 12. Nxe5 Rc8 13. Rc1 b4 14.
dxc5 Bxc5 15. Bb7 {[%eval 74,31]} ({RR} 15. Qd3 Qe7 16. Rfd1 Rfd8 {[%eval 152,
27]} (16... Rc7 $142 {[%eval 97,33]}) 17. Qa6 $1) (15. Bd4 $142 {[%eval 129,30]
} Bxd4 16. Qxd4 {[%mdl 64] Double Attack}) 15... Rc7 16. Bc6 Qe7 $1 17. Nxd7
Nxd7 18. Bg2) 11. Nxd4 Rc8 {White is better.} ({RR} 11... Nd5 12. Rc1 Nxd4 13.
Qxd4 {[%csl Gb2][%cal Rd4g7]} Bf6 14. Qd2 Bxb2 15. Qxb2 Qe7 16. Rfd1 Rfd8 17.
Bxd5 exd5 18. Qe5 Qxe5 19. Nxe5 Bb5 {[%eval 130,27]} (19... Be8 $142 {[%eval
76,31]}) 20. e3 {[%eval 3,31]} (20. Kf1 $1 $16 {[%eval 130,27]}) 20... f6 21.
Nd3 Bxd3 {[%eval 75,31]} (21... d4 $11 {[%eval 0,35]}) 22. Rxd3 Rd7 23. Rd4 {
[%eval 29,32]} (23. e4 $16 {[%eval 81,24]}) 23... Rad8 24. Kf1 Kf7 25. Ke2 Ke6
26. Kd3 {Terhuven,P (2174)-Stinka,J (2301) Marianske Lazne CZE 2023 1/2-1/2})
12. Rc1 $146 ({RR} 12. Nb5 {[%eval 45,27] 12.Rc1 0.91} a6 $1 13. Nbd6 Rc7 14.
Rc1) ({Predecessor:} 12. Nb5 a6 13. Nbd6 Rc7 14. Rc1 Bc8 15. Nxc8 Rxc8 16. e3
b5 17. Qxd8 Rcxd8 18. Bxc6 bxc4 19. Rxc4 {1-0 (39) Stein,L-Tarve,U Tallinn 1969
}) 12... a6 $146 ({RR} 12... Nxd4 13. Qxd4 Bc6 {[#]} 14. Rfd1 {[%eval 12,33] 1/
2-1/2 (14) Tal,M (2610)-Sokolov,A (2600) Reykjavik 1988} ({RR} 14. Rfd1 {
[%eval 17,31] 14.Bxc6 0.80}) ({RR} 14. Qxa7 {[%eval 10,34] 14.Bxc6 0.80} Ra8
15. Qe3 Bxg2 16. Kxg2 Qd5+ 17. Qf3 Qxf3+ 18. Kxf3 Rxa2) (14. Bxc6 $1 $16 {
[%eval 92,32]} Qxd4 15. Bxd4 Rxc6 16. a4)) ({RR} 12... Nxd4 13. Qxd4 Bc6 14.
Bxc6 $1 Qxd4 ({RR} 14... Rxc6 {[%eval 171,18] 14...Qxd4 0.86} 15. Qxa7) 15.
Bxd4 Rxc6 16. a4 $1 Ra8 ({RR} 16... b6 {[%eval 142,28] 16...Ra8 0.81} 17. Ne5
$1 {[%cal Re5c6]} Rxc1 18. Rxc1) ({RR} 16... a6 17. Na5 $1 {[%cal Ra5c6]} Rxc1
18. Rxc1 b5 19. Nc6) 17. Na5 $1 {[%cal Ra5c6]} Rxc1 18. Rxc1 b6 19. Nc6 Bf8 20.
b4) ({RR} 12... Nxd4 13. Qxd4 Bc6 14. Rfd1 {[%eval 13,38]} (14. Bxc6 $1 $16 {
[%eval 83,25]} Qxd4 15. Bxd4 Rxc6 16. a4) 14... Bxg2 15. Kxg2 Qd5+ {[%eval 68,
27]} (15... Qxd4 $11 {[%eval 19,30] was preferrable.} 16. Bxd4 Rfd8) 16. Qxd5
Nxd5 17. e4 Nf6 18. Bxf6 $1 Bxf6 19. e5 Bg5 20. f4 Bd8 21. Nd6 Rxc1 {[%eval
209,31]} (21... Rb8 $16 {[%eval 147,31]} 22. a4 Ba5) 22. Rxc1 b6 23. Nc8 a5 24.
a4 {[%eval 127,30]} (24. Rc6 $18 {[%eval 213,26]}) 24... h5 {[%eval 237,25]} (
24... g5 $16 {[%eval 127,30]} 25. Rc6 Kg7) 25. Rc6 g6 26. Kf3 Kh7 27. Ke4 {
Rodrigue-Lemieux,S (2216)-Zhu,B (1962) Toronto CAN 2018 1-0 (49)}) 13. Nxc6
Bxc6 14. Qxd8 Bxd8 $4 {[%eval 432,25][%mdl 8192] [#]} (14... Rfxd8 $16 {
[%eval 82,31] is tougher.} 15. Nb6 Rb8) 15. Ba3 $1 $18 {White is clearly
winning.} Bxg2 16. Kxg2 Re8 17. Nd6 $1 {[%csl Bb7,Bc8,Be8][%mdl 64] Double
Attack, Discovered Attack} Rb8 18. Nxe8 Nxe8 19. Rfd1 Nf6 20. Rc2 h5 21. Rdc1
Bb6 22. Rc8+ Rxc8 23. Rxc8+ {KRB-KBN} Kh7 24. Rb8 Ne4 25. Rxb7 {[%mdl 64]
Double Attack} Bxf2 26. Rb4 Bc5 27. Rxe4 Bxa3 28. Ra4 {Accuracy: White = 89%,
Black = 40%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "8"]
[White "Trois, Francisco R Torres"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "A14"]
[WhiteElo "2385"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "23"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. b3 O-O 7. Bb2 d5 8. d3 c5
9. e3 dxc4 10. dxc4 Nc6 11. Nc3 Qc7 12. Qe2 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "9"]
[White "Segal, Alexandru Sorin"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1-0"]
[ECO "E19"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "77"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 19,77,36,26,23,27,19,25,10,36,31,52,57,156,158,151,169,194,203,203,190,
165,169,174,169,161,177,185,191,222,183,211,204,222,206,203,218,205,139,448,
414,505,492,525,525,525,525,525,525,505,505,532,514,779,685,765,754,3420,3275,
716,726]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3
Ne4 8. Qc2 Nxc3 9. Qxc3 Be4 10. Bf4 d6 11. Qe3 {E19: Queen's Indian: Old Main
Line with 7...Ne4 8 Qc2 Nxc3 8 Qxc3.} Bb7 12. Rfd1 Nd7 13. b4 {White has an
edge.} Nf6 14. a4 Qd7 15. a5 b5 {[%eval 156,28] [#]} (15... a6 $14 {[%eval 57,
27]}) 16. Ne5 $1 $36 {[%cal Re5d7][%mdl 2048] Black is under strong pressure.}
dxe5 17. dxe5 {[%mdl 64] Discovered Attack} Qc8 {...Ng4 is the strong threat.}
18. exf6 Bxf6 19. Rac1 Bxg2 20. Kxg2 e5 {[#]} 21. Bg5 $1 ({But not} 21. Bxe5
Re8 $16) 21... Qb7+ 22. Kg1 Bxg5 23. Qxg5 Rae8 24. cxb5 Qxb5 25. Rxc7 Qxe2 26.
Qd2 Qxd2 $146 ({RR} 26... Qa6 27. Qd3 Qe6 {[%eval 304,24]} (27... Qxd3 {
[%eval 214,29] was necessary.} 28. Rxd3 Rb8) 28. Rxa7 e4 29. Qe3 Rd8 30. Rxd8
Rxd8 31. Qd4 Qe8 32. Qc5 Rc8 $2 {[%eval 578,25]} (32... e3 {[%eval 300,26]} 33.
