[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Santiago, Yago De Moura"]
[Black "Da Fonseca Pinto, Joao Gabriel Alves"]
[Result "1-0"]
[Annotator "TA"]
[WhiteElo "2451"]
[BlackElo "1952"]
[PlyCount "31"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,18,14,22,8,12,5,24,14,41]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 O-O 5. Bg2 d5 6. Nf3 Nbd7 7. O-O {E20: Nimzo-Indian: 4 g3 and 4 f3.} c6 8. Qc2 $1 {[%mdl 4] is more profitable than 8.Qb3 at the moment.} Re8 9. Rd1 Qe7 {Not much happened in this game.   Weighted Error Value: White=0.10 (very precise) /Black=0.11 (very precise)   Inaccurate:     	---       	Black=1} 10. b3 $146 e5 11. dxe5 Nxe5 12. cxd5 Bxc3 13. Qxc3 Nxd5 14. Qxe5 Qxe5 15. Nxe5 Rxe5 16. e4 {1-0 Thejkumar,M (2416)-Piyush,P (2020) IND-chB 48th 2010 (1)} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Ribeiro, Matheus Mendes Domin"]
[Black "De Menezes, Ricardo Fagner Dias"]
[Result "1-0"]
[Annotator "TA"]
[ECO "A35"]
[WhiteElo "2328"]
[BlackElo "1911"]
[PlyCount "47"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,47,31,83,83,91,80,89,82,75,77,72,68,74,56,76,80,84,62,87,45,44,50,113,108,156,156,161,168,150,175,169,145,286,282,839,838]} 1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. e3 {[%cal Be2e3,Be3d4,Bd4d5][%mdl 32]} Bg7 5. d4 cxd4 6. exd4 d6 7. Be2 Nf6 (7... e6 $14) 8. d5 $16 Nb8 9. O-O Bg4 10. Nd4 {White is better.} Bxe2 11. Qxe2 O-O 12. Re1 {White is much more active. The black rooks are passive.} Re8 13. Be3 Qc8 14. h3 Nbd7 15. Rac1 a6 16. b4 {[%cal Bb2b4,Bb4c5][%mdl 32]} Qd8 17. Nb3 {[%cal Bd4b3,Bb3a5,Ba5c4,Bc4a5][%mdl 32]} Nf8 ({Better is} 17... Nb6 $14) 18. Red1 Rc8 (18... Qc7 $142 19. c5 Rad8) 19. c5 Qd7 20. Na5 dxc5 21. bxc5 Qc7 22. Nc4 N6d7 (22... N8d7 $16 {is a better defense.}) 23. d6 $18 Qc6 {[#]} (23... exd6 24. Nxd6 Nxc5 25. Nxc8 (25. Nxe8 Rxe8 26. Nd5 Qa5 $18) (25. Na4 b6 $18) 25... Qxc8) 24. Na5 {Weighted Error Value: White=0.06 (flawless) /Black=0.24 (precise) .  Mistake:       	---       	Black=4      Inaccurate:     	White=1     	---        OK:         	White=7     	Black=8      Best:        	White=1     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Guimaraes, Diogo Duarte"]
[Black "De Lima, Victor Trevisan"]
[Result "1-0"]
[Annotator "TA"]
[ECO "C54"]
[WhiteElo "2299"]
[BlackElo "1928"]
[PlyCount "71"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,71,7,13,8,-6,7,16,16,22,16,8,9,31,34,45,36,59,45,27,47,105,105,97,102,96,96,141,147,140,148,143,141,129,128,177,133,128,135,134,129,191,182,205,212,224,215,210,205,205,199,352,331,379,379,356,346,452,448,455,450,29997,29998]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Be2 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} Ne4 {[%cal Od4d3] Threatens to win with ...d3!.} 8. cxd4 Bb4+ 9. Bd2 {The position is equal.} Bxd2+ 10. Nbxd2 O-O 11. O-O Re8 $146 (11... Bf5 12. Rc1 Qe7 13. Nb3 f6 14. Re1 Kh8 15. Bb5 Nd8 16. exf6 Qxf6 17. Ne5 c6 {1-0 Jobava,B (2582)-Adams,M (2714) EU-chT 23rd Terme Catez 2021 (2.11)}) 12. Rc1 f6 13. Bb5 Bd7 {[%cal Rc6e5]} 14. Re1 Nxe5 {Strong Rooks White (c1+e1)} 15. dxe5 {White sacrificed a pawn} Bxb5 ({Black should try} 15... Nxd2 $14 16. Qxd2 Bxb5) 16. Nxe4 $16 dxe4 17. Qb3+ Kh8 18. Qxb5 (18. Rxe4 Bc6 19. Rd1 Qe7 $11) (18. exf6 {simplifies} gxf6 19. Qxb5 exf3 20. Rxe8+ Qxe8 21. Qxb7 c6 22. Qxc6 Qxc6 23. Rxc6 Rg8 24. Rxf6 Rxg2+ 25. Kf1) 18... c6 19. Qxb7 exf3 20. Qxc6 Qd2 21. Rcd1 (21. gxf3 fxe5 $14) 21... Qa5 22. Qxf3 $40 {[%mdl 128] White wants a kill.} fxe5 {Black is weak on the light squares} (22... Rab8 $16 {keeps fighting.} 23. e6 Qxa2) 23. Qd5 Qb6 24. b3 Rf8 {[#]} 25. Qd2 {Active counter play!} (25. Qxe5 $6 Qxf2+ 26. Kh1 Qxa2 $14) 25... a5 (25... Rad8 $16 26. Qb2 Rd4) 26. Qe3 Qb4 27. Qxe5 a4 28. Rd7 {[%csl Gd7][%cal Re5g7,Bd1d7,Bd7e7,Be7a7,Ba7a8][%mdl 32]} Rf6 29. Qe7 Qxe7 30. Rdxe7 $18 {[%mdl 4096] Endgame KRR-KRR. White is two pawns up.} a3 $2 {[#]} (30... axb3 31. Re8+ (31. axb3 Rff8 $18) 31... Rf8 32. Rxf8+ (32. Rxa8 Rxa8 33. axb3 Kg8 $18) 32... Rxf8) 31. Ra7 $1 {[%mdl 512]} Rff8 (31... Rd8 32. h3) 32. Ree7 Rac8 {( -> ...Rc1+)} 33. g3 (33. Rxa3 $2 {gets mated.} Rc1+) 33... Rc1+ 34. Kg2 Rc2 35. Rf7 ({Inferior is} 35. Rxa3 Rfxf2+ 36. Kg1 Rg2+ 37. Kf1 h5 $11) 35... Rxf7 (35... Rg8 $18 36. Rxa3 Rc5) 36. Ra8+ {Weighted Error Value: White=0.04 (flawless) /Black=0.43  Mistake:       	---       	Black=5      Inaccurate:     	---       	Black=2      OK:         	White=13    	Black=10     Best:        	White=3     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Silva, Caio Henrique Angeli"]
[Black "Pimenta, Heitor Castelar Brit"]
[Result "1-0"]
[Annotator "TA"]
[ECO "E04"]
[WhiteElo "2197"]
[BlackElo "1896"]
[PlyCount "51"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,51,0,40,22,66,70,73,57,74,66,119,106,128,114,116,117,153,142,151,152,214,213,227,207,218,207,212,218,193,211,227,213,218,202,207,212,360,329,327,323]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Nc6 6. O-O Rb8 7. e3 a6 8. Qe2 {E04: Open Catalan: 5 Nf3.} Be7 9. Qxc4 O-O 10. b3 {White is better.} Bd7 $146 (10... Re8 11. Bb2 Bd6 12. Nbd2 e5 13. dxe5 Nxe5 14. Qc2 Qe7 15. Rac1 c6 16. Rfe1 Nd5 17. Nxe5 Bxe5 18. Bxe5 Qxe5 {1-0 Sowinski,P (2364)-Kazantzoglou,S (1927) EU-ch U14 31st 2023 (7)}) 11. Rd1 b5 (11... Nb4 $14) 12. Qe2 $16 Qc8 13. Bb2 Rd8 14. Nbd2 Nb4 {[%cal Bc6b4,Bb4d5,Bd5e7][%mdl 32]} 15. Rdc1 c6 16. Ne5 Qb7 (16... a5 $16 17. a3 Nbd5) 17. a3 $18 Nbd5 18. b4 Bd6 19. e4 Ne7 {[#]} 20. Nxf7 $1 {[%mdl 512]} Kxf7 21. e5 Bxe5 22. dxe5 Nfd5 23. Ne4 {aiming for Nd6+.} Kg8 24. Qg4 g6 (24... Ra8 {keeps fighting.} 25. Nf6+ Kh8) 25. h4 {[%cal Bh2h4,Bh4h5][%mdl 32] Black is weak on the dark squares} Rf8 26. h5 {White took control after the opening.   Weighted Error Value: White=0.07 (flawless) /Black=0.28 (precise)   Mistake:       	---       	Black=3      Inaccurate:     	---       	Black=2      OK:         	White=8     	Black=7} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Contreras Huaman, Fiorella"]
[Black "Lelis, Lucas Porto"]
[Result "1-0"]
[Annotator "TA"]
[ECO "C78"]
[WhiteElo "2170"]
[BlackElo "1914"]
[PlyCount "75"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 15,75,32,41,0,0,0,0,0,0,0,27,37,34,27,74,83,78,72,82,72,70,81,68,87,127,114,177,137,225,223,331,335,335,317,319,318,322,318,317,304,287,302,292,296,278,230,239,240,232,235,286,251,340,326,422,413,426,415,686,687,682,675]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. d4 Bb6 9. Re1 {9.Be3 is the modern continuation. C78: Ruy Lopez: Archangelsk and Möller Defences.} O-O 10. h3 Re8 11. Ng5 {The position is equal.} Re7 {A sharp opening} 12. d5 Nb8 13. a4 $146 (13. Be3 Nbd7 14. Bxb6 Nxb6 15. Nd2 Bd7 16. Nf1 a5 17. Ng3 a4 18. Bc2 Re8 19. Qf3 {0-1 Traetmar,M (1888)-Lenz,J (1954) GER Pfingstopen U25 blitz 2020 (8)}) 13... h6 14. Nf3 {[%cal Bg5f3,Bf3h4,Bh4f5][%mdl 32]} bxa4 (14... Ra7 $11) 15. Bxa4 $16 {Black is on the road to losing.} Bd7 16. Nh4 Bxa4 17. Rxa4 Re8 18. Nf5 Nbd7 19. Qf3 {[%csl Of5][%cal Oc1h6] Strong Square White (f5)} Nf8 20. Nd2 {White has more active pieces.} Qd7 (20... N6d7 $16) 21. b3 $40 {[%mdl 128] White goes for the king.} N8h7 (21... Qd8 $16 22. Nc4 N6d7 23. Nxb6 Nxb6) 22. Nc4 $18 {[%cal Oc1h6] Bxh6! would now be deadly.} h5 {[#]} (22... Rab8 {was called for.} 23. Rxa6 Qb5) 23. Nfxd6 $1 {[%mdl 512]} Bxf2+ 24. Qxf2 (24. Kxf2 cxd6 25. Qe3 Qe7 $18) 24... cxd6 25. Nb6 {[%csl LRa8,LRd7]} Qc7 26. Rc4 Qb7 27. Nxa8 Rxa8 28. b4 a5 29. bxa5 Rxa5 30. Rb4 Qc8 31. Qb2 Nd7 {Repels Rb8} 32. Be3 Qa6 33. Qe2 Qc8 34. Rc4 ({Less strong is} 34. Qxh5 Qxc3 35. Rbb1 Nhf6 $18) 34... Qa6 35. Rc6 Qxe2 36. Rxe2 Nc5 (36... Ra1+ $142 37. Kh2 Nhf6 38. Rxd6 Ra3) 37. Bxc5 Rxc5 38. Rb2 {Weighted Error Value: White=0.07 (flawless) /Black=0.37  Mistake:       	---       	Black=5      Inaccurate:     	---       	Black=3      OK:         	White=12    	Black=11     Best:        	White=2     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "De Oliveira, Yuri Garcia"]
[Black "Cunha, Rodrigo Azalim"]
[Result "1-0"]
[Annotator "TA"]
[ECO "E06"]
[WhiteElo "1978"]
[BlackElo "1786"]
[PlyCount "103"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 13,103,17,16,17,31,27,43,43,53,22,48,44,46,22,14,13,6,13,12,-1,0,-24,61,58,58,55,95,33,82,80,87,70,121,121,121,121,104,58,58,62,63,63,68,69,67,47,54,47,92,88,96,47,47,47,79,47,47,47,47,47,47,47,47,35,47,47,50,12,108,59,60,60,197,119,100,97,199,193,29970,29972,29972,29973,29973,29974,29972,29971,29976,29970,29974,29975,29977,29975]} 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 c6 7. b3 b6 {[%cal Bb7b6,Bb6b5][%mdl 32]} 8. Bb2 a5 9. Qc2 Ba6 10. Nbd2 {White is slightly better.} b5 11. Rfd1 a4 12. Rac1 Nbd7 13. e4 axb3 14. axb3 bxc4 15. bxc4 dxc4 16. Bf1 Nb6 17. Ne5 Qc8 (17... Bb5 $1 $11 18. Qb1 (18. Ndxc4 Ba4 $17) (18. Bxc4 Nxc4 19. Ndxc4 Ba4 $17) (18. Nexc4 Ba4 $17) 18... Ba4 19. Ndxc4 (19. Re1 Bb4 $15) 19... Nxc4 20. Rxc4 Bxd1 21. Qxd1 Nxe4 22. Nxc6 Qd6) 18. Ndxc4 $14 Nxc4 19. Nxc4 Rb8 {Repels Nb6} 20. Ba1 (20. Ne5 $16 Bb7 21. Bg2 (21. Nxc6 $2 Qxc6 22. f3 Rfd8 $19)) 20... c5 (20... Re8 $14 {feels stronger.}) 21. d5 $16 exd5 22. exd5 {[%cal Be4d5,Bd5d6][%mdl 32]} Rd8 ({Better is} 22... Bxc4 $14 23. Bxc4 (23. Qxc4 Rb4 $16) 23... Bd6) 23. d6 Bf8 24. Bxf6 (24. Bd3 {is more complex.} Qe6 25. Re1 Qh3 26. Bxf6 gxf6 27. Ra1) 24... gxf6 25. Bd3 {White has more active pieces.} ({White should try} 25. Rd5 $16) 25... Bxc4 $14 26. Qxc4 {[%cal Od3h7] Strongly threatening Bxh7+!