Qxe3 Rd1+ 34. Kg2 Qc6+ 35. f3 g6) 33. Qe7 Qxe7 34. Rxe7 f5 35. a6 h5 36. a7 h4
37. Rb7 Kh7 38. Kg2 e3 39. fxe3 Rc2+ 40. Kf3 {1-0 (40) Szabo,L-Keres,P
Budapest 1952}) ({Predecessor:} 26... Qa6 27. Qd3 Qe6 28. Rxa7 e4 29. Qe3 Rd8
30. Rxd8 Rxd8 31. Qd4 Qe8 32. Qc5 Rc8 {1-0 (40) Szabo,L-Keres,P Budapest 1952})
27. Rxd2 $18 {[%mdl 4096] Endgame KRR-KRR} Rb8 28. Rb2 Rb5 $2 {[%eval 448,33]
[%mdl 8192]} (28... a6 $16 {[%eval 139,30] is tougher.} 29. Rc6 Ra8) 29. Rxa7
Rfb8 30. a6 {[%cal Ba5a6,Ba6a7][%mdl 32] White is clearly winning.} g6 31. Rc7
Kg7 32. a7 Ra8 33. Rd2 Rxb4 34. Rdd7 Kf6 35. Rxf7+ {[%mdl 64] Double Attack}
Kg5 {[%eval 779,29]} (35... Ke6 $142 {[%eval 514,33]} 36. Rxh7 Ra4) 36. Rc5
Rb1+ 37. Kg2 Re1 38. Rxe5+ {[%mdl 64] Remove Defender, Decoy} Rxe5 39. f4+ {
[%mdl 64] Double Attack. Accuracy: White = 87%, Black = 52%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "9"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Masculo, Jose Soares"]
[Result "0-1"]
[ECO "B56"]
[WhiteElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "80"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 13,80,12,11,-7,1,7,5,6,12,6,13,-46,-1,-47,-52,-169,-173,-253,-250,-259,
-253,-245,-204,-256,-250,-241,-242,-273,-269,-274,-261,-273,-274,-264,-254,
-253,-257,-319,-319,-380,-367,-421,-421,-497,-492,-477,-503,-544,-535,-573,
-539,-599,-622,-599,-616,-633,-633,-550,-554,-609,-638,-646,-667,-625,-601,
-718,-692,-777,-777]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6.
f4 e5 7. Nxc6 bxc6 8. fxe5 {B56: Classical Sicilian: Unusual Lines.} dxe5 9.
Qxd8+ Kxd8 10. Bc4 {The position is equal.} Bb4 ({RR} 10... Ke7 11. Bg5 Be6 12.
Bxe6 Kxe6 13. O-O-O Be7 14. Rhf1 Rad8 15. h3 Rxd1+ 16. Rxd1 Nh5 17. Bxe7 Kxe7
18. Rd3 {[%eval -70,29]} ({Better is} 18. Ne2 $11 {[%eval 0,40]}) 18... Nf4 19.
Rg3 {[%eval -176,27]} (19. Rd2 $17 {[%eval -80,32]}) 19... g6 20. Kd2 Nh5 {
[%eval -43,27]} (20... Rd8+ $19 {[%eval -164,25]} 21. Ke3 h5) 21. Rf3 Rd8+ 22.
Ke3 Nf6 23. Rf2 Rb8 24. b3 Rb6 25. Rd2 {Kher,A-Rachuri,A chess.com INT 2021 1/
2-1/2 (65)}) 11. O-O $146 ({Predecessor:} 11. Bd2 Ke7 12. O-O-O Bg4 13. Rde1
Rab8 14. Rhf1 Rhd8 15. h3 Be6 16. Bxe6 Kxe6 17. a3 {1/2-1/2 (39) Bazan,O (2290)
-Belmonte,D Buenos Aires 1976}) 11... Ke7 12. Bd2 $146 {[%eval -46,24]} ({RR} 
12. Bg5 Be6 13. Bd3 {[%eval -61,23]} (13. Bxe6 $11 {[%eval 0,34]} Kxe6 14. Bxf6
gxf6 15. Rf3) 13... Bxc3 14. bxc3 Rhb8 15. a3 a5 16. Rfb1 Kd6 17. Bxf6 gxf6 18.
Rf1 Ke7 19. Rfb1 h5 20. Kf2 h4 21. Ke3 Kd6 22. Rf1 Rg8 23. Kf2 Rab8 {[%eval
-51,34]} ({Black should play} 23... Rg5 $17 {[%eval -126,26]} 24. Rad1 Kc5) 24.
Rab1 Kc5 25. Rfd1 Rxb1 26. Rxb1 f5 {Astengo,C (2150)-Caposciutti,M (2316)
Genova 2000 0-1 (33)}) ({White should try} 12. Na4 $11 {[%eval 13,31]}) 12...
Rd8 13. Be1 (13. Nd5+ $5 Nxd5 14. Bxb4+ Nxb4 15. Rxf7+ Ke8 16. Rxg7 $11) 13...
Be6 $36 {[%mdl 2048] White is under pressure.} 14. Bxe6 {[%eval -169,23]} (14.
Bd3 $15 {[%eval -52,29]}) 14... Kxe6 $19 15. Na4 {[%eval -253,23]} (15. Bh4 {
[%eval -173,29] was called for.}) 15... Be7 16. Bh4 Rd4 (16... Nxe4 17. Bxe7
Kxe7 18. Rae1 $11) 17. Nc3 Rd2 ({Not} 17... Nxe4 18. Bxe7 Kxe7 19. Rfe1 $17)
18. Rac1 {[#]} Rb8 $1 19. Bg5 Rd4 20. b3 Nxe4 21. Nxe4 Rxe4 22. Bxe7 Kxe7 23.
Rce1 Rxe1 24. Rxe1 {[%mdl 4096] Endgame KR-KR} f6 25. Kf2 Rd8 26. Ke3 Ke6 27.
a4 f5 {Black is clearly winning.} 28. a5 f4+ 29. Ke2 e4 30. g3 g5 31. h4 h6 32.
hxg5 hxg5 33. Rh1 Ke5 34. Rh7 e3 35. gxf4+ gxf4 {And now ...Rd2+ would win.}
36. Kf3 Rd1 37. Re7+ Kf6 38. Re8 Rf1+ 39. Kg4 {and the idea b4 leaves White
hopeful.} Rf2 40. b4 {intending c4.} e2 {Accuracy: White = 44%, Black = 92%.}
0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "9"]
[White "Filguth, Rubens Alberto"]
[Black "Trois, Francisco R Torres"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "2350"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "106"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 12,106,55,22,23,26,21,0,19,18,20,20,26,24,19,-3,0,0,0,0,7,9,16,0,18,14,
36,36,37,36,34,32,35,28,53,39,46,34,35,36,43,17,23,18,50,50,57,20,22,10,11,0,0,
1,3,3,29,12,13,14,7,9,24,6,6,-4,-2,-4,-6,-10,-7,-10,15,-7,23,3,3,0,1,1,61,3,3,
2,6,0,0,0,0,0,0,-29979,-29980,-29980,-29981,-29981,-29982]} 1. e4 g6 2. d4 Bg7
3. Nf3 d6 4. Be2 Nf6 5. Nc3 O-O 6. O-O Nc6 7. Bg5 h6 {B08: Pirc Defence:
Classical System.} 8. Bf4 Bg4 9. Qd2 Kh7 {The position is equal.} 10. Rad1 $146
({Predecessor:} 10. Be3 e5 11. d5 Ne7 12. Rad1 Nd7 13. Ng5+ hxg5 14. Bxg4 f5
15. exf5 gxf5 16. Be2 {1-0 (38) Kopylov,I-Zhukhovitsky,S Kuibyshev 1970}) 10...
Bxf3 11. Bxf3 e5 12. dxe5 dxe5 13. Qc1 $146 ({RR} 13. Be3 Qe7 14. Nd5 Nxd5 15.
Qxd5 Rfd8 16. Qb3 b6 17. c3 Na5 18. Qa4 Qe6 19. Be2 Bf8 20. Bc1 c5 21. Qc2 {
[%eval 2,29]} (21. Bb5 $16 {[%eval 104,27]}) 21... Qxa2 22. Rd5 Rxd5 23. exd5
Rd8 24. Bf3 f5 25. g4 e4 26. Bg2 Qxd5 27. gxf5 gxf5 {Beyer,C-Hoersch,H
Wuerttemberg 1991 0-1 (73)}) 13... Qe7 14. Be3 Rad8 15. Ne2 Na5 16. b3 ({
But not} 16. Bxa7 $2 b6 $19) 16... b6 17. Ng3 Rxd1 (17... h5 {looks sharper.}
18. Bg5 Nb7 19. Be2 Rxd1 20. Rxd1 Rd8) 18. Rxd1 Rd8 19. Rxd8 Qxd8 20. Be2 h5
21. f3 Qd6 22. Nf1 Ng8 23. Qd2 Nb7 24. Qc3 Bh6 25. Bf2 Ne7 26. Qc4 Nd8 27. b4
c6 28. a4 Ne6 29. c3 Kg7 30. g3 c5 31. b5 h4 32. Kg2 hxg3 33. hxg3 Bg5 34. Qb3
f5 35. Bc4 Nf8 {[%cal Be6f8,Bf8d7,Bd7f6][%mdl 32]} 36. Qc2 Nd7 37. Qe2 Nf6 38.
f4 Bh6 39. exf5 exf4 40. Qe6 Qxe6 41. fxe6 Nfd5 42. gxf4 Nxc3 43. Be1 Ne4 44.
Kf3 Nd6 45. Ne3 Kf8 {[%eval 61,30]} ({Better is} 45... Nxc4 $11 {[%eval 1,35]}
46. Bc3+ Kg8 47. Nxc4 Bg7) 46. Bd3 {[%eval 3,31]} (46. Ba2 $1 $14 {[%eval 61,
30]}) 46... Bg7 $11 47. Bh4 Nef5 48. Bxf5 Nxf5 49. Nxf5 gxf5 {KB-KB} 50. Bd8 {
Bxb6! is the strong threat.} Ke8 51. Bxb6 $2 {[%eval -32725,27][%mdl 8192] [#]}
(51. Bc7 $11 {[%eval 0,68]}) 51... axb6 {[%cal Ba7b6,Bb6a5][%mdl 32] Black
mates.} 52. a5 bxa5 53. b6 Bf8 {Accuracy: White = 62%, Black = 79%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "9"]
[White "Camara, Helder"]
[Black "Sunye Neto, Jaime"]
[Result "1/2-1/2"]
[ECO "A47"]
[WhiteElo "2325"]
[BlackElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "189"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. Bf4 Bb7 4. e3 e6 5. Bd3 c5 6. c3 Nc6 7. O-O Be7 8. h3
O-O 9. Nbd2 cxd4 10. exd4 d6 11. Qe2 Re8 12. Rad1 ({RR} 12. Rfe1 Qd7 13. a4 Bf8
14. Bg3 g6 15. Nc4 Na5 16. Ne3 Nh5 17. Bh2 Bh6 18. Bb5 Bc6 19. b4 Nb7 20. Ba6
Nd8 21. c4 Bf4 22. Bxf4 Nxf4 23. Qd1 Qe7 24. d5 Bb7 25. Bxb7 Nxb7 26. dxe6 fxe6
{Sargsyan,S (2640)-Sahidi,S (2505) Teplice CZE 2023 1-0 (48)}) ({RR} 12. Ne4
Nxe4 13. Qxe4 g6 14. Bh6 Bf6 15. Rad1 a6 16. Rfe1 Na5 17. Qg4 Bxf3 18. Qxf3 d5
19. Re2 b5 20. a3 Bg7 21. Bf4 Rc8 22. Qg3 Bf6 23. Rde1 Nc4 24. Bh6 a5 25. Qg4
b4 26. axb4 axb4 {Anand,V (2030)-Smirnov,A (2418) Djenovici MNE 2023 0-1 (31)})
12... Qd7 13. Rfe1 a6 14. Ne4 $146 ({RR} 14. a4 g6 15. Nc4 Nd5 16. Bh6 b5 17.
axb5 axb5 18. Ne3 Nxe3 19. Qxe3 Na5 20. Ng5 Nc4 21. Qf4 Bxg5 22. Qxg5 f5 23.
Re2 Bc6 24. Rde1 Qf7 25. Qg3 Rad8 26. h4 Nb6 27. h5 Nd5 28. Bg5 Rd7 {Kosic,D 
(2497)-Draskovic,L (2419) Podgorica 2014 1/2-1/2 (58)}) ({RR} 14. Bb1 b5 15.
Ne4 Na5 16. Nfg5 {1/2-1/2 (16) Becker,C (1840)-Savchenko,A (2074) Willingen
2006}) 14... Nxe4 15. Qxe4 g6 16. Qe3 b5 17. Qe2 Bf8 18. Ng5 Ne7 19. Ne4 Bxe4
20. Bxe4 d5 21. Bd3 Nc6 22. a3 Bd6 23. Qg4 Na5 24. h4 Nc4 25. Re2 h5 26. Qg3
Bxf4 27. Qxf4 Qd6 28. Qg5 Kg7 29. Rde1 Qd8 30. Qg3 Qf6 31. f4 Rec8 32. Bb1 a5
33. Rf2 Nd6 34. Re5 Kf8 35. Re1 b4 36. f5 Nxf5 37. Bxf5 exf5 38. Re5 bxc3 39.
bxc3 Rab8 40. Rxd5 Rb1+ 41. Rf1 f4 42. Qh3 Rcb8 43. Rxa5 Rxf1+ 44. Kxf1 Rb1+
45. Kf2 Rb2+ 46. Kg1 Re2 47. Re5 Rxe5 48. dxe5 Qxe5 49. a4 Qc5+ 50. Kh1 Qc6 51.
a5 Qa6 52. Qd7 Qxa5 53. Qd6+ Kg8 54. Qxf4 Qxc3 55. g3 Kg7 56. Qd6 Qf3+ 57. Kh2
Qf2+ 58. Kh1 Qf6 59. Qc7 Qd4 60. Kh2 Kf6 61. Qc6+ Ke7 62. Qc7+ Ke6 63. Qb8 Qf2+
64. Kh1 Qe1+ 65. Kh2 Qe2+ 66. Kh1 Qe5 67. Qf8 Qd5+ 68. Kh2 Kf5 69. Qe7 Qa2+ 70.
Kh3 Qe6 71. Qb7 Ke5+ 72. Kh2 Qa2+ 73. Kh3 Kd4 74. Qf3 Qd5 75. Qd1+ Ke5 76. Qe2+
Qe4 77. Qb2+ Kd5 78. Kh2 Qf5 79. Qd2+ Kc4 80. Qc1+ Kb3 81. Qe3+ Kb2 82. Qe7
Qf2+ 83. Kh3 Kc2 84. Qe4+ Kc3 85. Qe5+ Kc4 86. Qe4+ Kb3 87. Qd3+ Kb2 88. Qb5+
Kc3 89. Qa5+ Kc4 90. Qa4+ Kd5 91. Qd7+ Ke4 92. Qe7+ Kd3 93. Qa3+ Ke2 94. Qa6+
Ke1 95. Qa1+ 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "9"]
[White "Carvalho, Herbert Abreu"]
[Black "Pimenta, Jeronimo Marques"]
[Result "1-0"]
[ECO "A96"]
[WhiteElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "77"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 17,77,29,62,33,47,15,14,12,16,0,25,0,7,10,59,47,357,353,354,358,348,252,
232,117,125,119,218,167,160,159,210,186,280,286,300,264,275,269,270,259,364,
367,369,374,364,339,500,482,583,593,573,424,472,448,415,374,375,358,526,526,
638,630]} 1. Nf3 e6 2. c4 f5 3. g3 Nf6 4. Bg2 d6 5. d4 Be7 6. O-O O-O 7. Nc3
Ne4 8. Qc2 Nxc3 9. Qxc3 Bf6 10. b3 {A96: Classical Dutch: Fluid Systems: Early
deviations.} Nc6 11. Bb2 e5 $146 ({Predecessor:} 11... Bd7 12. Rad1 Qe8 13. Qd2
Qh5 14. Rfe1 Ne7 15. Ne5 Bc8 16. Nd3 Bg5 17. f4 Bf6 {1-0 (45) Suetin,
A-Rashkovsky,N Sochi 1973}) 12. dxe5 {The position is equal.} dxe5 {And now ...
e4 would win.} 13. Qc2 ({RR} 13. Rad1 Qe7 14. Qc1 a5 15. Rfe1 e4 16. Nd4 Ne5
17. f4 Nf7 18. c5 c6 19. Qc4 {[%eval -14,30]} ({White should play} 19. Bf1 $16
{[%eval 71,29]}) 19... Rd8 20. a3 h5 21. e3 Kh7 22. b4 Nh6 23. Qe2 h4 24. Bc3 {
[%eval -135,23]} (24. Rd2 $142 {[%eval -79,24]}) 24... axb4 25. axb4 Qf7 26.