} Rxd6 {[#]} 27. Bxh7+ $1 Kg7 $1 28. Rxd6 (28. Qxc5 Rxd1+ 29. Rxd1 Bxc5 (29... Qxc5 $2 30. Be4 $19) 30. Be4 Qg4 31. Bc2 Qe2 32. Rf1 Qxc2 33. Kg2 Qe4+ 34. Kg1 Qf3 (34... Bxf2+ 35. Rxf2 Rb1+ 36. Rf1 Rb2 37. Rf2 Qe1+ 38. Kg2 Qxf2+ 39. Kh3 Qf3 40. Kh4 Rxh2#) 35. h4 Bxf2+ (35... Qxg3+ 36. Kh1 Qxh4+ 37. Kg2 Qg4+ 38. Kh2 Rh8#) 36. Rxf2 Rb1+ (36... Qxg3+ 37. Kf1 Rb1+ 38. Ke2 Rb2+ 39. Ke1 Qxf2+ 40. Kd1 Qg1#) (36... Qxg3+ 37. Kf1 Rb1+ 38. Ke2 Rb2+ 39. Ke1 Qxf2+ 40. Kd1 Qg1#)) 28... Bxd6 {Black is weak on the light squares} 29. Qd3 (29. Bc2 {simplifies} Qe6 30. Qd3 f5 31. Qxf5 Qxf5 32. Bxf5 Kf6 33. Bd3) 29... Be5 30. Bf5 Qf8 31. Qf3 {White wants to mate with Qg4+.} Qd6 32. Rd1 (32. Qh5 $16) 32... Bd4 33. Rd2 (33. Rb1 {simplifies} Rxb1+ 34. Bxb1 Kf8 35. Bh7) 33... Qa6 34. Bd3 Qa1+ 35. Kg2 Rb2 36. Qg4+ Kf8 37. Re2 Rxe2 38. Bxe2 {[%mdl 4096] Endgame. KQB-KQB} Qb2 39. h4 Qd2 40. h5 c4 {[#]} 41. Qc8+ (41. Bxc4 Bxf2 42. Qc8+ Kg7 $14) (41. h6 $1 $16 {And now Qc8+ would win.} f5 42. Qf3) 41... Kg7 42. Qxc4 ({Much worse is} 42. Bxc4 Qxf2+ 43. Kh3 Be5 44. Qg4+ Kh6 $11) 42... Be5 (42... f5 $14) 43. Qe4 (43. Bd3 $18) 43... Qd4 $16 44. Qf5 Qd2 {[#] Prevents f4.} (44... Qd5+ $16 45. Bf3 Qe6 46. Qxe6 fxe6) 45. Bd3 $1 $18 {Qh7+ is the strong threat.} Bd4 $2 (45... Kf8 $18 46. Qh7 Bd4) 46. Qg4+ {White mates.} Qg5 47. Qxd4 Qxh5 48. Qe4 Qh6 49. Qf5 Kf8 50. Be4 Kg7 51. f4 Kf8 52. Qh7 {Weighted Error Value: White=0.13 (very precise) /Black=0.31.  Mistake:       	White=5     	Black=7      Inaccurate:     	White=3     	Black=4      OK:         	White=14    	Black=12     Best:        	---       	Black=3      Strong:       	White=1     	Black=1} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Kruger, Israel"]
[Black "Perdomo, Leandro"]
[Result "0-1"]
[Annotator "TA"]
[ECO "C27"]
[WhiteElo "1970"]
[BlackElo "2364"]
[PlyCount "89"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,89,-5,-3,-1,0,-33,-25,-32,-33,-54,13,2,17,3,3,-2,-8,-18,-6,-25,-15,-33,-2,-11,-8,-60,-5,-17,0,-30,-31,-49,0,0,0,-21,-12,-17,0,0,-1,-11,0,-4,-10,0,-5,-47,0,-49,-15,-45,-42,-56,-33,-62,-62,-65,0,-19,23,22,21,21,21,21,39,0,0,0,10,-35,-20,-36,-17,-14,0,-104,720,-29992,630,-1011]} 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. d3 O-O 5. Nf3 d6 6. h3 {C27: Vienna Game: 2...Nf6 3 Bc4 Nxe4.} c6 7. Bg5 h6 8. Bh4 {Black has an edge.} Nbd7 9. Qd2 Bb4 $146 ({Black should try} 9... Re8 $15) (9... a5 10. a3 Qb6 11. Bb3 Re8 12. g4 Bb4 13. g5 hxg5 14. Rg1 gxh4 15. Qg5 g6 16. Qxg6+ {1-0 Becker Bertau,F (1954)-Tavassoli,B (1590) Hamburg Koenigsspringer Elo op 5th 2007 (3)}) 10. a3 $11 Qa5 11. O-O (11. axb4 Qxa1+ 12. Nd1 d5 $19) 11... Bxc3 12. bxc3 {A sharp opening} (12. Qxc3 {simplifies} Qxc3 13. bxc3 b5 14. Bb3) 12... Re8 13. Rfe1 Nh5 14. Nh2 {[%cal Bf3h2,Bh2g4,Bg4e3,Be3f5][%mdl 32]} Nf8 15. Ng4 $1 {[%cal Og4h6] and Nxh6+! would now be decisive} Nf4 (15... d5 {keeps more tension.} 16. Nxh6+ gxh6 17. Qxh6 Ng6) 16. Bg3 N8g6 17. d4 (17. Bb3 $11) 17... Be6 (17... h5 $15 18. Ne3 exd4 19. Qxd4 h4 20. Bxf4 Nxf4 21. Qxd6 Qg5 (21... Rxe4 22. Bd3 $11)) 18. Bxe6 Nxe6 {A dynamic duo of knights.} 19. Qd3 Rad8 (19... h5 $5 20. Ne3 $8 h4 $17) 20. Ne3 Qa4 (20... Nef4 $15 21. Qc4 exd4 22. Qxd4 c5) 21. Nf5 Kh7 22. Red1 Nef4 23. Qd2 Qc4 24. Re1 {Dodges Ne2+} f6 25. a4 b6 26. Kh2 Qf7 27. f3 d5 28. Bf2 Ne7 (28... c5 $15) 29. g3 (29. Nxe7 $11 {should be considered.} Rxe7 30. dxe5 fxe5 31. Bh4) 29... Ne6 30. Nxe7 Rxe7 31. exd5 Rxd5 32. h4 {[%cal Oa4a5] Prevents Ng5.} Red7 {[%cal Re5d4]} 33. Qe2 {[%cal Oa4a5]} Kh8 (33... R7d6 $15 34. Qd3+ g6) 34. f4 {[%cal Bf3f4,Bf4f5][%mdl 32]} c5 {[%cal Rc5d4]} 35. f5 $1 Nd8 {[%cal Rc5d4]} 36. c4 R5d6 37. d5 Nb7 38. a5 bxa5 39. Ra4 Rb6 40. c3 Re7 41. Rea1 e4 {[%cal Oe4e3] ...e3! is the strong threat.} 42. Be3 Qe8 43. R1a2 {[#]} (43. h5 $11) 43... Qxa4 $4 {[%mdl 8192]} 44. Qg4 $4 {[%mdl 8192] [#]} (44. Rxa4 $18 Rb1 45. Bf4) 44... Re8 $4 {[%mdl 8192]} 45. Rf2 $4 {[%mdl 8192] Weighted Error Value: White=0.27 (precise) /Black=0.33  Loses game:     	---       	Black=1      Missed win:     	White=1     	Black=1      Mistake:       	White=3     	Black=5      Inaccurate:     	White=7     	Black=3      OK:         	White=12    	Black=13     Best:        	White=1     	Black=1      Strong:       	White=2     	---} (45. Rxa4 $18 Re5 46. Kh3) 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Carvalho Jr, Celestino"]
[Black "Santos, Marcus Vinicius More"]
[Result "1/2-1/2"]
[Annotator "TA"]
[ECO "C02"]
[WhiteElo "1930"]
[BlackElo "2310"]
[PlyCount "46"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,46,37,50,42,46,39,54,43,43,43,50,16,56,37,41,8,39,38,71,14,31,0,0,0,0,0,0,0,18]} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 Nh6 7. Bxh6 gxh6 8. Qd2 Bg7 9. Na3 O-O 10. O-O Bd7 11. Nc2 {C02: French: Advance Variation.} f6 12. exf6 Rxf6 13. dxc5 {White is slightly better.} Qxc5 {[#]} 14. c4 $1 Be8 $146 (14... Rd8 15. b4) (14... Raf8 15. cxd5 exd5 16. Rad1 Be6 17. b4 Qd6 18. Nfd4 Bd7 19. b5 Ne5 20. Ne3 Rf4 {0-1 Durarbayli,V (2606)-Sankalp,G (2429) Titled Tuesday intern op 30th June blitz 2020 (4)}) 15. cxd5 exd5 16. Rac1 Qd6 17. Ncd4 Nxd4 (17... Qf4 {simplifies} 18. Qxf4 Rxf4 19. Nxc6 bxc6 20. b3 a5) 18. Nxd4 (18. Qxd4 $2 {too greedy.} Rxf3 19. Qc5 Rf6 20. Qxd6 Rxd6 $19) 18... Bd7 19. Bf3 {White is more active.} (19. Nb5 $16 Bxb5 20. Bxb5) 19... Raf8 20. Ne2 Rxf3 {The position is equal.} 21. gxf3 d4 22. Qd3 Bc6 {This pair of bishops is nice.} 23. f4 Re8 {Weighted Error Value: White=0.17 (very precise) /Black=0.12 (very precise)   Mistake:       	White=1     	---        Inaccurate:     	White=3     	Black=3      OK:         	White=4     	Black=3} 1/2-1/2

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Rigonati, Eduardo Enrico Santa"]
[Black "Cunha, Lucas Aguiar"]
[Result "0-1"]
[Annotator "TA"]
[ECO "B22"]
[WhiteElo "1921"]
[BlackElo "2222"]
[PlyCount "47"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,47,-5,2,-2,93,90,90,87,183,209,185,-27,-41,-45,-33,-32,0,-29,-30,-26,-31,-147,-144,-157,-130,-130,-134,-130,-121,-258,-268,-279,-284,-260]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} c5 2. Nf3 Nc6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. cxd4 d6 7. Bc4 Nb6 8. Bb5 dxe5 9. Nxe5 {B22: Sicilian: 2 c3.} Qd5 (9... Bd7 $11 10. Bxc6 Bxc6) 10. Bxc6+ $16 bxc6 11. O-O {White is better.} c5 (11... g6 $16) 12. Nc3 $18 Qxd4 13. Qxd4 $146 {[#]} (13. Nb5 $18 Qxe5 14. Re1) (13. Qe2 Nd7 14. Nxf7 Kxf7 15. Qf3+ Nf6 16. Qxa8 Qg4 17. Be3 h5 18. Rfe1 h4 19. h3 {1-0 Hajialiyev,I (2217)-Baghirov,O (1989) AZE-ch 1st League 2025 (3)}) 13... cxd4 $11 14. Nb5 Nd5 {White must now prevent ...f6. Against Nc7+} 15. Rd1 a6 16. Rxd4 axb5 17. Rxd5 f6 $36 {[%mdl 2048] Black has the initiative.} 18. Nd3 {[#]} (18. Nf3 $1 $15) 18... Be6 $1 $17 19. Rd4 ({Of course not} 19. Rxb5 Bc4 (19... Bxa2 $2 {too greedy.} 20. b3 $18) 20. Rb6 Bxd3) 19... Rxa2 20. Rxa2 Bxa2 21. f4 Bc4 {[%cal Oe7e5]} 22. f5 (22. Nf2 $17) 22... g6 $19 23. g4 h5 24. Nf4 {Weighted Error Value: White=0.50/Black=0.19 (very precise)   Missed win:     	White=1     	---        Mistake:       	White=2     	Black=2      Inaccurate:     	White=1     	Black=1      OK:         	White=5     	Black=5      Best:        	White=3     	Black=2      Strong:       	---       	Black=1} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Da Costa, Mariana Nara Santana"]
[Black "De Siqueira, Luigy Lira"]
[Result "0-1"]
[Annotator "TA"]
[ECO "D20"]
[WhiteElo "1906"]
[BlackElo "2252"]
[PlyCount "55"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 9,55,0,0,0,0,0,0,0,0,0,0,0,0,-27,-7,-25,-35,-37,-39,-76,-49,-47,-48,-40,-51,-85,-77,-81,-89,-183,-208,-216,-203,-276,-274,-277,-272,-281,-289,-356,-280,-269,-273,-278,-265,-275,-274,-445]} 1. d4 d5 2. c4 dxc4 3. Nc3 Nf6 4. e3 a6 5. a4 e5 6. Bxc4 {Qb3 would now be deadly. D20: Queen's Gambit Accepted: 3 e3 and 3 e4.} exd4 7. exd4 Nc6 8. Nf3 {The position is equal.} Bd6 9. O-O O-O 10. Bg5 h6 11. Bh4 Bg4 12. Be2 Re8 13. d5 $146 (13. h3 Bh5 14. Re1 g5 15. Bg3 Bxf3 16. Bxf3 Rxe1+ 17. Qxe1 Nxd4 18. Qd1 Bxg3 19. fxg3 {0-1 Najim,K (1751)-Hussein,A (2239) IRQ-chT 29th 2017 (7)}) 13... Nb4 14. Bc4 g5 15. Bg3 Bxg3 16. fxg3 Qd6 17. h3 Bh5 {[%cal Oa8d8] Black is much more active.} (17... b5 18. axb5 axb5 19. Rxa8 (19. Nxb5 Rxa1 20. Nxd6 Rxd1 $11) (19. Bxb5 Bxf3 20. Qxf3 Rxa1 $11) 19... Rxa8 20. Nxb5 (20. Bxb5 Bh5 $14) 20... Qb6+ 21. Kh2 $16) 18. Qd2 Bg6 {[%cal Ob4c2] aiming for ...Nc2!.} 19. Qf2 {[#]} (19. b3 $17) 19... Nc2 $1 $19 (19... Nbxd5 20. Nxd5 Nxd5 21. Rad1 $14) 20. Nd4 Nxa1 21. Rxa1 Ne4 22. Nxe4 Rxe4 23. Bd3 {[%cal Od4f5]} Re5 24. Rf1 Rf8 ({Weaker is} 24... Bxd3 25. Qxf7+ Kh8 26. Ne6 Rxe6 (26... Rxd5 27. Qg7#) 27. dxe6 Qd4+ 28. Rf2 $17) 25. Bc4 {Black has a decisive advantage.} Qc5 26. b3 Re4 27. Rd1 Rd8 28. Kh2 $2 {Weighted Error Value: White=0.20 (precise) /Black=0.06 (flawless)   Mistake:       	White=2     	---        Inaccurate:     	White=4     	Black=1      OK:         	White=7     	Black=18} (28. Rd2 {was worth a try.}) 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "De Assis, Fabio Nery"]
[Black "Silva, Kaua Marques"]
[Result "0-1"]
[Annotator "TA"]
[ECO "A50"]
[WhiteElo "1901"]
[BlackElo "2249"]