Ra1 Be6 27. Rxa8 {[%eval -231,26]} (27. Bf1 $17 {[%eval -139,27]}) 27... Rxa8 {
Iruzubieta Villaluenga,J (2408)-Lin,Y (2378) Zahara de la Sierra ESP 2023 0-1 
(33)}) 13... Qe7 14. Rad1 e4 $146 ({RR} 14... a5 15. e4 fxe4 {[%eval 98,24]} (
15... f4 $11 {[%eval -5,28] keeps the balance.}) 16. Qxe4 g6 17. Rfe1 Bf5 18.
Qd5+ Be6 {[%eval 244,21]} (18... Qf7 $16 {[%eval 140,29]} 19. Qxf7+ Kxf7) 19.
Qb5 Nb4 20. Bxe5 Nxa2 {[%eval 385,23]} (20... c6 $142 {[%eval 236,28]} 21. Bd6
Qxd6 22. Rxd6 cxb5) 21. Qxb7 Rab8 22. Qe4 Rxb3 23. Bxf6 Rxf6 24. Nd4 Nc3 25.
Qa8+ Rf8 26. Qc6 $2 {[%eval -152,31]} ({Only move:} 26. Qxa5 $18 {[%eval 398,
26]} Ra3 27. Qe5 Nxd1 28. Rxd1) 26... Nxd1 $2 {[%eval 464,26]} (26... Rb6 $17 {
[%eval -152,31] and life is bright.} 27. Rxe6 Qf7) 27. Nxb3 {1-0 (27) Royal,S 
(2243)-Jamieson,I (1872) lichess.org INT 2022}) 15. Nd4 Ne5 16. Nb5 e3 $2 {
[%eval 357,25][%mdl 8192]} (16... Re8 $14 {[%eval 47,28]}) 17. f4 $18 ({
Stronger than} 17. fxe3 Ng4 $11) 17... Ng4 18. Ba3 c5 19. Rd5 b6 {[#]} 20. Rxc5
{[%eval 117,25]} (20. Nd6 $1 $18 {[%eval 232,24]}) 20... bxc5 $16 21. Bxa8 a6 {
[%eval 218,22]} (21... Rd8 $16 {[%eval 119,23]}) 22. Bd5+ Kh8 23. Nc3 Bd4 {[#]}
24. Bf3 $1 Bb7 {[%eval 280,18]} (24... Qf6 {[%eval 186,20] was worth a try.})
25. Nd5 $18 Qe6 26. Bb2 Nf2 27. b4 Bxd5 28. cxd5 ({Resist} 28. Bxd5 $6 Qb6 $18)
28... Qb6 {[%eval 364,24]} (28... Qf6 {[%eval 259,30] is a better defense.} 29.
Bxd4 (29. bxc5 Bxb2 30. d6 Ba3 $18) 29... cxd4) 29. Bxd4 cxd4 30. Qc5 {[%cal
Rc5f8]} Qf6 31. Rc1 Re8 {[%eval 500,25]} (31... Ne4 $142 {[%eval 339,29]} 32.
Bxe4 fxe4) 32. Qc6 Qd8 33. d6 h6 34. Qxa6 {Qb5 is the strong threat.} Ne4 35.
Bh5 Rf8 36. Rd1 Qf6 37. Qa7 Nd2 {[%eval 526,26]} (37... d3 {[%eval 358,28] was
called for.} 38. exd3 Nxd6 39. Qxe3 Ra8) 38. Qe7 g6 {[#]} 39. Bxg6 $1 {[%mdl
512] Accuracy: White = 67%, Black = 37%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "9"]
[White "Braga, Cicero Nogueira"]
[Black "Ary, Edgar Nadra"]
[Result "1-0"]
[ECO "B30"]
[Annotator "Stockfish 16"]
[PlyCount "117"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 11,117,39,43,41,69,64,85,86,84,82,172,164,148,137,154,60,68,67,70,25,22,
17,16,10,14,17,52,22,31,0,30,0,0,3,64,65,53,32,50,51,85,75,107,107,101,104,103,
92,92,89,101,111,112,104,204,135,126,117,132,110,142,88,95,75,80,40,53,34,184,
221,196,205,180,166,186,164,157,82,116,111,103,108,96,96,629,627,758,728,758,
748,3362,790,29973,29974,29979,29980,29983,29984,29984,29985,29985,29986,29986,
29987,29987,29988,29991,29983]} 1. e4 c5 2. Nf3 d6 3. Nc3 e5 4. Bc4 Be6 5. d3
Be7 6. O-O Nc6 $146 ({Predecessor:} 6... Nd7 7. Nd5 Ngf6 8. Ne3 Nb6 9. Bb3 O-O
10. Qe2 h6 {1/2-1/2 (10) Benko,P-Bronstein,D Las Palmas 1972}) 7. Nd5 {B30:
Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} h6 ({RR} 7... Nf6 8. c3 O-O 9.
Nxf6+ Bxf6 10. Bxe6 fxe6 11. Be3 b5 12. b4 cxb4 13. cxb4 Qd7 14. Qb3 a5 15.
bxa5 Nxa5 16. Qb2 Rfb8 17. Rac1 b4 18. Rfd1 Qa4 19. Qc2 Nb7 20. Qc4 Qxa2 21.
Qxb4 Nc5 22. Qe1 {Kryvoruchko,Y (2598)-Krasenkow,M (2660) Ustron 2007 1/2-1/2})
({RR} 7... Nf6 8. c3 O-O 9. h3 h6 {[%eval 52,26]} (9... Bxd5 $11 {[%eval -4,31]
} 10. Bxd5 Nxd5 11. exd5 Nb8) 10. Be3 Qd7 11. Kh2 Bd8 12. Nxf6+ Bxf6 13. b3
Rfd8 14. Bxe6 Qxe6 15. c4 Be7 16. Ng1 f5 17. exf5 Qxf5 18. Qe2 {[%eval -65,28]}
(18. Ne2 $1 $11 {[%eval 0,30]}) 18... d5 19. cxd5 {[%eval -174,25]} (19. Kh1
$15 {[%eval -57,28]}) 19... Rxd5 20. Rad1 Rad8 21. Nf3 Rxd3 22. Rxd3 {
Vakhlamov,I (2413)-Le Tuan Minh (2514) chess.com INT 2022 0-1 (58)}) 8. c3 a6
$146 ({RR} 8... Nf6 9. Qb3 {[%eval 0,27]} (9. Ne1 $14 {[%eval 57,26]}) 9... Qc8
10. Nxe7 Nxe7 11. Bxe6 fxe6 12. Re1 Ng6 13. d4 O-O 14. dxc5 dxc5 15. Qc4 Qc6
16. a4 b6 17. b4 Rac8 18. b5 $1 {[%cal Rb5c6]} Qe8 19. a5 Rc7 20. axb6 axb6 21.
Ra6 Rb7 22. Rd1 Qe7 23. h3 {Zakharov,A (2405)-Pligin,G (1897) Taganrog 2010
1-0 (57)}) ({RR} 8... Nf6 9. d4 exd4 10. cxd4 Bxd5 {[%eval 80,28]} (10... cxd4
$11 {[%eval 6,29]} 11. Nxd4 Bxd5 12. exd5 Nxd4 13. Qxd4 O-O) 11. exd5 Na5 $2 {
[%eval 257,28]} (11... Nxd4 $16 {[%eval 76,29] might work better.} 12. Nxd4
cxd4) 12. Bb5+ Kf8 13. dxc5 dxc5 14. Bd2 $1 Nxd5 15. Bxa5 Qxa5 16. Qxd5 Qxb5
17. Ne5 {[%csl Ge5][%cal Rd5f7]} Qe8 18. Rfe1 Rd8 19. Qxb7 Kg8 $2 {[%eval 557,
25]} (19... h5 {[%eval 219,30] is more resistant.} 20. Re3 Rh6) 20. Nc6 Rd7 21.