[PlyCount "70"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,70,0,3,0,0,-22,-19,-37,-15,-32,-33,-93,-85,-91,-94,-103,-103,-99,-90,-112,-81,-125,-128,-135,-118,-164,-117,-184,-122,-126,-136,-173,-129,-135,-146,-147,-133,-136,-138,-220,-211,-255,-286,-343,-331,-346,-344,-375,-378,-568,-496,-836,-768,-2137,-2122,-2078,-2078,-1638,-1605]} 1. Nf3 Nf6 2. g3 b6 3. c4 Bb7 4. Bg2 g6 5. Nc3 Bg7 6. O-O O-O 7. d4 Ne4 8. Qd3 Nxc3 9. bxc3 d6 10. e4 {The position is equal.} Nc6 11. Rd1 Na5 12. Bf1 (12. Bg5 $15) 12... Ba6 $17 13. Nd2 Qd7 14. Rb1 Qa4 15. Be2 e6 {[%cal Oc7c5] Black is more active.} (15... Qxa2 16. Ba3 Qxa3 17. Ra1 Bxc4 (17... Qb2 18. Rdb1 $16) 18. Nxc4 $16) 16. Rb4 Qd7 17. Qe3 c5 18. Rb1 Qa4 {[%csl LRa2,LRc4]} 19. Qd3 (19. e5 $17) 19... cxd4 (19... Qxa2 20. Ba3 Qxa3 21. Ra1 $11) ({Black should try} 19... Rac8 $19 20. d5 exd5 (20... Qxa2 21. Bb2 $17) 21. Qxd5 Qxa2 (21... Bxc3 22. Bb2 $17)) 20. Rb4 (20. cxd4 $17 d5 (20... Qxa2 21. Ba3 $11) 21. Qa3 Qxa3 22. Bxa3) 20... Qd7 (20... Qxa2 $19 21. cxd4 Rfc8) 21. cxd4 d5 22. e5 Nxc4 23. Nxc4 Bxc4 24. Rxc4 dxc4 25. Qxc4 Rac8 26. Qd3 (26. Qb3 $17) 26... Qa4 $19 27. Ba3 Rfd8 {White must now prevent ...Bxe5.} 28. Bd6 Bf8 29. Bxf8 Kxf8 30. Qd2 Rc2 31. Qg5 (31. Qe3 $142) 31... Rxd4 {Black is clearly winning.} 32. Rxd4 (32. Qe3 $142 Rd7 (32... Rxd1+ $2 33. Bxd1 Qxa2 34. Bxc2 $19) 33. Rd6 Rxd6 (33... Rxa2 $2 34. g4 $19) 34. exd6 Qxa2 35. d7) 32... Qxd4 33. Qf6 Rxe2 34. Qh8+ Ke7 35. Qf6+ Ke8 {Weighted Error Value: White=0.86/Black=0.09 (flawless) .  Mistake:       	White=6     	Black=2      Inaccurate:     	White=2     	---        OK:         	White=3     	Black=14     Best:        	---       	Black=1} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Da Silva, Matheus Pelegrino"]
[Black "Grillo, Carlos Henrique Gome"]
[Result "0-1"]
[Annotator "TA"]
[ECO "D94"]
[WhiteElo "1786"]
[BlackElo "1982"]
[PlyCount "82"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 16,82,37,20,27,40,47,34,44,6,3,8,20,-11,18,0,24,-7,-6,-19,-19,-107,-37,-40,-30,-39,-35,-40,-16,-13,0,0,0,0,0,-56,-57,-144,-130,-212,-59,-68,-68,-71,-65,-164,-173,-172,-162,-170,-154,-184,-176,-192,-161,-400,-412,-408,-406,-449,-443,-551,-552,-543,-543,-567,-558,-701,-693]} 1. c4 Nf6 2. Nc3 d5 3. e3 g6 4. d4 Bg7 5. Nf3 O-O 6. Bd3 c6 7. O-O Nbd7 8. b3 Re8 9. Bb2 dxc4 {D94: Grünfeld: 4 Nf3 Bg7 5 e3.} 10. Bxc4 Qc7 11. Ng5 $146 (11. Qc2 e5 12. dxe5 Nxe5 13. Nxe5 Qxe5 14. Nd5 Qd6 15. Nxf6+ Bxf6 16. Rad1 Qe7 17. Bxf6 Qxf6 {1-0 Johansson,T (2237)-Denton,B Internet Section 07A g/8'+2" blitz 2004 (4)}) 11... e6 {White is slightly better.} 12. Nce4 Nxe4 13. Nxe4 {A sharp opening} Nb6 14. Qf3 Qe7 15. Bd3 Nd7 16. Qe2 e5 17. dxe5 Nxe5 18. Nc3 {[#]} (18. Bxe5 $11 Qxe5 (18... Bxe5 19. Rad1 $15) 19. Rad1) 18... Nxd3 (18... Bg4 $1 $17 {[%cal Rg4e2]} 19. Qc2 Nxd3 20. Qxd3 Qg5) 19. Qxd3 $15 Bf5 {This pair of bishops is nice.} 20. Qe2 Rad8 21. Rfd1 {Prevents Bd3} Qb4 22. Na4 {White is weak on the light squares} b5 23. Bxg7 Kxg7 24. Qb2+ Kg8 25. a3 ({Better is} 25. Nc3 $11) 25... Qg4 {Black attacks} 26. f3 (26. Nc3 $15) 26... Qg5 $17 27. e4 (27. Nc5 $17) 27... Be6 $2 (27... Rxd1+ $19 28. Rxd1 Qe3+ 29. Qf2 Qxf2+ (29... Qxb3 $2 30. Nb2 $19) 30. Kxf2 bxa4 31. exf5 axb3) 28. Nc3 $15 Qe3+ 29. Kh1 h5 $36 {[%mdl 2048] White is under pressure. Black has more active pieces.} 30. Re1 (30. b4 $15) 30... Rd2 $1 $19 31. Rxe3 Rxb2 32. b4 Rd8 33. Re2 Rb3 34. Re3 Rd2 35. Re2 $2 (35. h4 {was worth a try.}) 35... Rd3 36. Nd1 Rxa3 37. Rb1 Rab3 {Black is clearly winning.} 38. Rc1 Rxb4 39. Nf2 {[#]} Rc3 {[%mdl 512]} 40. Ra1 {[#]} (40. Rd1 a5) 40... a5 $1 41. Nd1 (41. h3 a4) 41... Rcb3 {Weighted Error Value: White=0.42/Black=0.17 (very precise)   Mistake:       	White=6     	Black=2      Inaccurate:     	White=3     	Black=1      OK:         	White=8     	Black=17     Best:        	White=3     	Black=1      Strong:       	---       	Black=1} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "1"]
[White "Da Silva, Matheus Pelegrino"]
[Black "Grillo, Carlos Henrique Gome"]
[Result "*"]
[Annotator "RC"]
[ECO "D94"]
[WhiteElo "1786"]
[BlackElo "1982"]
[PlyCount "58"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 Nf6 2. Nc3 d5 3. e3 g6 4. d4 Bg7 5. Nf3 O-O 6. Bd3 c6 7. O-O Nbd7 8. b3 Re8 9. Bb2 dxc4 10. Bxc4 Qc7 11. Ng5 e6 12. Nce4 Nxe4 13. Nxe4 Nb6 14. Qf3 Qe7 15. Bd3 Nd7 16. Qe2 e5 17. dxe5 Nxe5 18. Nc3 Nxd3 19. Qxd3 Bf5 20. Qe2 Rad8 21. Rfd1 Qb4 22. Na4 b5 23. Bxg7 Kxg7 24. Qb2+ Kg8 25. a3 Qg4 26. f3 Qg5 27. e4 Be6 28. Nc3 Qe3+ 29. Kh1 a5 *

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "2"]
[White "Perdomo, Leandro"]
[Black "Pironti, Francisco Ferrari"]
[Result "1-0"]
[Annotator "TA"]
[ECO "D55"]
[WhiteElo "2364"]
[BlackElo "2020"]
[PlyCount "95"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,95,6,0,4,12,8,12,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,104,107,74,0,0,0,0,-25,178,176,160,143,162,79,166,156,139,128,306,296,277,264,480,420,781,767,467,504,508,477,737,759,656,710,875,691,848,837,1160,1064,12789,5707,4979,3208,29981,29982,29982,-5097]} 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bxf6 Bxf6 7. e3 O-O 8. Rc1 c6 9. Bd3 Nd7 10. O-O dxc4 11. Bxc4 e5 {11...c5 is more fashionable.} 12. Ne4 exd4 13. Nxd4 {D55: Queen's Gambit Declined: 4 Bg5 Be7: Lines without ...h6 and 6...h6 7 Bxf6.} Qe7 14. Nxf6+ Nxf6 15. Qc2 {The position is equal.} c5 16. Ne2 b6 17. Nf4 $146 (17. Rfd1 Bb7 18. Ng3 Rad8 19. Rxd8 Rxd8 20. Rd1 Rxd1+ 21. Qxd1 g6 22. Qd3 Kg7 23. Qc3 {½-½ Zakharov,Y (2235)-Maylott,P (2034) RUS-AUS/NZ email 2014 [43]}) 17... Rd8 18. Rfd1 Bb7 19. a4 Rxd1+ 20. Rxd1 Rd8 21. Rxd8+ Qxd8 22. f3 Qd6 23. Qb3 Qd7 24. Ng6 Qe8 {Dodges Ne5} (24... Qd2 $11 25. Bxf7+ Kh7 26. Bg8+ Nxg8 (26... Kxg6 27. Qf7+ Kg5 28. Qxg7+ Kf5 29. g4+ Nxg4 30. Qxg4+ Kf6 31. Qe6+ Kg5 32. h4+ Kxh4 33. Qg4#) 27. Nf8+ Kh8 28. Ng6+ Kh7) 25. e4 $16 Qd7 26. e5 (26. Kh1 $16) 26... Ne8 $1 $11 27. h4 Nc7 28. h5 Bc6 $2 {[#]} (28... Ba6 $11 29. Bxa6 Nxa6) 29. Bxf7+ $1 $18 {[%mdl 512]} Qxf7 30. Ne7+ Kf8 31. Qxf7+ Kxf7 32. Nxc6 {[%mdl 4096] Endgame KN-KN. White is a pawn up.} Ke6 33. f4 {White is more active.} (33. Nxa7 Kxe5 34. Kf2 c4 $14) 33... Nd5 $2 (33... b5 $16) 34. g3 (34. Nxa7 Nxf4 35. g3 (35. Nc8 Nd5 $15) 35... Nd5 $11 (35... Nxh5 36. Kg2 $17)) 34... a6 35. Kf2 Kd7 $2 (35... c4 36. Ke2 Nc7) 36. Nb8+ Kc8 (36... Ke7 $142 37. Nxa6 c4) 37. Nxa6 Kb7 {[#]} 38. Nxc5+ $1 {[%mdl 512]} bxc5 {[%cal Bb6c5,Bc5c4][%mdl 32] KN-KP} 39. Kf3 Kc6 (39... Nc7 $142 40. Kg4 Kb6) 40. Ke4 Nb4 41. g4 {[%cal Bg3g4,Bg4g5][%mdl 32]} c4 42. Kd4 Nd3 43. f5 (43. Kxc4 Nxb2+ 44. Kd4 (44. Kb3 Nd3 $11) 44... Nxa4 $11) 43... Nxb2 {[#]} 44. g5 $1 {[%mdl 512] And now f6 would win.} Nd3 (44... c3 45. Kxc3) 45. f6 (45. Kxc4 $2 Nxe5+ 46. Kd4 Nf3+ 47. Ke4 Nxg5+ 48. Ke5 Nh7 $19) 45... gxf6 46. exf6 {White wants to mate with g6.} (46. Kxc4 $2 Nxe5+ 47. Kd4 hxg5 $19) 46... hxg5 47. h6 ({Stronger than} 47. Kxc4 Ne5+ 48. Kd4 Nf7 $11) (47. f7 Nc5 48. h6 (48. f8=R $2 {loses.} Ne6+ 49. Kc3 Nxf8 $19) (48. f8=N g4 $16) (48. Kxc4 Nd7 $18) 48... Ne6+ 49. Kxc4 Nf8 $18) 47... Nf4 48. Ke4 $4 {[%mdl 40960] Weighted Error Value: White=0.09 (flawless) /Black=0.89 Sensor Board Error (Ke4/e5)?  Loses game:     	---       	Black=2      Mistake:       	White=1     	Black=4      Inaccurate:     	---       	Black=1      OK:         	White=10    	Black=10     Best:        	White=6     	Black=1      Strong:       	---       	Black=1      Brilliant:      	White=1     	---} (48. h7 Ng6 49. f7 (49. Kxc4 g4 $18) 49... g4 50. h8=Q (50. Kxc4 Ne5+ 51. Kd4 Nxf7 $11) 50... Nxh8 51. f8=Q c3 52. Qxh8 c2 53. Qc8+ Kd6 54. Qxc2 (54. Qxg4 c1=Q $11)) 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "2"]
[White "De Siqueira, Luigy Lira"]
[Black "Seccafim, Caic dos Santos"]
[Result "0-1"]
[Annotator "TA"]
[ECO "C13"]
[WhiteElo "2252"]
[BlackElo "1999"]
[PlyCount "62"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 14,61,23,22,37,4,22,-12,33,18,43,38,51,43,131,139,137,127,129,133,295,289,634,623,636,244,623,620,368,568,1574,1479,29988,29989,29989,29990,29990,29991,29991,29992,29992,29993,29993,29994,29994,29995,29999,-29999,29999,-29999]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 gxf6 7. Nf3 f5 8. Nc3 a6 {C13: French: Classical System: 4 Bg5 Be7, Alekhine-Chatard Attack.} 9. Bd3 c5 10. dxc5 Bxc5 {The position is equal.} 11. Qe2 {[%cal Oe2e5]} Qe7 12. O-O-O Nc6 13. Rhe1 {[%cal Od3f5] and Bxf5! should not be overlooked. White has strong rooks and is better} O-O {[#]} (13... Bb4 $14) 14. Bxf5 $146 (14. Kb1 Kh8 15. h4 Qf6 16. Ng5 Nd4 17. Qf1 Bb4 18. Nce4 fxe4 19. Nxe4 Qg7 20. c3 {0-1 Makarenko,A (2285)-Lenderman,A (2623) Titled Tuesday intern op 2nd Febr blitz 2016 (3)}) 14... exf5 {[#]} 15. Qc4 $36 {[%mdl 2048] Black is under strong pressure.} b5 {[#]} 16. Qf4 (16. Qd5 $2 Be6 17. Rxe6 (17. Qxc6 $2 Rfc8 $17) 17... fxe6 $19) 16... Qf6 $2 (16... Qa7 $16 {is a better defense.}) 17. Ne4 $18 Qe7 (17... fxe4 $2 18. Qxf6 Ne7 19. Ng5 $18 (19. Rxe4 Ng6 $18)) (17... Qg7 18. Nxc5 Ra7) 18. Nxc5 Qxc5 19. Qg5+ Kh8 {[%cal Of7f6]} 20. Qh6 {White threatens Ng5 and mate.} Nb4 {[%csl Gb4][%cal Rc5c2]} 21. c3 ({And not} 21. Qf6+ Kg8 22. Qg5+ Kh8 23. Qf6+ Kg8 24. Qg5+ Kh8 25. Qf6+ $11) 21... f6 {[%cal Of5f4] [#] Hoping for ...f4!. Repels Ng5} 22. Rd8 $1 {[%mdl 512]} Be6 (22... Rxd8 23. Qxf6+) 23. Qxf6+ Kg8 24. Qxe6+ Kh8 25. Qf6+ Kg8 26. Qg5+ Kh8 27. Rd7 {[%csl Gd7][%cal Rg5g7]} Nxa2+ {Black is weak on the dark squares} 28. Kb1 {[%csl Gd7][%cal Rg5g7]} Nxc3+ 29. Ka1 {[%csl Gd7][%cal Rg5g7]} Qb4 30. Qh6 $4 {[%mdl 8192]} (30. Qg7# {was the only winning move.}) 30... Qc4 $4 {[%mdl 8192]} 31. Rdd1 $4 {[%mdl 8192]} (31. Qxh7#) 31... Qa2# {Quite a comeback for Black.   Weighted Error Value: White=0.04 (flawless) /Black=1.35  Loses game:     	---       	Black=1      Mistake:       	---       	Black=2      Inaccurate:     	White=2     	Black=2      OK:         	White=4     	Black=2      Best:        	White=2     	Black=1      Brilliant:      	White=2     	---} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "2"]