Nxe7+ Kh7 22. Qe4+ g6 23. Nd5 {Durarbayli,V (2163)-Mahmoody,M (2232) Teheran
2006 1-0 (60)}) 9. d4 {White is better.} cxd4 10. cxd4 Bg4 {[%eval 172,24]} (
10... exd4 $16 {[%eval 82,30]} 11. Nxd4 Nxd4) 11. dxe5 $18 Nxe5 {White must
now prevent ...Bxf3.} 12. Be2 Bxf3 13. Bxf3 {[%eval 60,28]} (13. gxf3 $16 {
[%eval 154,26] Threatens to win with Be3.} Nf6 14. Be3) 13... Nf6 $14 14. Be2
O-O 15. Nxf6+ ({Much weaker is} 15. Nxe7+ $6 Qxe7 16. Re1 Rae8 $11) 15... Bxf6
16. Qb3 Qe7 17. Be3 Rac8 18. Rac1 Rc6 19. Qd5 Rfc8 20. Rxc6 (20. b3 {is more
complex.} Nd7 21. g3 Bb2 22. Rxc6 Rxc6 23. Qd1) 20... Rxc6 (20... Nxc6 {
with more complications.} 21. Bg4 Re8 22. b3 Bg5 23. Bxg5 hxg5 24. h3 Qxe4 25.
Qxg5 Qc2) 21. Rc1 Qc7 22. Rxc6 Qxc6 {[%eval 64,31]} ({Black should play} 22...
Nxc6 $11 {[%eval 3,34]} 23. Qd2 Qe7) 23. Qxc6 Nxc6 $11 {[%mdl 4096] Endgame
KBB-KBN} 24. Bc1 Nb4 25. Bd2 Nc6 26. b3 Kf8 27. Bc4 Ke7 28. Bd5 Bd4 29. Kf1 f6
30. f4 Kd7 31. Ke2 Kc7 32. Kf3 Kb6 {[%eval 204,27]} (32... Ne7 $16 {[%eval 104,
31]}) 33. Kg4 Ne7 34. Bb4 Kc7 35. Bf7 b6 36. Bc4 a5 37. Bd2 Kc6 38. Bf7 Kc5 39.
a3 {[%cal Ba2a3,Ba3a4][%mdl 32]} Bb2 {[%eval 184,31]} (39... Bg1 $1 $14 {
[%eval 34,30]}) 40. Be3+ $18 Kc6 41. a4 Bc3 42. Kf3 f5 43. Be8+ Kc7 44. h3 {
[%eval 82,34]} (44. Bf7 $142 {[%eval 157,37]}) 44... Ba1 45. Bf2 fxe4+ 46. Kxe4
d5+ 47. Kd3 Nc6 $2 {[%eval 629,27][%mdl 8192] [#]} (47... Bf6 $16 {[%eval 96,
30]}) 48. Bxc6 $1 Kxc6 49. Bd4 Bxd4 50. Kxd4 {KP-KP} b5 51. f5 bxa4 52. bxa4 {
White mates.} h5 53. g4 h4 54. g5 Kd6 {[#]} 55. g6 $1 Ke7 56. Kxd5 Kf6 57. Ke4
Ke7 58. Ke5 Kf8 59. Kf4 {Accuracy: White = 72%, Black = 51%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "10"]
[White "Sunye Neto, Jaime"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[ECO "E93"]
[WhiteElo "2360"]
[BlackElo "2375"]
[Annotator "Stockfish 16"]
[PlyCount "49"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 {Zakhartsov,Vi} Nf6 2. Nf3 g6 3. Nc3 Bg7 4. d4 O-O 5. e4 d6 6. Be2 e5 7.
d5 Nbd7 ({RR} 7... a5 8. h3 Na6 9. Bg5 h6 10. Be3 Nc5 11. Nd2 c6 12. a3 Na6 13.
b4 Bd7 14. Rb1 axb4 15. axb4 c5 16. bxc5 Nxc5 17. Bxc5 dxc5 18. Rxb7) 8. Be3
Ng4 9. Bd2 Bh6 ({RR} 9... f5 10. Ng5 Nc5 11. b4 ({RR} 11. exf5 gxf5 12. b4 e4 (
{RR} 12... Na6 13. O-O Qf6 ({RR} 13... Nxb4 14. Bxg4 h6 ({RR} 14... fxg4 15.
Qb1) 15. Ne6 Bxe6 16. dxe6 fxg4 17. Qxg4) 14. c5 dxc5 15. b5 Nb8 16. Qb3 Kh8
17. Ne6 Bxe6 18. dxe6) 13. bxc5 e3 14. Nh3 ({RR} 14. fxe3 Qxg5 15. Bxg4 Bxc3
16. Bxc3 Qxe3+ 17. Be2 Qxc3+) 14... Qh4 ({RR} 14... exd2+ 15. Qxd2 dxc5) 15.
O-O exd2 16. Qxd2 f4 17. Bxg4 Bxg4 18. f3 Bxh3 19. gxh3 dxc5) ({RR} 11. O-O h6
({RR} 11... a5 12. exf5 gxf5 13. f3 Nf6 14. Be3 h6 15. Nh3 Qe7 16. Qd2 Kh7 17.
Nf2) 12. b4 hxg5 ({RR} 12... Na6 13. Ne6 Bxe6 14. dxe6 Nf6 15. exf5 gxf5 16.
Nd5) 13. bxc5 dxc5 14. exf5 gxf5 15. Bxg4 fxg4 16. Ne4 b6 17. Bxg5) 11... fxe4
12. Ncxe4 ({RR} 12. O-O e3 13. Bxg4 Qxg5 14. Bxc8 ({RR} 14. Bxe3 Qxg4 15. Qxg4
Bxg4 16. bxc5 dxc5 17. Bxc5 Rf4) 14... exd2 15. bxc5 Raxc8 16. Ne4 Qf5 17. Qe2
dxc5) 12... Nxe4 13. Nxe4 Bf5 14. Bxg4 ({RR} 14. Bg5 Qc8 15. Bxg4 Bxg4 16. f3
Bf5 17. O-O) 14... Bxe4 15. O-O Bd3 16. Be2 ({RR} 16. Re1 Bxc4 17. Be6+ Kh8 18.
Qc2 b5) 16... e4 17. Rc1 Bb2 18. Bxd3 Bxc1 19. Bxc1 exd3 20. Qxd3 ({RR} 20. Bb2
h5 21. Qxd3 Kh7 22. Qc3 Qd7 23. Re1 Rae8 24. Re6 Rxe6 25. dxe6 Qe7 26. c5 dxc5
({RR} 26... Rg8 27. cxd6 cxd6 28. h4) 27. bxc5 Rg8 28. Qe5) 20... Qf6 21. Qd2
Rae8 22. Bb2 Qf4 23. Qc3 Re5 24. c5 {Zakhartsov,V (2576)-Kryakvin,D (2574)
Armavir 2010 CBM 135 Extra [Zakhartsov,Vi] 1/2-1/2 (84)} ({RR} 24. g3 Qe4 25.
Qc1 Re7 26. Qc3 Kf7)) ({RR} 9... f5 10. Ng5 Ndf6 11. h3 Nh6 12. Qc2 Nf7 13. Ne6
Bxe6 14. dxe6 Nh6 15. Bxh6 Bxh6 16. exf5 gxf5 17. Qxf5 Qe7 18. O-O Rae8 19. Nd5
Qg7 20. Bh5 Nxh5 21. Qxh5 Rxe6 22. Rae1 Rg6 23. g3 Rg5 24. Qh4 {Bjelobrk,I 
(2405)-Mikaelyan,A (2504) chess.com INT 2023 1-0 (53)}) 10. Bxh6 $146 ({RR} 10.
h3 Bxd2+ 11. Qxd2 Ngf6 12. O-O Nc5 13. Qc2 a5 14. Ne1 Bd7 15. Nf3 Nh5 16. Rfe1
Nf4 17. Bf1 f5 18. Kh2 Qf6 19. Nd2 Qg5 20. Re3 Kh8 21. Rae1 Qh6 22. exf5 gxf5
23. g3 Ng6 24. Bg2 {0-1 (24) Belov,I (2390)-Chigaev,M (2551) Sochi 2016}) 10...
Nxh6 11. Qd2 Kg7 12. h4 a5 13. h5 Rh8 14. O-O-O f6 15. hxg6 hxg6 16. Ne1 Nc5
17. Nd3 Nxd3+ 18. Bxd3 Bd7 19. Bc2 Nf7 20. Ba4 Bxa4 21. Nxa4 Rxh1 22. Rxh1 Qd7
23. Nc3 Rh8 24. Rxh8 Kxh8 25. f3 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "10"]
[White "Masculo, Jose Soares"]
[Black "Carvalho, Herbert Abreu"]
[Result "1/2-1/2"]
[ECO "A36"]
[BlackElo "2265"]
[Annotator "Stockfish 16"]
[PlyCount "61"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. g3 c5 2. Bg2 Nc6 3. c4 g6 4. Nc3 Bg7 5. e3 d6 6. Nge2 h5 7. h4 ({RR} 7. h3
Nh6 8. d3 Nf5 9. b3 Bd7 10. Bb2 a6 11. Qd2 Rb8 12. Ne4 e5 13. N4c3 b5 14. Nd5
Nfe7 15. Nec3 O-O 16. O-O h4 17. g4 f5 18. gxf5 Bxf5 19. e4 Bd7 20. Qg5 b4 21.