[White "Cunha, Lucas Aguiar"]
[Black "Kayser, Gustavo Warmling"]
[Result "1-0"]
[Annotator "TA"]
[ECO "B30"]
[WhiteElo "2222"]
[BlackElo "2036"]
[PlyCount "37"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,37,35,41,27,13,2,19,-2,1,8,129,106,169,154,241,238,287,280,283,261,259,243,504,505,585,571,1089,1079]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nc3 Qc7 5. O-O Nd4 6. Re1 a6 7. e5 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} Nxb5 8. exf6 Nxc3 9. fxg7 {The position is equal.} ({Of course not} 9. dxc3 gxf6 10. b4 d6 $15) 9... Bxg7 {A sharp opening} 10. dxc3 e6 (10... d6 $11) 11. Ng5 $146 {[%cal Bf3g5,Bg5e4,Be4g3,Bg3h5,Bh5g7,Bg7e8][%mdl 32] White is more active.} (11. Qd5 O-O 12. Qh5 f5 13. Bh6 Qd8 14. Ng5 Bxh6 15. Qxh6 Qe7 16. f4 b5 17. Re3 {1-0 Sukhachev,M (2075)-Shishigin,D RUS-ch U14 Dagomys 2004 (5)}) 11... h6 {[#]} (11... h5 $16) 12. Ne4 $1 $18 Ke7 {Dodges Nd6} (12... Be5 $16 13. Qh5 d6 (13... d5 $2 14. Ng3 $18)) 13. Ng3 Kf8 14. Nh5 d5 15. Qg4 f5 16. Qh4 e5 {[#] Wards off Bf4} (16... Rh7 {keeps fighting.} 17. Bf4 Qe7) 17. Bf4 $1 {[%mdl 512] Hoping for Nxg7. White is clearly winning.} exf4 (17... Qe7 18. Qxe7+) 18. Nxg7 Kf7 {[#] Prevents Qf6+.} 19. Ne8 $1 {[%mdl 512] Black got outplayed after the opening.   Weighted Error Value: White=0.06 (flawless) /Black=0.88  Mistake:       	---       	Black=4      Inaccurate:     	---       	Black=1      OK:         	White=4     	Black=3      Best:        	White=3     	Black=1      Strong:       	White=1     	---        Brilliant:      	White=1     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "2"]
[White "Saito, Vinicius"]
[Black "Santiago, Yago De Moura"]
[Result "0-1"]
[Annotator "TA"]
[ECO "C11"]
[WhiteElo "2091"]
[BlackElo "2451"]
[PlyCount "52"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,52,5,1,4,2,14,0,18,0,0,-6,13,-37,-73,-97,-95,-121,-92,-106,-106,-134,-102,-95,-81,-139,-129,-145,-129,-130,-97,-110,-105,-120,-129,-229,-189,-425,-291,-427,-418,-400,-403]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nce2 c5 6. c3 Nc6 7. Nf3 Qa5 {C11: French: Classical System: 4 e5 and 4 Bg5 dxe4.} 8. a3 cxd4 {8...Be7 injects fresh life into this line.} 9. b4 (9. Nexd4 Ndxe5 10. Nxe5 Nxe5 $15) 9... Qc7 {The position is equal.} 10. cxd4 ({Reject} 10. Nexd4 Ndxe5 (10... Ncxe5 11. Nb5 $17) 11. Bf4 Bd7 12. Nxc6 Nxf3+ 13. Qxf3 Qxc6 $17) 10... b5 11. Nf4 Qb6 12. h4 (12. Rb1 $11) 12... a5 $15 13. Rb1 $146 (13. bxa5 Qxa5+ 14. Bd2 Qb6 15. Bc3 Rxa3 16. Rxa3 Bxa3 17. Qb3 b4 18. Ba1 Ba6 19. Nh5 Bxf1 20. Kxf1 Qb5+ 21. Kg1 Qc4 22. Qb1 g6 23. Nf4 Ndxe5 {0-1 Ulloa,G (2068)-Belmonte,D (2309) Florianopolis op 5th 2019 (5)}) 13... axb4 14. axb4 Bxb4+ 15. Bd2 Bxd2+ 16. Qxd2 b4 17. Be2 Ba6 18. Rh3 (18. Bxa6 $142 Qxa6 19. Nh5) 18... Bxe2 19. Nxe2 Ra3 20. Rg3 Rg8 21. Qc2 g6 22. h5 Qa6 {Black is more active.} 23. hxg6 (23. Qc1 $17 {might work better.}) 23... hxg6 {Hoping for ...Ra2.} 24. Nd2 $2 {[#]} (24. Rh3) 24... Qxe2+ $3 $19 {[%mdl 512]} 25. Kxe2 Nxd4+ 26. Kd1 Nxc2 {Weighted Error Value: White=0.43/Black=0.10 (very precise)   Mistake:       	White=4     	---        Inaccurate:     	White=1     	---        OK:         	White=4     	Black=9      Best:        	White=4     	Black=2} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "2"]
[White "Blanco Amaro, Guillermo J."]
[Black "Silva, Caio Henrique Angeli"]
[Result "0-1"]
[Annotator "TA"]
[ECO "B12"]
[WhiteElo "2075"]
[BlackElo "2197"]
[PlyCount "90"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,89,0,0,-1,0,0,0,0,0,0,0,0,0,-65,-72,-67,20,24,26,32,50,48,77,0,140,150,162,39,131,71,66,45,50,56,46,43,46,0,0,0,0,-6,0,-8,-12,-410,-377,-400,-360,-1847,38,31,47,49,39,37,42,18,58,0,93,54,50,52,208,208,208,200,179,0,0,0,0,-69,-84,-76,-80,-75,-78,-128,-87,-29999]} 1. e4 c6 2. d4 d5 3. e5 c5 4. dxc5 e6 5. a3 Bxc5 6. b4 {B12: Caro-Kann: Advance Variation.} Be7 7. Nf3 a5 8. b5 {The position is equal.} Nd7 9. Bd3 f6 10. Bb2 Nh6 11. O-O (11. Qe2 $11) 11... Nf7 $1 $15 12. c4 Ndxe5 $146 ({Black should try} 12... fxe5 $15 13. Nc3 Nf6) (12... fxe5 13. cxd5 exd5 14. Bf5 d4 15. Re1 Qc7 16. Nxd4 exd4 17. Qxd4 Nf6 18. b6 Qd6 {0-1 Ingunza Curro,A (2367)-Souleidis,G (2429) Titled Tuesday intern op 30th Aug Late blitz 2022 (8)}) 13. Nxe5 $11 fxe5 14. Nc3 {White sacrificed a pawn} b6 15. Qf3 $1 {[%cal Rc4d5]} Bb7 16. Qg4 (16. cxd5 $16 Bc5 (16... exd5 17. Rad1 $14) 17. Rad1 (17. Be4 O-O $11)) 16... Qd6 (16... d4 $11 {remains equal.} 17. Ne4 O-O) 17. Qxg7 $16 Rf8 18. Rac1 (18. Bxh7 $6 d4 $16) (18. Qxh7 $2 Rh8 19. Qg7 e4 $19) (18. Na4 $18) 18... Bg5 (18... e4 $6 19. Be2 $16) (18... O-O-O $1 $14) 19. Rcd1 (19. cxd5 $142 $1 exd5 20. Rc2) 19... O-O-O 20. cxd5 (20. Bxh7 d4 $11) (20. Qxh7 Bf4 21. c5 bxc5 $17 (21... Qxc5 22. Ne2 $17)) (20. Be4 $5) 20... exd5 21. Bf5+ (21. Be4 $5 d4 22. Bxb7+ Kxb7 23. Qxh7 $11) 21... Kb8 22. Ne4 $1 (22. Qxh7 d4 23. Ne4 Qd5 $11) 22... Qh6 23. Bxe5+ (23. Qxh7 Qxh7 (23... dxe4 $2 24. Rxd8+ Bxd8 25. Bxe4 $19) 24. Bxh7 dxe4 $19) ({Better is} 23. Qxh6 $1 $14 Bxh6 24. Nf6) 23... Nxe5 $11 24. Qxe5+ Ka7 {Chess con chili.} 25. Ng3 $1 Bf4 26. Qe6 Qg5 27. Bxh7 $2 {[%mdl 8192]} (27. Bc2 $11 {and White stays safe.}) 27... Rd6 $19 28. Qe2 {[#]} Rh6 29. Bc2 $2 {[#]} (29. Qd3 Qh4 (29... d4 30. h3 $11) 30. h3 Rxh7 31. Nf5) 29... Rfh8 $2 (29... Rxh2 $1 $19 {( -> ...Qh4)} 30. Kxh2 Qh4+ 31. Kg1 Rh8) 30. h3 $14 Rg8 31. Bf5 $1 Bxg3 32. fxg3 Qxg3 33. Qf3 {Threatening Qxg3.} Qd6 34. Bg4 (34. Qf4 $1 $14) 34... Rh4 (34... Qc5+ $11 35. Rf2 Qxb5) 35. Qf4 Qxa3 36. Qd4 $1 Qb3 $2 (36... Rxh3 $14 37. Bxh3 (37. gxh3 Qg3+ 38. Kh1 Rxg4 $11) 37... Qxh3) 37. Ra1 $18 Qxb5 38. Rfb1 Qa6 39. Qf2 $2 (39. Rxa5 $18 Qxa5 40. Ra1 Qxa1+ 41. Qxa1+ Kb8 42. Qd4 (42. Qf6 Rgxg4 43. hxg4 Rxg4 $18)) 39... Rhxg4 40. hxg4 Rxg4 {...d4 would now be deadly.} 41. Ra3 (41. Rb2 $11) 41... d4 $15 42. Rg3 Rxg3 43. Qxg3 Qe2 44. Rb3 (44. Qf2 $142 Qc4 45. Rf1) 44... d3 {Black is more active.} 45. Qh2 $2 {[%mdl 8192]} (45. Rxd3 $17 Bxg2 46. Rd7+ Bb7 47. Rd8) 45... Qe1# {A wild game.   Weighted Error Value: White=0.65/Black=0.33  Loses game:     	White=2     	---        Missed win:     	White=1     	Black=1      Mistake:       	White=9     	Black=5      Inaccurate:     	White=1     	Black=1      OK:         	White=6     	Black=16     Best:        	White=2     	Black=6      Strong:       	White=5     	Black=1} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "2"]
[White "Lima, Kleyton Alcantara"]
[Black "Guimaraes, Diogo Duarte"]
[Result "1-0"]
[Annotator "TA"]
[ECO "A84"]
[WhiteElo "2068"]
[BlackElo "2299"]
[PlyCount "53"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,52,57,63,76,89,85,94,95,91,88,60,60,61,57,60,54,47,56,44,41,44,65,74,217,222,484,479,800,791,725,675,1507,1503,1490,1466,1341,447,2941,2699,29988,1675,29999]} 1. d4 f5 2. c4 Nf6 3. Nc3 e6 4. Nf3 Be7 5. Qc2 d5 6. Bf4 c6 7. e3 Nbd7 {A84: Dutch Defence: 2 c4 Miscellaneous.} 8. cxd5 Nxd5 9. Nxd5 exd5 {White is better.} 10. Bd3 $146 {White is more active.} (10. Qxf5 Nf6 11. Qc2 Qa5+ 12. Kd1 Ne4 13. Bd3 Bf5 14. Ke2 Rc8 15. Nd2 Bg4+ 16. f3 Qxd2+ 17. Qxd2 Nxd2 18. Kxd2 {1-0 Khamitskiy,S (2287)-Shaida,G (1180) BLR-chT Minsk 2017 (7.2)}) 10... Qa5+ 11. Nd2 Nf6 12. O-O {[%cal Od2b3]} ({Don't play} 12. Bxf5 Bxf5 13. Qxf5 Ne4 $11) 12... g6 13. a3 O-O 14. b4 Qb6 15. Nb3 Ne4 16. f3 Nd6 17. e4 fxe4 {Loses the game.} (17... Rf7 $16) 18. fxe4 $18 Nxe4 $2 (18... Be6 {might work better.}) 19. Bxe4 dxe4 {[#]} (19... Rxf4 $142 20. Rxf4 Bg5) 20. Qc4+ $1 Kg7 21. Be5+ Kh6 22. Rxf8 Bxf8 {Black is weak on the dark squares} 23. Qf7 {Intending Bf4+ and mate.} Qd8 24. Rf1 (24. Bf4+ $142 g5 25. Be5) 24... Bg4 (24... Qe7 $142) 25. Bf4+ g5 26. Bc7 (26. Be5 $142 Bf3 27. Qe6+ (27. gxf3 Qe8 $18) 27... Kh5 28. g4+ (28. gxf3 Qe7 $18) 28... Kh4 29. Qf7 Kxg4 30. Rxf3 (30. Qxh7 Bh6 $18) 30... Qf6 31. Rxf6 h6 32. Qe6+ (32. Qxb7 Kh4 33. Bg3+ Kh3 34. Qf7 Kg4 35. Qe6+ Kh5 36. Qh3#) 32... Kh4 33. Bg3+ Kh5 34. Qh3#) 26... Qf6 27. Rxf6# {Weighted Error Value: White=0.36/Black=1.40  Mistake:       	---       	Black=3      Inaccurate:     	White=1     	Black=1      OK:         	White=4     	Black=4      Strong:       	White=1     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "2"]
[White "Grillo, Carlos Henrique Gome"]
[Black "Luz, Arthur Nader"]
[Result "1-0"]
[Annotator "TA"]
[ECO "A37"]
[WhiteElo "1982"]
[BlackElo "2167"]
[PlyCount "119"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 26,119,-32,-32,-28,-35,-31,-34,0,0,0,0,0,-3,50,-29,115,112,118,51,27,0,63,59,70,66,88,81,79,79,100,107,107,107,102,102,103,98,135,100,97,97,161,191,233,222,210,177,298,294,341,313,341,335,327,239,271,0,350,355,398,402,396,303,292,273,296,288,290,296,287,278,290,240,329,224,315,259,520,524,360,205,307,290,1509,636,29986,29987,29994,29995,29995,29996,29997,29998,29998,29999]} 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 {[%cal Bg1f3,Bf3e1,Be1c2,Bc2e3][%mdl 32]} d6 6. d3 e5 7. O-O Nge7 8. a3 O-O 9. Rb1 a5 10. Ne1 Be6 11. Nc2 d5 12. cxd5 Nxd5 13. Ne3 Nde7 14. Nc4 Rb8 {A37: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3.} 15. Ne4 b6 16. f4 b5 $146 {Black is slightly better.} (16... a4 $5) (16... exf4 17. Bxf4 Rb7 {½-½ Baker,C (2282)-Lalic,B (2470) Coulsdon Jessie Gilbert 4th 2011 (9)}) 17. Nxe5 Nxe5 18. fxe5 Bxe5 19. Bh6 Bg7 (19... Bd4+ $11 20. Kh1 Nf5 21. Bxf8 Qxf8 (21... Ne3 22. Qd2 $11)) 20. Qc1 (20. Bxg7 $1 $14 Kxg7 21. Qc1) 20... Rc8 {[#]} (20... Bxh6 $1 $11 {remains equal.} 21. Qxh6 Nf5) 21. Bxg7 $1 $16 (21. Nxc5 $2 Rxc5 22. Qxc5 Bd4+ (22... Bxh6 $2 23. b4 $19) 23. Be3 Bxc5 $19) 21... Kxg7 {[#]} 22. Qf4 {White attacks} ({White should try} 22. b4 $1 $16) 22... f6 $14 23. Qd6 (23. Nxf6 $2 Ng8 $19) (23. Rbc1 {keeps more tension.} c4 24. Qf2 Bd5 25. Bh3) 23... Qxd6 ({Black should play} 23... Bd5 $11) 24. Nxd6 {White plays on the queen side and is better} Rb8 {[%cal Bc8b8,Bb8b6,Bb6d6,Bd6d5][%mdl 32]} 25. Nb7 $36 {[%mdl 2048] White has the initiative. White is more active.} Rfc8 26. Nxa5 c4 27. Rfc1 Rb6 28. b4 cxd3 29. Rxc8 Bxc8 30. exd3 Rd6 31. Rd1 Bf5 32. Bf1 Nd5 33. Kf2 {Repels Ne3} Nb6 (33... Re6 $16) 34. d4 $18 Bd7 35. Nb7 Rd5 36. Nc5 Bg4 (36... Bc6 $142 37. Ne6+ Kf7) 37. Rd2 Rf5+ 38. Kg1 Nc4 39. Bxc4 bxc4 {[%mdl 4096] Endgame KRB-KRN. White is a pawn up.} 40. Rf2 Rd5 41. Rd2 $2 (41. Rc2 $18) 41... Bf5 $2 {[%mdl 8192]} (41... c3 $2 42. Rc2 $18) (41... Rf5 $1 $11) 42. Na4 Bd3 43. Nc3 Rxd4 44. Kf2 Kf7 45. Ke3 Rd7 46. a4 {[%cal Ba3a4,Ba4a5][%mdl 32]} Ke7 47. b5 Kd8 48. a5 Kc7 49. g4 Kb7 50. Rb2 Ka7 (50... Kb8 51. b6 Rd6) 51. Na4 Re7+ $2 (51... Kb8 52. b6 c3 53. Nxc3 Ba6) 52. Kd4 Re4+ 53. Kd5 (53. Kc3 $142) 53... Re5+ (53... c3 {keeps fighting.} 54. Nxc3 Rc4) 54. Kd6 {Black must now prevent b6+.} ({Less strong is} 54. Kc6 Be4+ 55. Kd6 h5 $16) 54... Re2 $2 (54... Be4 55. b6+ (55. Re2 Kb8 $18) 55... Kb8) 55. Rb4 (55. Rxe2 $142 Bxe2 56. Kc7) 55... Rd2 56. Kc7 {White mates.} c3 {[%cal Bc4c3,Bc3c2][%mdl 32]} 57. b6+ Ka6 58. b7 c2 59. Nc5+ Kxa5 60. b8=Q {Weighted Error Value: White=0.33/Black=0.70  Loses game:     	---       	Black=1      Missed win:     	White=1     	---        Mistake:       	White=4     	Black=9      Inaccurate:     	White=2     	Black=4      OK:         	White=18    	Black=11     Best:        	White=3     	Black=1      Strong:       	White=1     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Santiago, Yago De Moura"]
[Black "Tsuboi, Edson Kenji"]
[Result "0-1"]
[Annotator "TA"]
[ECO "E20"]
[WhiteElo "2451"]
[BlackElo "2187"]
[PlyCount "40"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,40,-6,0,0,0,4,15,9,49,0,0,-20,-21,-15,-4,0,-11,-46,-33,-50,-52]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 c5 5. Nf3 {[%cal Bg1f3,Bf3d4,Bd4b3,Bb3c5][%mdl 32]} cxd4 6. Nxd4 O-O 7. Bg2 d5 8. cxd5 Nxd5 9. Bd2 Bxc3 10. bxc3 e5 11. Nb3 Nc6 12. c4 Nde7 13. O-O Be6 14. Nc5 {The position is equal.} Qc8 15. Qa4 (15. Bg5 $14) 15... Bh3 $11 16. Bc3 Bxg2 17. Kxg2 b6 18. Nd3 Qe6 19. Kg1 Nf5 20. Rfe1 Rfd8 {Weighted Error Value: White=0.15 (very precise) /Black=0.08 (flawless) .  Mistake:       	White=1     	---        Inaccurate:     	White=1     	Black=1      OK:         	White=3     	Black=4} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Silva Sanchez, Carlos"]
[Black "Poeta, Caio Medeiros"]
[Result "*"]
[Annotator "TA"]
[ECO "D12"]
[WhiteElo "2325"]
[BlackElo "2088"]
[PlyCount "24"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 14,24,28,29,38,6,8,0,18,9,32,16,29]} 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Bg6 7. Nxg6 {7.Be2 deserves study.} hxg6 8. Bd3 Bd6 {D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5.} 9. g3 Nbd7 10. Qb3 Qc7 $146 (10... Qb8 11. e4 e5 12. cxd5 exd4 13. Ne2 c5 14. f4 Nh5 15. e5 Nxe5 16. fxe5 Bxe5 {1-0 Wu,R (2037)-Cui,K (1800) British Columbia op 2014 (3.9)}) 11. Bd2 Ng4 12. cxd5 {Inaccurate:     	White=1     	---        OK:         	White=1     	---} exd5 {An uneventful encounter.   Weighted Error Value: White=0.12 (very precise) /Black=0.13 (very precise)} *

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Cruz De La, Noel"]
[Black "De Siqueira, Luigy Lira"]
[Result "*"]
[Annotator "TA"]
[ECO "C48"]
[WhiteElo "2288"]
[BlackElo "2252"]
[PlyCount "34"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 9,34,10,20,0,0,1,-4,-12,-4,-11,-10,-9,0,0,0,-12,-21,-52,77,-73,-12,-62,-16,-101,-92,-104,-97]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Bc4 c6 6. O-O {C48: Four Knights: 4 Bb5, replies other than 4...Bb4.} Bd6 7. Re1 $146 {[#] Threatens to win with Nxd4.} (7. d3 b5 8. Bb3 a5 9. a4 Nxb3 10. cxb3 b4 11. Ne2 Bc7 12. d4 d6 13. dxe5 dxe5 {½-½ Andreikin,D (2720)-Savchenko,B (2567) Moscow-ch blitz 69th 2015 (16)}) 7... O-O 8. Nxd4 {The position is equal.} exd4 9. e5 $1 Bxe5 10. Rxe5 dxc3 11. dxc3 d5 12. Be2 Ne4 $36 {[%mdl 2048] Black fights for an advantage.} 13. f3 Qf6 (13... f6 $1 $15 {stays ahead.} 14. Rh5 Nd6) 14. Rh5 (14. Qd4 $16 {is necessary to keep the advantage.} Nd6 15. Bd3) 14... Nd6 (14... g6 $17 {Threatens to win with ...Nxc3.} 15. Rh6 Nd6) 15. Bd3 (15. Qd4 $11 Qxd4+ 16. cxd4) 15... g6 (15... Bf5 $15) 16. Rh6 (16. Bg5 $11 {keeps the balance.} Qe5 17. Qd2) 16... Re8 $17 17. Bd2 {Mistake:       	White=3     	Black=3      Inaccurate:     	White=1     	---        OK:         	White=1     	Black=8      Strong:       	White=1     	---} Bf5 {Weighted Error Value: White=0.39/Black=0.28 (precise)} *

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Silva, Caio Henrique Angeli"]
[Black "Poeta, Caio Medeiros"]
[Result "1/2-1/2"]
[Annotator "TA"]
[ECO "D12"]
[WhiteElo "2197"]
[BlackElo "2088"]
[PlyCount "44"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,44,34,10,35,12,0,0,12,13,43,34,22,27,71,74,70,70,68,47,45,0,0,0,0,0,0,0,0,10,0,0,29]} 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Bg6 7. Nxg6 {7.Be2 might become the main line.} hxg6 8. Bd3 Bd6 {D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5.} 9. g3 Nbd7 10. Qb3 Qc7 $146 (10... Qb8 11. e4 e5 12. cxd5 exd4 13. Ne2 c5 14. f4 Nh5 15. e5 Nxe5 16. fxe5 Bxe5 {1-0 Wu,R (2037)-Cui,K (1800) British Columbia op 2014 (3.9)}) 11. Bd2 Ng4 12. cxd5 exd5 13. e4 Rxh2 14. Rxh2 Nxh2 15. Be2 {Repels Nf3+} Bxg3 $1 16. exd5 Bf4 17. Bxf4 Qxf4 {The position is equal.} 18. dxc6 bxc6 {[%cal Oa8d8] ...Rd8! would now be deadly.} 19. Qb7 {[%csl LRa8,LRc6]} Rb8 20. Qxc6 {[#] And now Nd5 would win.} Ng4 21. Qe4+ Qxe4 22. Nxe4 Ngf6 {Weighted Error Value: White=0.08 (flawless) /Black=0.11 (very precise)   Inaccurate:     	White=1     	Black=3      OK:         	White=4     	Black=2      Best:        	White=1     	Black=2      Strong:       	---       	Black=1} 1/2-1/2

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Marra, Eduardo da Costa"]
[Black "Grillo, Carlos Henrique Gome"]
[Result "1-0"]
[Annotator "TA"]
[ECO "C02"]
[WhiteElo "2195"]
[BlackElo "1982"]
[PlyCount "91"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 17,91,1,30,11,14,-7,1,-104,-5,-8,-8,-12,0,0,-6,-14,-5,-7,0,0,12,0,0,0,14,16,45,-34,57,-26,70,20,9,13,59,51,52,52,53,44,48,47,56,55,62,54,53,56,48,48,119,141,245,237,243,223,703,762,760,760,707,716,1048,941,562,465,5189,5189,29980,29981,29985,29986,29986,29987,29988,29989]} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Nh6 7. b4 cxd4 8. cxd4 Nf5 9. Be3 {is now debated instead of 9.Bb2.} Be7 10. Nc3 {C02: French: Advance Variation.} f6 11. Na4 Qd8 12. Bf4 {[#]} (12. exf6 $11 Bxf6 13. Bd3) 12... fxe5 $146 (12... g5 $1 $17 {[%cal Rg5f4]} 13. exf6 Bxf6 14. Nxg5 h5) (12... O-O 13. Bd3 Nfxd4 14. Nxd4 Nxd4 15. Bxh7+ Kxh7 16. Qxd4 Qe8 17. Nc5 b6 18. Nd3 Qg6 {0-1 Scheuermann,G (2150)-Katona,A Oberliga Sued W 0708 2007 (6.4)}) 13. Bxe5 $11 Nxe5 14. dxe5 O-O 15. Bd3 Bd7 16. O-O Rc8 17. Qb3 b5 18. Nc3 Qb6 {[%cal Of5e3]} 19. Rad1 g6 20. Qb2 a6 21. Ne2 Kg7 22. Rc1 (22. Qd2 $14) 22... Rxc1 ({Better is} 22... Ne3 $1 $15) 23. Rxc1 (23. Nxc1 $14 Nh4 24. Nd4) 23... Nh4 (23... Ne3 $1 $11) 24. Ned4 (24. Nfd4 $14) 24... Nxf3+ (24... Rf4 {keeps more tension.} 25. Qe2 Rf8 26. Nxh4 Qxd4 27. Nf3 Rc8) 25. Nxf3 Rc8 (25... a5 $11) 26. Rxc8 $14 Bxc8 27. Qc3 Bd7 {[%cal Oa6a5]} 28. Nd4 {[%cal Bf3d4,Bd4b3,Bb3c5][%mdl 32]} Qb8 29. Nb3 Qc8 30. Qd4 Qc7 31. h4 Be8 32. g3 Kg8 33. Kg2 Bd8 (33... Kg7 $14) 34. Nc5 $16 {White is more active.} Qc6 (34... Qb6 $16 {is a better defense.} 35. Qg4 Bf7) 35. Qg4 $18 {[%cal Oh4h5] h5! would now be deadly.} Bf7 36. h5 {[%cal Rh5g6]} Kg7 (36... g5 37. Qf3 (37. h6 Be7 $16) 37... h6) 37. hxg6 hxg6 {[#]} 38. Bxg6 $1 {[%mdl 512]} Bxg6 39. Nxe6+ ({Less strong is} 39. Qxe6 Qc7 $16) 39... Kh6 40. Qh3+ Bh5 41. Nxd8 Qc2 (41... Qg6 $142 42. Qe6 (42. Qh4 Kg7 $16) 42... d4) 42. Nf7+ Kg6 43. Qe6+ {White mates.} Kg7 44. Qf6+ Kg8 45. e6 {[%csl Gf7][%cal Rf6h8]} Qe4+ 46. Kh2 {Weighted Error Value: White=0.23 (precise) /Black=0.72  Mistake:       	White=4     	Black=7      Inaccurate:     	---       	Black=2      OK:         	White=9     	Black=6      Best:        	White=5     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Marra, Eduardo da Costa"]
[Black "Grillo, Juan Cruz"]
[Result "*"]
[Annotator "TA"]
[ECO "C02"]
[WhiteElo "2195"]
[BlackElo "2047"]
[PlyCount "38"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 17,38,-1,20,18,18,5,24,-97,0,-8,-14,-8,0,0,-9,-20,-25,-15,0,-3,20,0,4]} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Nh6 7. b4 cxd4 8. cxd4 Nf5 9. Be3 {is cutting edge theory.} Be7 10. Nc3 {C02: French: Advance Variation.} f6 11. Na4 Qd8 12. Bf4 (12. exf6 $11 Bxf6 13. Bb5) 12... fxe5 $146 ({Black should try} 12... g5 $17 13. exf6 Bxf6 14. Nxg5 O-O) (12... O-O 13. Bd3 Nfxd4 14. Nxd4 Nxd4 15. Bxh7+ Kxh7 16. Qxd4 Qe8 17. Nc5 b6 18. Nd3 Qg6 {0-1 Scheuermann,G (2150)-Katona,A Oberliga Sued W 0708 2007 (6.4)}) 13. Bxe5 $11 Nxe5 14. dxe5 O-O 15. Bd3 Bd7 16. O-O Rc8 17. Qb3 b5 {The position is equal.} 18. Nc3 Qb6 {[%cal Of5e3]} 19. Rad1 {Mistake:       	White=1     	Black=1      OK:         	White=3     	Black=4      Best:        	White=1     	---} g6 {Weighted Error Value: White=0.25 (precise) /Black=0.20 (precise)} *

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Aranha Filho, Alvaro Z."]