Ne2 Nxd5 {Gurevich,M (2667)-Minasian,A (2595) New Delhi/Teheran 2000 1/2-1/2 
(54)}) 7... Nh6 ({RR} 7... Bg4 8. f3 Be6 9. b3 Nh6 10. Nf4 Nf5 11. Nxe6 fxe6
12. Kf2 Be5 13. f4 Bxc3 14. dxc3 Qa5 15. Bxc6+ bxc6 16. Qd3 O-O 17. Rg1 Rf6 18.
g4 hxg4 19. Rxg4 Kf7 20. Bd2 Rh8 21. b4 Qa3 22. bxc5 {Rangel,D (2220)-Wagner,D
(2584) chess.com INT 2023 0-1 (48)}) 8. d3 Nf5 9. b3 $146 ({RR} 9. a3 a5 10.
Rb1 Bd7 11. b3 Rb8 12. Bb2 Ne5 13. e4 Nd4 14. Nxd4 cxd4 15. Ne2 Nc6 16. a4 e5
17. Bc1 O-O 18. O-O f5 19. Bg5 Qe8 20. Qd2 Nb4 21. Rbe1 b6 22. f4 Bc6 23. Nc1
Na6 {Molchanov,A (2147)-Yarmysty,M (2286) Alushta 2007 0-1 (48)}) ({RR} 9. a3
Bd7 10. Rb1 Rb8 11. b4 Ne5 12. bxc5 Bc6 13. Bxc6+ bxc6 14. Rxb8 Qxb8 15. cxd6
Qxd6 16. Nf4 Nxd3+ 17. Qxd3 Qxd3 18. Nxd3 Bxc3+ 19. Bd2 Bf6 20. Ke2 Nd6 21. c5
Nc4 22. a4 Kd7 23. Rb1 Kc7 {Ketola,K-Sihvonen,T (2160) Finland 1998 1/2-1/2 
(32)}) 9... Qd7 10. Bb2 b6 11. Qd2 Bb7 12. Nf4 Ne5 13. Ne4 O-O 14. O-O b5 15.
a4 bxc4 16. bxc4 Bc6 17. a5 Rab8 18. Rab1 Rb3 19. Ba1 Rfb8 20. Qa2 Rxb1 21.
Rxb1 Qc7 22. Bc3 Nxd3 23. Rxb8+ Qxb8 24. Nxd3 Bxe4 25. Bxe4 Bxc3 26. Bxf5 gxf5
27. Nf4 e6 28. Qa4 a6 29. Qc6 Bxa5 30. Qxa6 Bc3 31. Nxh5 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "10"]
[White "Rocha, Antonio Cavilhas"]
[Black "Braga, Cicero Nogueira"]
[Result "0-1"]
[ECO "E99"]
[WhiteElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "66"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 24,66,60,53,58,34,67,0,4,6,-8,-72,-68,-111,-27,-46,-41,-33,0,-41,-22,
-44,-43,-280,-312,-314,-316,-314,-297,-305,-290,-271,-283,-296,-304,-339,-286,
-414,-410,-391,-384,-423,-428,-534,-316]} 1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 4. Nc3
O-O 5. e4 d6 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. f3 f4 12.
Bd2 g5 13. b4 Nf6 {E99: King's Indian: Classical Main Line: 9 Ne1 Nd7 10 f3 f5.
} 14. c5 Ng6 15. cxd6 $146 {[%eval 4,30]} (15. Nf2 $14 {[%eval 67,29]}) ({
Predecessor:} 15. Rc1 Rf7 16. Nf2 h5 17. h3 Bf8 18. cxd6 cxd6 19. a4 Rg7 20.
Be1 Nh8 21. a5 Nf7 22. Nb5 Nh6 23. Qc2 g4 24. Nc7 gxh3 25. Nxa8 Bd7 26. Nc7
hxg2 27. Ne6 gxf1=Q+ 28. Kxf1 Bxe6 29. dxe6 {0-1 (43) Debarnot,R-Ree,H Nice
1974}) 15... cxd6 $11 {The position is equal.} 16. Rc1 h5 17. Nb5 {[%eval -72,
22]} (17. Nf2 $11 {[%eval -8,27]}) 17... Rf7 $1 $17 18. Nf2 Bf8 {[%eval -27,25]
} (18... g4 $17 {[%eval -111,26] Threatening ...g3.} 19. Nd3 gxf3 20. gxf3 Bh3)
19. a4 $146 ({RR} 19. h3 {[%eval -116,30] 19.Qc2 -0.17} g4 20. hxg4 hxg4 21.
fxg4 Ne8 22. Rc3 a6 23. Na3 b5 {[%eval 0,27]} ({Better is} 23... Be7 $15 {
[%eval -69,27]}) 24. Qc2 {[%eval -92,30]} (24. Nc2 $11 {[%eval 0,27]}) 24...
Bd7 25. Rc1 Be7 26. Be1 Bh4 27. Nh3 {[%eval -212,24] [#]} (27. Nb1 $17 {
[%eval -89,26] is a better defense.}) 27... Rh7 {[%eval -100,28]} (27... a5 $1
$19 {[%eval -212,24] and Black stays clearly on top.} 28. Bxh4 Qxh4) 28. Bxh4
Rxh4 {[%eval -45,30]} (28... Qxh4 $17 {[%eval -122,26]} 29. Nb1 a5) 29. Qd1 $2
{[%eval -255,28]} (29. Nb1 $15 {[%eval -45,30]}) 29... Nf6 30. Rc7 $2 {[%eval
-457,24]} (30. Nf2 {[%eval -183,29]}) 30... Nxg4 31. Bxg4 Rxg4 32. Nf2 Rg5 33.
Nd3 $2 {[%eval -619,25]} (33. Kf1 {[%eval -329,26]}) 33... Nh4 {Wesolowska,H 
(2115)-Bos Swiecik,I (2140) Jachranka 1987 0-1 (40)}) 19... a6 $1 {[%cal Ra6b5]
} 20. Na3 Rg7 21. h3 Nh4 22. Rc3 Bd7 23. Qc2 $2 {[%eval -280,25] [#]} ({
White should try} 23. a5 $15 {[%eval -43,28]}) 23... g4 $1 $19 {[%cal Rg4h3]}
24. hxg4 hxg4 25. fxg4 Nxg4 26. Bxg4 Bxg4 27. Nxg4 Rxg4 28. Rf2 Qg5 {[%cal
Rg4g2]} 29. Be1 f3 {[%cal Rh4g2]} 30. Rcxf3 {[%eval -414,23]} (30. Kf1 {
[%eval -286,28] might work better.} Nxg2 31. Rfxf3) 30... Nxf3+ 31. Rxf3 Qg6
32. Rf5 Bh6 {White must now prevent ...Be3+.} 33. Nc4 Rf8 {Accuracy: White =
34%, Black = 75%.} 0-1

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "10"]
[White "Trois, Francisco R Torres"]
[Black "Segal, Alexandru Sorin"]
[Result "1/2-1/2"]
[ECO "D59"]
[WhiteElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "20"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 7. Bh4 b6 8. Rc1
Bb7 9. cxd5 Nxd5 10. Bxe7 Qxe7 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "10"]
[White "Ary, Edgar Nadra"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "B76"]
[BlackElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "40"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 O-O 8.
Bb3 d6 9. f3 Nd7 10. h4 Nc5 11. h5 Nxd4 $146 ({RR} 11... Nxb3 12. axb3 e6 13.
Qd2 d5 14. exd5 exd5 15. O-O-O Re8 16. Nxc6 bxc6 17. Bd4 Bxd4 18. Qxd4 Qg5+ 19.
f4 Qe7 20. Rde1 Qxe1+ 21. Rxe1 Rxe1+ 22. Kd2 Rh1 23. hxg6 hxg6 24. Qc5 Bg4 25.