[Black "De La Paz Perdomo, Frank"]
[Result "*"]
[Annotator "TA"]
[ECO "A48"]
[WhiteElo "2178"]
[BlackElo "2445"]
[PlyCount "29"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 16,29,3,0,7,-12,-9,-27,-27,-31,-24,-32,-25,-68,-64,-87]} 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 O-O 5. c3 d6 6. e4 c5 7. dxc5 dxc5 8. Bc4 Nc6 9. O-O Qc7 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems.} 10. a4 h6 11. Bh4 Nh5 12. Bg3 Nxg3 13. hxg3 Rd8 $146 (13... Na5 14. Ba2 Bg4 15. Nc4 Rad8 16. Qe2 Nxc4 17. Bxc4 Rd7 18. Qe3 Bxf3 19. gxf3 Rfd8 {1-0 Kamsky,G (2676)-Jumabayev,R (2603) Corsica Masters KO 21st rapid 2017 (3.1)}) 14. Qc2 Na5 {Inaccurate:     	White=1     	---        OK:         	---       	Black=4} 15. Rfd1 {White did not feel at home in the position after the opening.   Weighted Error Value: White=0.17 (very precise) /Black=0.02 (flawless)} *

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Aranha Filho, Alvaro Z."]
[Black "Perdomo, Leandro"]
[Result "1/2-1/2"]
[Annotator "TA"]
[ECO "A48"]
[WhiteElo "2178"]
[BlackElo "2364"]
[PlyCount "34"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,34,-7,-8,-9,0,0,-33,-37,-27,-33,-29,-25,-61,-57,-74,-46,-39,-29,-25,-21]} 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 O-O 5. c3 d6 6. e4 c5 7. dxc5 dxc5 8. Bc4 Nc6 9. O-O Qc7 10. a4 h6 11. Bh4 Nh5 {Black is slightly better.} 12. Bg3 Nxg3 13. hxg3 Rd8 14. Qc2 Na5 15. Rfd1 Nxc4 16. Nxc4 Be6 17. Ne3 Rxd1+ {Weighted Error Value: White=0.12 (very precise) /Black=0.05 (flawless) .  Inaccurate:     	White=2     	Black=1      OK:         	White=2     	Black=4} 1/2-1/2

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Contreras Huaman, Fiorella"]
[Black "Lima, Kleyton Alcantara"]
[Result "1-0"]
[Annotator "TA"]
[ECO "C97"]
[WhiteElo "2170"]
[BlackElo "2068"]
[PlyCount "91"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,91,33,35,50,33,75,78,76,75,77,67,101,59,58,52,64,64,106,60,114,36,33,38,68,84,64,81,158,147,141,116,128,129,246,221,267,276,260,266,483,486,481,486,459,468,783,748,604,293,641,654,893,883,956,810,1681,1580,29989,29990,29990,29991,29991,29992,29996,29997,29997,29995,29998,29999]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 O-O 8. h3 d6 9. c3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 Nc6 {[%cal Ba5c6,Bc6b8,Bb8d7,Bd7f8,Bf8g6,Bg6f4][%mdl 32]} 14. d5 Nb8 15. a4 Bb7 {White is better.} 16. b3 Nbd7 17. Be3 Nf8 18. g4 Ng6 19. Ng3 bxa4 20. Rxa4 Reb8 21. Nf5 (21. g5 $16) 21... Bf8 ({Black should play} 21... h6 $14) 22. Nh2 (22. Nd2 $16) 22... Nd7 23. h4 Nf4 24. g5 Nb6 25. Ra2 Bc8 (25... a5 $142) 26. Bxf4 exf4 27. Ng4 $36 {[%cal Of5h6][%mdl 2048] White is on the roll.} c4 28. b4 {White has more active pieces.} Qb7 (28... Nd7 $16) 29. Qd4 Bxf5 30. exf5 {[%cal Be4f5,Bf5f6][%mdl 32]} Qxd5 31. Qxf4 Qb7 (31... Re8 32. Be4 Qb5) 32. f6 $18 {[%cal Og4h6] Intending Nh6+! and mate.} g6 {[#]} 33. h5 $1 {[%mdl 512]} Nd5 34. Qd4 (34. Qxc4 Rc8 35. Qe4 Qc6 $18) 34... Qd7 (34... Nxb4 $142 35. cxb4 Qxb4) 35. hxg6 hxg6 36. Nh2 (36. Bxg6 $142 Rb5 37. Bc2) 36... Nc7 $2 (36... Rb5 37. Ba4 (37. Qxc4 Qh3 $11) 37... Nxc3 38. Bxb5 (38. Qxc3 Rxg5+ 39. Kf1 Qb7 $16) 38... Nxb5 39. Qxc4 d5) 37. Kg2 ({Less strong is} 37. Qxc4 Re8 38. Rd1 (38. Rxe8 Rxe8 39. Bd3 d5 $16) 38... Qe6 $18) (37. Ng4 Re8 38. Raa1 Nb5 $16) 37... Qc6+ 38. Nf3 Ne6 39. Qh4 {White wants to mate with Rh1.} Rb5 40. Be4 d5 {[%cal Bd6d5,Bd5e4,Be4f3][%mdl 32] [#]} 41. Rh1 $1 {[%csl Gh1][%cal Rh4h7] White mates.} Nf4+ 42. Qxf4 dxe4 {[#]} 43. Qh4 $1 {[%csl Gh1][%cal Rh4h7]} exf3+ {[#]} (43... Rxg5+ 44. Nxg5) 44. Kf1 $1 {[%csl Gh1][%cal Rh4h7]} Bg7 45. Qh7+ Kf8 {[#]} 46. Qh8+ $3 {[%mdl 512] Weighted Error Value: White=0.21 (precise) /Black=0.59.  Mistake:       	White=2     	Black=5      Inaccurate:     	White=1     	Black=5      OK:         	White=10    	Black=6      Brilliant:      	White=1     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Labussiere, Yago"]
[Black "Cunha, Lucas Aguiar"]
[Result "0-1"]
[Annotator "TA"]
[ECO "E04"]
[WhiteElo "2123"]
[BlackElo "2222"]
[PlyCount "41"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,28,20,14,15,-4,37,13,15,-2,20]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 c5 4. O-O Nc6 5. d4 e6 6. c4 dxc4 7. Ne5 Bd7 8. Na3 {[%cal Bb1a3,Ba3c4,Bc4e5][%mdl 32]} cxd4 9. Naxc4 Rc8 10. Qb3 Nxe5 11. Nxe5 {[%cal Of1d1]} Bc6 {E04: Open Catalan: 5 Nf3.} 12. Rd1 {White sacrificed a pawn} Bc5 13. Nxc6 bxc6 14. e3 e5 {[%mdl 32768] Not much happened in this game.   Weighted Error Value: White=0.20 (precise) /Black=0.21 (precise)  Loss on time!?  Inaccurate:     	---       	Black=1} 15. exd4 $146 Bxd4 16. Be3 O-O 17. Qa4 c5 18. Qxa7 Nd5 19. Bxd4 exd4 20. Rac1 Qd6 21. Rd2 {0-1 Lipinsky,M (2131)-Di Benedetto,D (2029) Lugano New op-A 8th 2015 (6)} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Cruz, Natan Gomes"]
[Black "De Siqueira, Luigy Lira"]
[Result "0-1"]
[Annotator "TA"]
[ECO "C48"]
[WhiteElo "1967"]
[BlackElo "2252"]
[PlyCount "66"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,66,9,8,0,7,6,0,0,0,0,18,-7,0,0,0,-19,-36,-62,66,-62,-25,-67,-23,-78,-95,-93,-97,-166,-156,-187,-194,-172,-153,-182,-170,-171,-172,-195,-134,-205,-189,-219,-229,-316,-312,-325,-321,-336,-347,-664,-636,-624,-645,-5714,-5697,-1995,1016,-29999,962]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Bc4 c6 6. O-O Bd6 7. Re1 {[#] Black must now prevent Nxd4.} O-O 8. Nxd4 {The position is equal.} exd4 9. e5 $1 Bxe5 10. Rxe5 dxc3 11. dxc3 d5 12. Be2 Ne4 $36 {[%cal Oe4f2][%mdl 2048] Black fights for an advantage.} 13. f3 Qf6 (13... f6 $1 $15 14. Rh5 g6 15. fxe4 gxh5) 14. Rh5 ({Only move:} 14. Qd4 $14 Nd6 15. Bd3) 14... Nd6 (14... g6 {feels hotter.} 15. fxe4 gxh5 16. exd5 Re8) 15. Bd3 g6 16. Rh6 (16. Bg5 $11 {keeps the balance.} Qe5 17. Qd2 gxh5 18. Re1) 16... Re8 {Black converts the advantage convincingly.} 17. Bd2 Bf5 18. Qf1 (18. Bf1 $17) 18... Re6 $19 19. Re1 Rae8 20. Rxe6 Qxe6 (20... Rxe6 21. g4 Bxd3 22. cxd3) 21. Kf2 c5 {And now ...c4 would win. White is weak on the light squares} 22. g4 Bxd3 23. cxd3 f5 ({Black should try} 23... c4 $19 {[%cal Od5d4]} 24. Rh4 Qe5) 24. g5 (24. Rh4 $17) 24... Nf7 25. Rh4 Ne5 26. Kg3 Qa6 27. c4 Qxa2 28. Qe2 Re7 ({Resist} 28... Qxb2 29. d4 (29. f4 dxc4 30. fxe5 Rxe5 $19) 29... cxd4 30. cxd5 $19) 29. f4 $2 (29. cxd5 Qxd5 30. b4) 29... Nc6 30. Qf3 Qxb2 31. Qxd5+ Kg7 32. Qg2 {[#]} Qxd2 $4 {[%mdl 8192]} 33. Kf3 $4 {[%mdl 8192]} (33. Qxd2 $18 a5 34. Qb2+ Kg8 35. Qb6) 33... Qa2 $4 {[%mdl 40960] Weighted Error Value: White=0.79/Black=0.16 (very precise) .  Mistake:       	White=5     	Black=2      Inaccurate:     	White=3     	Black=2      OK:         	White=3     	Black=11     Best:        	White=1     	Black=2      Strong:       	White=1     	---       . Loss on time!?} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "3"]
[White "Ikejiri, Daniel Yoshito"]
[Black "Ribeiro, Matheus Mendes Domin"]
[Result "1/2-1/2"]
[Annotator "TA"]
[ECO "B60"]
[WhiteElo "1954"]
[BlackElo "2328"]
[PlyCount "131"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 14,129,62,58,56,-17,0,-4,-6,-7,0,-18,-15,-29,0,-3,28,-21,-4,-27,-37,-33,-41,-37,-26,-36,-32,-25,-31,-33,-24,-28,-15,-13,-12,-18,6,-15,-15,-47,-40,-43,-35,-42,-34,-42,-29,-43,-30,-27,0,0,9,0,0,-4,0,-8,-7,-79,-79,-83,-81,-100,-104,-100,-102,-105,-97,-98,-14,-22,0,-9,0,0,0,0,0,-13,-13,-12,-13,-13,-13,-17,-12,-13,-12,-13,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 {[%cal Bg1f3,Bf3d4,Bd4b3,Bb3d2,Bd2e4][%mdl 32]} Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Qa5 7. Bxf6 {7.Bb5 is not played anymore.} gxf6 8. Nb3 Qg5 $1 {[%mdl 4] outshines the older 8...Qd8. B60: Sicilian: Richter-Rauzer: Unusual Black 6th moves and 6...Bd7 without 7 Qd2.} 9. Qd2 (9. Nd5 $14) 9... Qxd2+ $11 10. Nxd2 f5 {Not much happening anymore. The position is equal.} 11. O-O-O Bg7 12. Nd5 {[#]} Rb8 $146 (12... Kd8 13. c3 Bh6 14. Ne3 fxe4 15. Nxe4 Kc7 16. Ng3 e6 17. Kb1 f5 18. Nc4 Rd8 {0-1 Zhurova,A (2181)-Yakimova,M (2231) Khanty-Mansiysk TOP 28 Blitz GP (Women) 2023 (5)}) 13. Bd3 fxe4 14. Nxe4 O-O 15. Bb5 (15. Kb1 {is superior.}) 15... Kh8 16. c3 e6 17. Bxc6 bxc6 18. Ne7 {[%cal Oe7c8] and Nxc8! would now be decisive} d5 19. Nxc8 $1 (19. Nxc6 $2 {perishes.} Rb6 20. Nxa7 dxe4 21. Nxc8 Rxc8 $19) 19... Rfxc8 20. Nd2 c5 21. Kc2 Rb6 22. Rb1 Rcb8 23. b3 Ra6 24. a4 Rc8 25. c4 Bh6 26. Ra1 Bxd2 27. Kxd2 dxc4 28. bxc4 $15 {[%mdl 4096] Endgame KRR-KRR} Rd8+ 29. Ke2 Rd4 30. Rhc1 Kg7 31. a5 Rad6 32. Rc2 Rd3 33. Rb1 Ra3 34. Rb5 Rc6 35. Rd2 Rc7 {Dodges Rd7} 36. Rd6 (36. Rdb2 $11) 36... Rc3 $17 37. a6 Rxc4 38. Rb7 Rxb7 39. axb7 {KR-KR. Black is a pawn up.} Rb4 40. Rc6 Rxb7 41. Rxc5 {[#]} Rd7 (41... Rb2+ $1 $17 42. Kf3 Ra2) 42. Ra5 $11 Kf8 43. Ke3 Ke8 44. g4 Kd8 45. f4 Kc8 46. Ke4 Kb7 47. Rh5 Kb6 48. f5 exf5+ 49. gxf5 a5 50. Rxh7 a4 51. Rh3 f6 52. Ra3 Kb5 53. Ra1 Re7+ 54. Kf4 Rh7 55. Kg3 Ra7 56. h4 Kb4 57. Kg4 a3 58. Kh5 Rg7 59. Kh6 Rg2 60. Rb1+ Kc3 61. Rb8 Rg3 62. Ra8 Kb2 {...a2 is the strong threat.} 63. Rb8+ $1 Ka1 64. h5 a2 65. Rb6 Rb3 66. Rxb3 {Weighted Error Value: White=0.09 (flawless) /Black=0.19 (very precise)   Mistake:       	White=3     	Black=1      Inaccurate:     	White=1     	Black=3      OK:         	White=28    	Black=22     Best:        	White=3     	Black=4      Strong:       	White=2     	---} 1/2-1/2

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Perdomo, Leandro"]
[Black "Ikejiri, Daniel Yoshito"]
[Result "1-0"]
[Annotator "TA"]
[ECO "D36"]
[WhiteElo "2364"]
[BlackElo "1954"]
[PlyCount "73"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,73,27,30,30,30,28,22,20,23,26,27,5,55,60,60,55,61,57,63,54,85,76,79,76,81,85,116,114,116,112,134,133,141,146,146,140,221,226,226,213,213,220,226,219,202,210,427,426,403,394]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 h6 8. Bh4 Re8 9. Nf3 Nbd7 10. Qc2 c6 11. O-O Ne4 12. Bxe4 Bxh4 13. Bh7+ Kh8 14. Nxh4 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2).} Qxh4 15. Bd3 Nf6 16. Rae1 $1 {[%mdl 4] The position is equal. is currently scoring better than 16.b4.} Bd7 17. f3 Rad8 18. b4 $146 (18. Qf2 {simplifies} Qxf2+ 19. Kxf2 g6 20. b4) (18. Qf2 Qxf2+ 19. Kxf2 b6 20. b4 c5 21. bxc5 bxc5 22. dxc5 Rc8 23. Nb5 Rxc5 24. Nd6 {0-1 Navara,D (2689)-Le,Q (2728) Biel Blitz 56th 2023 (2)}) 18... b5 (18... Qg5 $11) 19. a4 $14 a6 20. Qf2 Qxf2+ 21. Kxf2 Re7 22. Ra1 Be6 23. axb5 axb5 24. Ra6 Rc7 25. Rc1 {[%cal Oc3b5] Nxb5! is the strong threat.} Rcc8 26. Nb1 {[%cal Bc3b1,Bb1d2,Bd2b3,Bb3c5,Bc5d3][%mdl 32]} Bd7 27. Nd2 $36 {[%mdl 2048] Keeping Black busy.} Ra8 28. Rca1 {[%cal Bc1a1,Ba1a6,Ba6a8][%mdl 32] White is more active.} Rxa6 29. Rxa6 Kg8 30. Nb3 g6 (30... Be8 $16 31. h4 h5) 31. Nc5 $18 Be8 32. Bxb5 Rb8 33. Bxc6 Rxb4 34. Ra8 Kf8 35. Nd3 {Prevents Rb2+.} Rc4 {[#]} (35... Rb6 {was called for.}) 36. Bxe8 Nxe8 37. Nf4 {Weighted Error Value: White=0.02 (flawless) /Black=0.22 (precise)   Mistake:       	---       	Black=3      Inaccurate:     	---       	Black=2      OK:         	White=11    	Black=8      Best:        	White=3     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "De Siqueira, Luigy Lira"]
[Black "Marra, Eduardo da Costa"]
[Result "1-0"]
[Annotator "TA"]
[ECO "C45"]
[WhiteElo "2252"]
[BlackElo "2195"]
[PlyCount "97"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,97,-9,-5,0,-4,0,4,0,0,0,0,0,6,0,7,21,20,20,19,0,58,-15,58,-13,12,-34,23,0,2,5,7,0,0,0,0,0,0,0,36,14,18,0,0,0,0,0,60,71,66,0,0,0,0,0,133,134,146,110,129,115,172,132,173,182,282,264,447,459,454,445,985,964,973,948,925,906,1441,1441,29980,29982,29979,29980,29989,29990,29990,29983,29983,29984]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Nd2 d5 7. exd5 {C45: Scotch Game.} cxd5 8. Bb5+ Bd7 9. Bxd7+ {The position is equal.} Qxd7 10. O-O Be7 11. b3 O-O {[%cal Bh8f8,Bf8e8,Be8e4][%mdl 32]} 12. Bb2 Qf5 13. Re1 $1 {[%mdl 4] now scores much better than the old 13.Nf3.} Bd6 14. Nf3 $146 (14. Qf3 Qxc2 15. Bxf6 Qxd2 16. Rad1 Qh6 17. Be5 Bxe5 18. Rxe5 c6 19. Rde1 Qd6 20. g3 {½-½ Hou,Y (2632)-Harika,D (2509) Speed Chess (Women) blitz 2023 (3.19)}) 14... Rfe8 15. Qd2 Rad8 (15... Ne4 $11 16. Qd4 Bf8) 16. Rad1 (16. Nh4 $14 Qh5 17. Bxf6 gxf6 18. Rxe8+ Rxe8 19. Nf3) 16... h6 (16... Ne4 $11 17. Qd4 Bf8) 17. a4 (17. Nh4 $14 Qg5 18. Qxg5 hxg5 19. Nf5) 17... Re4 18. h3 (18. Bd4 $11) 18... c5 (18... Bb4 $15 19. Bc3 Be7) 19. Kf1 d4 20. Rxe4 Nxe4 (20... Qxe4 {simplifies} 21. Qd3 Qxd3+ 22. Rxd3 Nd5) 21. Qa5 {[%csl LRa7,LRd8]} Qd7 22. Re1 Re8 {[%cal Bd8e8,Be8e6,Be6d6][%mdl 32]} 23. Qa6 Qe6 24. Qd3 {Against Nd2+} Qf5 25. Kg1 (25. b4 $5) 25... Qg6 26. c3 Re6 {[#] Strongly threatening ...Ng5.} 27. Rd1 $1 (27. cxd4 Ng5 28. Rd1 (28. Ne5 $2 Rxe5 29. dxe5 Qxd3 $19) 28... Nxh3+ 29. Kf1 Qh5) 27... dxc3 28. Bxc3 Bg3 29. fxg3 $14 Rd6 30. Qc2 (30. Bd4 $1 $14 Nxg3 (30... cxd4 31. Nh4 $15) 31. Qxg6 fxg6 32. Kf2 Ne4+ (32... Nf5 33. b4 $16) 33. Ke2 (33. Ke3 Nf6 $16) 33... cxd4 34. Rxd4) 30... Nxc3 $11 31. Rd2 Rxd2 32. Qxd2 {[%mdl 4096] Endgame KQN-KQN} Qf6 (32... Ne4 $11 {remains equal.} 33. Qd8+ Kh7) 33. Qe3 $16 {Black is now going downhill.} a6 34. Qxc5 g6 35. Kh2 Ne4 (35... h5 $16 36. Qc8+ Kh7) 36. Qc8+ Kh7 37. Qc4 Qe7 (37... Qe6 {keeps fighting.}) 38. b4 $18 (38. Qxa6 $6 Qc7 $18) 38... f5 $2 (38... Qe6 39. Qxe6 fxe6) 39. b5 (39. Qxa6 Qc7 $18) 39... axb5 40. axb5 {[%cal Ba4b5,Bb5b6,Bb6b7][%mdl 32]} Qd6 (40... Nd6 $142 41. Qc5 Qe6 42. Qc7+ Kg8) 41. Qf7+ Kh8 42. Qe8+ Kg7 43. Ne5 {Qf7+ would kill now.} Kf6 {[#]} 44. b6 $1 Qa3 (44... Qb4 45. Qh8+) 45. Nd7+ {White mates.} Kg7 46. Qe5+ Kh7 47. b7 f4 48. Nf6+ (48. b8=B $2 {loses.} fxg3+ $19) 48... Nxf6 49. Qc7+ {Weighted Error Value: White=0.13 (very precise) /Black=0.63  Mistake:       	White=4     	Black=9      Inaccurate:     	---       	Black=2      OK:         	White=16    	Black=9      Best:        	White=1     	Black=2      Strong:       	White=1     	---} (49. b8=B Qxg3+ 50. Kh1 Nd5 $11) 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Cunha, Lucas Aguiar"]
[Black "Contreras Huaman, Fiorella"]
[Result "0-1"]
[Annotator "TA"]
[ECO "B11"]
[WhiteElo "2222"]
[BlackElo "2170"]
[PlyCount "98"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,98,13,4,10,0,18,11,9,-4,27,6,16,-6,1,-10,0,-16,-22,-21,-12,-81,-71,-103,-95,-80,0,0,0,0,0,0,0,0,10,-4,0,-4,-6,-31,-28,-30,-20,-20,-18,-19,-29,-40,-9,-9,-11,-11,-13,-16,-17,-104,-110,-151,-155,-150,-150,-159,-163,-281,-187,-746,-787,-987,-635,-1271,-1174,-1136,-1133,-1008,-1197,-1252,-1281,-1242,-1257,-1133,-969,-1093,-958,-29985,-29982,-29982,-29983,-29980,-29977]} 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3 5. Qxf3 e6 6. d3 Nd7 7. g3 Bc5 {B11: Caro-Kann: Two Knights Variation.} 8. Bg2 Ne7 9. Qe2 O-O {The position is equal.} 10. h4 $146 (10. O-O d4 11. Nb1 Bd6 12. Nd2 b5 13. Nf3 e5 14. h4 f6 15. Bh3 f5 16. Ng5 {1-0 Mijatovic,D (2097)-Cuzovic,O (1910) SRB-ch U18 Novi Sad 2021 (8)}) 10... f5 11. exd5 exd5 12. h5 {Repels Ng6} d4 13. Nb1 Nd5 14. Bxd5+ cxd5 15. Qe6+ Rf7 16. O-O (16. Qxd5 $11 Qe7+ 17. Kf1) 16... Nf8 $17 17. Qe5 Qd7 {[%cal Of5f4]} 18. c4 {[#]} Re8 ({Better is} 18... dxc3 $1 $17 19. Nxc3 Re8 20. Qxd5 b6) 19. Qxd5 $11 Qxd5 20. cxd5 Rd7 21. Nd2 Rxd5 {[%cal Of5f4]} 22. Nf3 $1 Nd7 23. Kg2 Bd6 24. h6 Nc5 25. Re1 {Prevents f4.} (25. hxg7 $5 f4 (25... Kxg7 26. Rd1 $11) (25... Nxd3 26. Rd1 $11) 26. gxf4 $11 (26. Bxf4 Bxf4 27. gxf4 Nxd3 $17)) 25... Rxe1 26. Nxe1 g6 27. Bd2 Kf7 28. Rc1 Be7 29. Nf3 Bf6 (29... Nxd3 30. Rc7 Ke6 31. Rxb7 $16) 30. Bg5 Ne6 31. Bxf6 Kxf6 {[%mdl 4096] Endgame KRN-KRN} 32. Rc8 g5 33. Rg8 (33. Ra8 $11 {remains equal.}) 33... g4 $17 {Black keeps a firm grip on the game.} 34. Nh4 Rd8 35. Rxd8 Nxd8 {KN-KN} 36. Kf1 Nf7 {[%cal Of7e5]} 37. Ke2 (37. f4 $142) 37... Nxh6 {[%cal Of5f4]} 38. Kd2 $2 {[#]} (38. Kf1) 38... f4 $1 $19 {[%mdl 512]} 39. gxf4 (39. Ng2 fxg3) 39... Nf5 40. Ng2 h5 41. Ke2 h4 {White must now prevent ...h3.} 42. Kf1 h3 {[%cal Oh3h2] ( -> ...h2!)} 43. Ne1 Nh4 {( -> ...h2)} 44. Kg1 Kf5 45. Nc2 Nf3+ 46. Kh1 Kxf4 47. Nb4 Ne5 {Black mates.} 48. Kg1 Kf3 49. Nc2 h2+ {Weighted Error Value: White=0.51/Black=0.08 (flawless)   Mistake:       	White=4     	Black=1      Inaccurate:     	White=2     	Black=3      OK:         	White=9     	Black=11     Best:        	White=3     	Black=3      Strong:       	White=1     	---        Brilliant:      	---       	Black=1} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Tsuboi, Edson Kenji"]
[Black "Santos, Marcus Vinicius More"]
[Result "1/2-1/2"]
[Annotator "TA"]
[WhiteElo "2187"]
[BlackElo "2310"]
[PlyCount "19"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,19,12,24,21,31,3,14,2,6,6,16,-15]} 1. e4 e6 2. d4 d5 3. Nd2 h6 4. Ngf3 Nf6 5. Bd3 c5 6. c3 {C03: French Tarrasch: Unusual Black 3rd moves.} cxd4 {is the legacy move (6...Nc6).} 7. cxd4 dxe4 {The position is equal.} 8. Nxe4 Nxe4 9. Bxe4 Bb4+ 10. Nd2 $146 {An uneventful encounter.   Inaccurate:     	White=2     	---        OK:         	---       	Black=1} (10. Bd2 Bxd2+ 11. Qxd2 Nd7 12. Qb4 Qe7 13. Qxe7+ Kxe7 14. Rc1 Nf6 15. Bxb7 Rb8 16. Bxc8 Rhxc8 17. Rxc8 Rxc8 {½-½ Kovacevic,A (2571)-Sedlak,N (2577) SRB-ch Vrnjacka Banja 2013 (5)}) 1/2-1/2

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Saito, Vinicius"]
[Black "Ramalho, Lucas Pereira"]
[Result "1/2-1/2"]
[Annotator "TA"]