Qxc6 Rd8 26. Qf6 {Minic,D-Haag,E Belgrade 1962 1/2-1/2 (52)}) ({RR} 11... Qa5
12. hxg6 hxg6 13. g4 Be6 14. Qd2 Rfc8 15. O-O-O Bxb3 16. Nxb3 Nxb3+ 17. cxb3
Ne5 18. Kb1 Nxf3 19. Qf2 Rxc3 20. Qxf3 Rc7 21. Bd4 Bxd4 22. Rxd4 Rac8 23. Rd5
Qb4 24. a3 Rc3 25. Rh8+ Kxh8 26. Qh1+ {Martin Gonzalez,A (2430)-Petursson,M 
(2550) Biel 1985 1/2-1/2 (42)}) ({RR} 11... Nxb3 12. axb3 e6 13. hxg6 hxg6 14.
Qd2 Qf6 15. Nxc6 bxc6 16. Qxd6 Rd8 17. Qh2 Qe7 18. Qh7+ Kf8 19. Bh6 Bxh6 20.
Qh8# {1-0 (20) Dann,M (2477)-Aketayeva,D (2130) chess.com INT 2023}) ({RR} 
11... Nxb3 12. axb3 Bd7 13. hxg6 fxg6 14. Qd2 a5 15. Nce2 Rf7 16. c3 Qb8 17.
Bh6 Bh8 18. f4 Nxd4 19. cxd4 d5 20. e5 Qd8 21. Nc3 e6 22. Nd1 Qb6 23. Ra3 Bb5
24. Rh3 Bxe5 25. Nc3 Bd6 26. Ra1 {Tuncer,U (2303)-Metin,M (2166) Konya 2011 0-1
}) 12. Bxd4 Be6 13. hxg6 fxg6 14. Bxg7 Kxg7 15. Qd2 Rf7 16. O-O-O Nxb3+ 17.
cxb3 Qa5 18. Qh6+ Kg8 19. f4 Rc8 20. Kb1 Bg4 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "10"]
[White "Pimenta, Jeronimo Marques"]
[Black "Filguth, Rubens Alberto"]
[Result "1/2-1/2"]
[ECO "E14"]
[BlackElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "49"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. e3 d5 6. Bd3 Nbd7 7. O-O Bd6 8. b3
O-O 9. Bb2 a6 10. Qe2 Ne4 11. Rfd1 f5 12. Ne5 Nxe5 13. dxe5 Bxe5 14. Nxe4 Bxb2
15. Qxb2 fxe4 16. Bxe4 Qh4 17. Bf3 Rxf3 $146 ({RR} 17... Qg5 18. Qe2 Rf6 {
1/2-1/2 (18) Roldan Marques,D (2255)-Bayo Milagro,A (2273) Zaragoza 2017}) 18.
gxf3 Qh3 19. Qe5 Rf8 20. Rd4 Qxf3 21. Qxe6+ Kh8 22. Rf4 Rxf4 23. exf4 h6 24. f5
dxc4 25. Qe8+ 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "11"]
[White "Segal, Alexandru Sorin"]
[Black "Pimenta, Jeronimo Marques"]
[Result "1/2-1/2"]
[ECO "B18"]
[Annotator "Stockfish 16"]
[PlyCount "20"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Bd3 Bxd3 8.
Qxd3 Ngf6 9. O-O e6 10. c4 Be7 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "11"]
[White "Rocha, Antonio Cavilhas"]
[Black "Ary, Edgar Nadra"]
[Result "1/2-1/2"]
[ECO "E18"]
[WhiteElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "29"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. d4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4
Bxe4 9. Ne1 Bxg2 10. Nxg2 d5 11. Qa4 dxc4 12. Qxc4 c5 13. dxc5 Bxc5 14. Be3
Bxe3 15. Nxe3 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "11"]
[White "Filguth, Rubens Alberto"]
[Black "Masculo, Jose Soares"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2350"]
[Annotator "Stockfish 16"]
[PlyCount "79"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. O-O Bd7 5. c3 Nf6 6. Re1 a6 7. Ba4 b5 8. Bc2
Bg4 9. d3 e6 10. Be3 Be7 11. Nbd2 d5 12. h3 Bh5 13. Qe2 $146 ({RR} 13. Bg5 dxe4
14. dxe4 Nd7 15. Bxe7 Qxe7 16. Qe2 O-O 17. Qe3 Bg6 18. a4 h6 19. Nb3 e5 20.
Red1 c4 21. Nbd2 Nc5 22. Nh4 Rad8 23. Nf5 Bxf5 24. exf5 Nd3 25. axb5 axb5 26.
b3 Qd7 27. f6 Nb2 {Yudin,S (2596)-Pushkarev,D (2424) Irkutsk 2009 1-0}) 13...
O-O 14. Nf1 Nd7 15. Ng3 Bg6 16. d4 cxd4 17. Nxd4 Nxd4 18. Bxd4 dxe4 19. Bxe4
Bxe4 20. Qxe4 Nf6 21. Bxf6 Bxf6 22. Rad1 Qe7 23. Nh5 Rfd8 24. Qc6 Bh4 25. Nf4
Qa7 26. Qf3 g6 27. Nd3 Rd5 28. Ne5 Rad8 29. Rxd5 Rxd5 30. g3 Bd8 31. Rd1 Rxd1+
32. Qxd1 Bb6 33. Qf3 Qc7 34. Ng4 h5 35. Nf6+ Kf8 36. Kg2 Ke7 37. Ng8+ Kf8 38.
Nf6 Ke7 39. b3 Ba5 40. b4 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "11"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Camara, Helder"]
[Result "1-0"]
[ECO "C16"]
[WhiteElo "2375"]
[BlackElo "2325"]
[Annotator "Stockfish 16"]
[PlyCount "77"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

{[%evp 14,77,64,56,128,119,153,125,181,175,174,160,168,165,206,132,141,138,261,
234,218,103,110,110,97,56,52,50,60,50,49,59,56,37,41,7,106,56,107,66,177,177,
329,322,318,308,332,328,316,324,318,296,428,422,422,414,511,509,511,507,507,
460,467,401,29984,29985]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. Bd2 b6 6.
Nf3 Ba6 7. Bxa6 Nxa6 8. Ne2 Bf8 {[%eval 128,29] C16: French: 3 Nc3 Bb4 4 e5:
Lines without ...c5.} (8... Bxd2+ $14 {[%eval 56,26]} 9. Qxd2 Ne7) 9. O-O h5
$146 ({RR} 9... c5 10. c3 Ne7 11. Nf4 Nb8 12. Rc1 c4 13. b3 Nbc6 14. Nh5 h6 15.
Be3 Na5 16. Nd2 O-O-O {[#]} 17. g4 {[%eval 82,29]} (17. Qf3 $1 $18 {[%eval 161,
24]}) 17... g6 18. Ng3 Kb8 19. Qe2 Rc8 20. f4 {[%eval 21,33]} (20. b4 $16 {
[%eval 84,23]} Nb7 21. h4) 20... h5 21. b4 Nac6 22. gxh5 gxh5 23. Nxh5 Nf5 $1
24. Ng3 {Mecking,H (2630)-Andersson,U (2545) Wijk aan Zee 1978 0-1 (44)}) ({RR
} 9... Nb8 10. c3 Ne7 11. Nf4 c5 12. Nh5 Ng8 13. b4 {[%eval 110,28]} (13. c4
$18 {[%eval 198,28]}) 13... g6 14. Nf6+ Nxf6 15. exf6 Nc6 {[%eval 237,25]} (
15... c4 $16 {[%eval 109,27]}) 16. bxc5 bxc5 17. Ne5 {[%eval 75,30]} (17. Rb1
$18 {[%eval 223,26] is more deadly.}) 17... Nxe5 18. dxe5 h6 $2 {[%eval 348,26]
[%mdl 8192]} (18... c4 $16 {[%eval 73,27] keeps fighting.}) 19. Rb1 $2 {
[%eval 122,28]} (19. c4 $18 {[%eval 348,26]}) 19... h5 $2 {[%eval 370,26]} (
19... c4 $16 {[%eval 122,28]}) 20. Qe2 $2 {[%eval 106,28]} (20. c4 $18 {
[%eval 370,26]}) 20... Bh6 $2 {[%eval 553,26][%mdl 8192]} (20... c4 $16 {
[%eval 106,28] is more resistant.}) 21. Bxh6 Rxh6 22. Qa6 Kf8 23. Rb7 Qc8 24.
Qd6+ {Vasquez Schroeder,R (2443)-Goncharov,V lichess.org INT 2021 1-0}) ({
Predecessor:} 9... Ne7 10. Re1 c5 11. Nf4 Nb8 12. dxc5 bxc5 13. c4 d4 14. Nd3
Nec6 15. Ng5 a5 16. Re4 {1-0 (52) Trois,F (2395)-Pimenta,J Curitiba 1977}) 10.
Bg5 $146 ({RR} 10. Nf4 h4 {[%eval 220,25]} (10... c6 $16 {[%eval 126,27]} 11.
Qe2 Nc7) 11. Qe2 Nb8 12. c4 dxc4 $2 {[%eval 459,23]} (12... Ne7 {[%eval 219,28]
} 13. Rfc1 dxc4 14. Rxc4 c6) 13. d5 exd5 14. e6 fxe6 15. Nxe6 Qe7 16. Nxc7+ Kd7
17. Qxe7+ Nxe7 18. Nxa8 Na6 19. Rfe1 Nc5 20. Bg5 Ne4 21. Bxe7 Bxe7 22. Ne5+ Ke6
23. Ng6 Rxa8 24. Nxe7 Kxe7 {Martic,Z (2265)-Kuzmanovic,M (2235) Pula 1994 1-0 
(35)}) 10... Nb8 {[%eval 181,30]} (10... c6 $16 {[%eval 125,27]} 11. a4 Be7)
11. c4 dxc4 12. Qc2 {d5 is the strong threat.} Ne7 13. Qxc4 Nd5 14. Nc3 Nxc3
15. Qxc3 Be7 {[%eval 261,30]} (15... Nc6 $16 {[%eval 138,27]}) 16. d5 $18 {
Threatens to win with dxe6.} O-O 17. dxe6 {[%eval 103,30]} (17. h4 $18 {
[%eval 218,29] and White stays clearly on top.}) 17... Qxe6 $16 18. Qxc7 Bc5
19. Be3 Bxe3 20. fxe3 Na6 21. Qc2 Rac8 22. Qe2 Qc4 23. Qf2 Nc5 24. Nd4 g6 {
[%eval 106,24]} (24... Rce8 $11 {[%eval 7,29] remains equal.}) 25. Qg3 Ne6 26.
Nxe6 Qxe6 {[%eval 177,27]} (26... h4 $1 $14 {[%eval 66,34]} 27. Qg5 Qxe6) 27.
Rf6 $36 {[%mdl 2048] Black is under strong pressure.} Qg4 $2 {[%eval 329,28]} (
27... Qd5 {[%eval 177,30]}) 28. Qxg4 hxg4 {[%mdl 4096] Endgame KRR-KRR} 29. e6
fxe6 30. Rxg6+ Kh7 31. Rxg4 ({Not} 31. Rxe6 Rc2 $16) 31... Rc2 32. b4 Rff2 {
[%eval 428,29]} (32... Re2 $142 {[%eval 296,30]} 33. Rg3 Rb2) 33. a4 Rfe2 34.
Rf1 Rxe3 35. Rf7+ Kh6 36. h3 a5 37. Rf8 {[%cal Rf8h8] [#]} Kh7 38. Rff4 Ree2 {
[%eval 32736,27]} (38... axb4 $18 {[%eval 401,32]} 39. Rxb4 Rc6) 39. Rg3 {
Accuracy: White = 70%, Black = 43%.} 1-0

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "11"]
[White "Carvalho, Herbert Abreu"]
[Black "Sunye Neto, Jaime"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2265"]
[BlackElo "2360"]
[Annotator "Stockfish 16"]
[PlyCount "143"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. d4 b6 4. a3 d5 5. cxd5 exd5 6. Nc3 Be7 7. Bg5 O-O 8. e3
Nbd7 9. Be2 Bb7 10. O-O Ne4 ({RR} 10... c5 11. Qc2 Ne4 12. Bxe7 Qxe7 13. dxc5
Nxc3 14. Qxc3 bxc5 15. Rfe1 Rfd8 16. b4 Rac8 17. bxc5 Qxc5 18. Qb4 Nb6 19. h3
Ba8 20. Nd4 Nc4 21. Qxc5 Rxc5 22. Rec1 Bb7 23. Rc3 Ba6 24. Rb1 g6 25. Rb4 {
Andersson,U (2620)-Ribli,Z (2625) Reggio Emilia 1989 1/2-1/2 (42)}) ({RR} 10...
h6 11. Bh4 c5 12. dxc5 Nxc5 13. Nd4 Nfe4 14. Bxe7 Qxe7 15. Rc1 Nxc3 16. Rxc3
Ne4 17. Rc1 Rac8 18. Qa4 a5 19. Qb5 Qf6 20. Rcd1 Rc5 21. Qd7 Bc8 22. Qa7 Qg6
23. Bf3 Ng5 24. Kh1 Nxf3 25. Nxf3 {Goncharov,V (2077)-Tiarks,J (2211) chess.
com INT 2023 1/2-1/2 (86)}) 11. Bxe7 Qxe7 12. Qb3 Ndf6 13. Rac1 $146 ({RR} 13.
Rfd1 Rfe8 14. Ne5 Nxc3 15. bxc3 c5 16. Rac1 c4 17. Qa2 Ne4 18. Rc2 f6 19. Nf3
Bc6 20. Rdc1 b5 21. Rb1 a5 22. Qb2 Reb8 23. Nd2 Nxd2 24. Rxd2 Ra7 25. Qa2 Kh8
26. Rdb2 b4 27. cxb4 axb4 {Britsch,D-Imhof,T Stuttgart 2001 0-1}) ({RR} 13.
Rad1 Rfd8 14. Nd2 Nxc3 15. Qxc3 c5 16. Nf3 Ne4 17. Qc2 Rac8 18. Qb1 c4 19. Rc1
b5 20. Rc2 a5 21. Nd2 Nd6 22. Rfc1 b4 23. axb4 axb4 24. Rf1 Ra8 25. Bf3 f5 26.
g3 Ra6 27. Qd1 Ra2 {Delgado Montanes,J-Chaverra Rojas,B Pamplona 2001 0-1 (42)}
) 13... c5 14. dxc5 bxc5 15. Nxe4 Nxe4 16. Rfd1 Rfd8 17. Qa4 h6 18. b4 d4 19.
exd4 cxd4 20. Nxd4 Nxf2 21. Kxf2 Qh4+ 22. Kg1 Rxd4 23. Qb3 Re8 24. Bf3 Rxd1+
25. Qxd1 Bxf3 26. Qxf3 Re1+ 27. Rxe1 Qxe1+ 28. Qf1 Qe3+ 29. Qf2 Qc1+ 30. Qf1
Qxa3 31. Qe1 Qa4 32. h3 Qc6 33. Qe7 a6 34. Kh2 g6 35. Qe5 h5 36. Qd4 Qc7+ 37.
Kg1 Kf8 38. Qh8+ Ke7 39. Qd4 Qc6 40. Qe5+ Kd7 41. Qd4+ Kc8 42. Qf4 Qd5 43. Qf6
Kb7 44. Kh1 Qf5 45. Qd6 Qe6 46. Qc5 f6 47. Qf8 g5 48. Qg7+ Kb6 49. Qf8 Qe1+ 50.
Kh2 Qe5+ 51. Kh1 Kb5 52. Qd8 Qe1+ 53. Kh2 Qxb4 54. Qe8+ Ka5 55. Qxh5 Qd6+ 56.
Kh1 Kb6 57. Qe2 Qe5 58. Qf2+ Kb7 59. Qf3+ Kc7 60. Qa8 Qe1+ 61. Kh2 Qe6 62. Qa7+
Kc8 63. Qa8+ Kd7 64. Qa7+ Ke8 65. Qa8+ Kf7 66. Qa7+ Kg6 67. Qa8 f5 68. Qd8 g4
69. hxg4 fxg4 70. Kg3 Qe5+ 71. Kxg4 Qf5+ 72. Kg3 1/2-1/2

[Event "45BRA-ch"]
[Site "Natal"]
[Date "1978.07.??"]
[Round "11"]
[White "Braga, Cicero Nogueira"]
[Black "Trois, Francisco R Torres"]
[Result "1/2-1/2"]
[ECO "C97"]
[BlackElo "2385"]
[Annotator "Stockfish 16"]
[PlyCount "22"]
[EventDate "1978.07.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 1/2-1/2