[ECO "B30"]
[WhiteElo "2091"]
[BlackElo "1758"]
[PlyCount "72"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 14,72,-10,-35,-45,-52,-30,-41,29,14,44,31,28,31,30,30,35,12,26,20,25,0,6,0,6,24,17,7,17,-14,13,0,25,20,29,33,44,8,103,12,22,0,24,12,72,-14,37,43,48,41,76,42,66,0,0,0,0,-49,0,0,-7]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. Bxc6 bxc6 5. O-O Ne7 6. b3 Ng6 7. Bb2 f6 8. d4 cxd4 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} 9. Nxd4 e5 $1 10. Nf5 d6 $146 (10... d5 $15) (10... d5 11. Ng3 Be6 12. Nd2 Qd7 13. c4 d4 14. Nf3 c5 15. Ne1 Bd6 16. Nd3 O-O {0-1 Diaz Mino,D (2100)-Cuenca Jimenez,J (2558) Alicante Easter op 6th 2022 (2)}) 11. Qh5 $11 Qc7 12. Rd1 Be6 13. c4 $1 Rd8 14. Nc3 Bf7 $1 15. Qg4 h5 16. Qf3 Nf4 17. g3 Nh3+ 18. Kg2 Ng5 19. Qd3 g6 20. Nh4 Qd7 21. f3 Be7 22. Bc1 Kf8 23. Be3 Kg7 24. Rd2 {Active counter play!} Be6 25. Rad1 Qb7 (25... Nf7 $11) 26. Kh1 ({White should play} 26. f4 $16 Bh3+ 27. Kh1) 26... Nf7 27. f4 {[%cal Bf3f4,Bf4f5][%mdl 32]} Bg4 28. Rf1 Bh3 (28... Rhe8 $11 {keeps the balance.}) 29. Rff2 (29. Rc1 $16) 29... Nh6 ({Black should play} 29... Rhe8 $1 $11) 30. f5 $14 g5 31. Ng6 {Strong Square White (g6) Inhibits Ng4.} Rhe8 {[%cal Od6d5]} 32. Nxe7 (32. g4 {is interesting.} Nxg4 33. Rf3 d5 34. cxd5 Bb4 35. d6) 32... Rxe7 {[#]} 33. Bxg5 {[%csl Oa7,Oh5] Black has weak pawns} Ng4 $11 34. Be3 Nxf2+ 35. Rxf2 (35. Bxf2 $11 {should be considered.} Red7 36. Be1) 35... Kf7 (35... Kh8 $15 36. Rd2 Rdd7) 36. Rd2 Red7 {Weighted Error Value: White=0.22 (precise) /Black=0.22 (precise)   Mistake:       	White=4     	Black=5      Inaccurate:     	White=3     	Black=3      OK:         	White=6     	Black=8      Best:        	White=2     	Black=2      Strong:       	White=1     	Black=2} 1/2-1/2

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Poeta, Caio Medeiros"]
[Black "Lavigne Lopez, Raul Leonardo"]
[Result "1-0"]
[Annotator "NA RC"]
[ECO "E01"]
[WhiteElo "2088"]
[BlackElo "2138"]
[PlyCount "74"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 e6 2. c4 d5 3. Nf3 Nf6 4. g3 h6 5. Bg2 Bd6 6. O-O O-O 7. Nc3 Nc6 8. e3 dxc4 9. Qa4 e5 10. dxe5 Nxe5 11. Nxe5 Bxe5 12. Qxc4 c6 13. e4 Be6 14. Qb4 Qc7 15. Be3 Ng4 16. Bd4 Bxd4 17. Qxd4 Rfd8 18. Qb4 a5 19. Qa3 Rd2 20. Rad1 Rc2 21. Rc1 Rxc1 22. Rxc1 Qb6 23. Rc2 Qb4 24. Rd2 Qxa3 25. bxa3 Kf8 26. a4 Ke7 27. Rb2 Rb8 28. h3 Ne5 29. f4 Nc4 30. Rb1 f6 31. g4 Kd6 32. Kf2 Kc7 33. Rd1 Rd8 34. Rxd8 Kxd8 35. Bf1 Kc7 36. Bxc4 Bxc4 37. Ke3 Kb8 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Grillo, Carlos Henrique Gome"]
[Black "Santiago, Yago De Moura"]
[Result "0-1"]
[Annotator "TA"]
[ECO "A13"]
[WhiteElo "1982"]
[BlackElo "2451"]
[PlyCount "66"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,66,0,0,0,0,0,0,-4,8,0,17,-31,-25,-26,-12,-23,-4,-17,0,-43,-33,-108,-93,-97,-109,-133,-127,-163,-183,-181,-176,-239,-242,-250,-241,-242,-44,-243,14,-395,-383,-381,-396,-401,-394,-460,-458,-515,-508,-600,-585,-707,-690,-1751,-1697,-29986,-29987,-29998,-29999]} 1. c4 e6 2. g3 f5 3. f4 Nf6 4. Bg2 d5 5. cxd5 $146 (5. b3 Bd6 6. d3 c6 7. Bb2 O-O 8. Nd2 dxc4 9. bxc4 Ng4 10. Bd4 Bxf4 11. gxf4 Qxd4 {0-1 Hickl,N (1080)-Suarez,I (2208) RF-2017-0-00385}) 5... exd5 6. Nf3 {A13: English Opening: 1...e6.} Bd6 7. e3 O-O 8. O-O {The position is equal.} c6 9. b3 a5 10. a4 (10. Bb2 $11) 10... Na6 $15 {[%cal Bb8a6,Ba6b4,Bb4d3][%mdl 32]} 11. Nc3 Qe7 12. Re1 Ne4 13. Bb2 Nb4 14. d4 b6 (14... Rf6 {looks sharper.} 15. Ne5 Rh6 16. Na2 g5) 15. Nxe4 (15. Ne5 $15) 15... fxe4 16. Ne5 {[#] Dodges Bg4} Bxe5 $1 17. dxe5 {[#]} Nd3 $1 $36 {[%mdl 2048] Black has strong initiative. Black is more active.} 18. Re2 Bg4 {[%cal Od3b2] White must now prevent ...Nxb2!.} 19. Ba3 c5 {[%cal Ob6b5]} 20. Qd2 (20. Bf1 $142) 20... Bxe2 21. Qxe2 {[#]} b5 $1 22. axb5 Rab8 $2 (22... a4 $19 23. bxa4 Rxa4) 23. Qc2 (23. Rd1 $1 $15) 23... Rxb5 $2 (23... Qb7 $19 24. Bh3 Kh8 (24... Qxb5 25. Be6+ Kh8 26. Bxd5 $14) 25. Bxc5 Qc7) 24. Bf1 $2 {[%mdl 8192]} (24. Bxe4 $1 $11 dxe4 25. Qc4+ Qf7 26. Qxb5) 24... Qb7 $19 25. Bxd3 exd3 26. Qxd3 Rxb3 27. Qc2 Rc8 ({Not} 27... Rxe3 28. Qxc5 (28. Bxc5 $2 {is the wrong capture.} Rc8 $19) 28... Rxa3 29. Qxa3 $11) 28. Qf5 h6 {[%cal Od5d4]} 29. e6 Rxe3 30. Rb1 Qe7 31. Bxc5 Qxc5 32. Qf7+ Kh8 33. Rb7 Re2+ {Weighted Error Value: White=0.98/Black=0.32  Loses game:     	White=2     	---        Missed win:     	---       	Black=2      Mistake:       	White=3     	---        Inaccurate:     	White=2     	---        OK:         	White=4     	Black=8      Best:        	---       	Black=2      Strong:       	---       	Black=2} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Mariot Vaz, Joao Antonio Bertolu"]
[Black "Silva, Caio Henrique Angeli"]
[Result "0-1"]
[Annotator "TA"]
[ECO "C60"]
[WhiteElo "1982"]
[BlackElo "2197"]
[PlyCount "62"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,61,30,27,16,30,27,27,33,31,0,23,5,6,8,28,-39,-35,-32,0,-20,0,-42,-23,-23,0,-20,1,0,33,34,26,26,30,0,58,-25,-28,-59,-56,-62,-56,-89,-87,-81,-49,-105,-41,-302,-92,-1361,-54,-29998,-1451,-29999]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 {[%cal Bf1b5,Bb5a4,Ba4b3][%mdl 32]} a6 4. Ba4 Nge7 5. O-O Ng6 6. c3 d5 7. exd5 Qxd5 8. Bb3 {White has an edge.} Qd3 9. Re1 Be7 {Inhibits Ng5.} 10. Bc2 Qd6 11. d4 exd4 12. cxd4 (12. Nxd4 $11 Nxd4 13. cxd4) 12... Bg4 $15 13. Be3 O-O 14. Nbd2 (14. Be4 $5) 14... Rad8 15. Qe2 Nb4 16. Bb3 Nh4 17. h3 Nxf3+ 18. Nxf3 Bh5 19. g4 {[%cal Oe3d2] Hoping for Bd2!} Bg6 20. Ne5 {Repels Nd3} Bf6 21. Bf4 {Threatens to win with Nxg6.} Qb6 (21... Qxd4 $11 22. Nxg6 hxg6 23. Bxc7 Rd7) 22. Nxg6 (22. Rad1 $14) 22... hxg6 $11 23. Be5 Nc6 24. Bxf6 gxf6 25. Qe4 Kg7 (25... Qxd4 $2 26. Qxg6+ Kh8 27. Qh6+ (27. Bxf7 Qf4 $16) 27... Kg8 28. Rad1 $18) 26. d5 Ne5 (26... Nd4 {simplifies} 27. Rac1 Nxb3 28. axb3 Qxb3 29. Re3 Qxb2 30. Rxc7 b5) 27. Kg2 {[#]} (27. Qe3 $15) 27... Rh8 {Black is more active.} (27... g5 $1 $17 {aiming for ...Ng6.} 28. Qe3 Qd6) 28. Rac1 $2 {[%mdl 8192] [#]} (28. Qe3 $15) 28... g5 $2 (28... Rxh3 $1 $19 {[%cal Oh3h2] ( -> ...Rh2+!)} 29. Rh1 (29. Kxh3 Qxf2) 29... Nd3 30. Rxh3 Qxf2+ (30... Nxc1 $2 31. Qf4 $18) 31. Kh1 Nxc1) 29. Qc4 $2 {[%mdl 8192]} Ng6 $2 (29... Nxc4 $19 30. Rc3 Ne5 (30... Nxb2 $2 31. Re7 $19)) 30. Kh2 {[%mdl 8192]} (30. Qxc7 $2 {perishes.} Nf4+ $19) (30. d6 $15 Nf4+ 31. Kg1 (31. Kf1 Rdf8 $17) 31... Nxh3+ 32. Kh1) 30... Nf4 (30... Qxf2+ $142 31. Kh1 Rxh3#) 31. Rg1 Rxh3# {Weighted Error Value: White=0.88/Black=0.60.  Loses game:     	White=3     	---        Missed win:     	---       	Black=2      Mistake:       	White=3     	Black=2      Inaccurate:     	White=6     	Black=3      OK:         	White=7     	Black=6      Best:        	White=1     	Black=1} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Desideri, Ricardo Maruchi"]
[Black "Aranha Filho, Alvaro Z."]
[Result "1-0"]
[Annotator "TA"]
[ECO "A09"]
[WhiteElo "1977"]
[BlackElo "2178"]
[PlyCount "70"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,69,27,81,82,96,99,104,102,125,132,134,62,44,12,123,-23,143,141,130,123,127,142,120,112,126,117,188,156,268,147,160,54,175,-22,-18,-20,-10,-129,-75,-102,-109,-93,-106,-107,416,52,396,0,479,477,430,0,766,723,1133,1119,29975,29978,5285,5277,29983,-29999]} 1. Nf3 d5 2. c4 d4 3. b4 f6 4. e3 dxe3 5. fxe3 Bg4 (5... e5 $11) 6. Be2 {A09: Réti Opening: 1 Nf3 d5 2 c4.} Nh6 7. d4 e5 8. O-O {White is better.} (8. dxe5 $6 Qxd1+ (8... Bxb4+ 9. Bd2 $11) 9. Kxd1 Bxb4 $11) 8... Nd7 9. c5 Be7 10. d5 $146 (10. Nc3 $16) (10. Bb2 O-O 11. Nbd2 exd4 12. exd4 c6 13. Bd3 f5 14. Qb3+ Kh8 15. Nc4 Nf6 16. Rae1 {1-0 Reinfeld,F-Leary,J Ventnor City 1939 (5)}) 10... f5 $14 11. e4 f4 (11... a5 $11 {keeps the balance.}) 12. Qb3 (12. Bb2 $16) 12... Bf6 $2 (12... a5 $11) 13. Nc3 $36 {[%mdl 2048] Keeping Black busy.} Nf7 {[#]} 14. Ng5 $1 {[%mdl 512]} Bxg5 15. Bxg4 O-O {Black is weak on the light squares} 16. Be6 Kh8 17. Bb2 {[%cal Od5d6]} Nh6 (17... a5 $16 {was worth a try.}) 18. Rad1 f3 (18... Nf6 $16 19. Nb5 a6) 19. Nb5 (19. Rxf3 $6 Rxf3 20. gxf3 Be3+ 21. Kh1 Qh4 $18) (19. gxf3 $18 {Hoping for c6.} a5 20. a3) 19... fxg2 20. Kxg2 ({White should play} 20. Rxf8+ $16 Nxf8 21. Bxe5 Nxe6 22. dxe6 Be3+ 23. Kxg2 Qg5+ 24. Bg3) 20... a6 {[#]} (20... Rxf1 $14 21. Rxf1 a6) 21. c6 $2 (21. d6 $1 $18 {[%cal Rd6c7]} cxd6 22. Nxd6) 21... Rxf1 (21... bxc6 {keeps more tension.} 22. Na7 Bf4 23. Kh1 cxd5 24. Nc6 Qh4) 22. Rxf1 bxc6 23. dxc6 (23. Na7 $11 Rxa7 24. Bxd7) 23... Nf8 (23... Nf6 $142 24. Nc3 Qd2+ 25. Rf2 Qd6) 24. Rxf8+ $17 Qxf8 25. Nxc7 Rd8 26. Nd5 {[#]} (26. Nxa6 $2 Rd2+ 27. Kh3 Qf1+ 28. Kg3 Qg2#) 26... Re8 $2 {[%mdl 8192]} (26... Rd6 $1 $17 {[%cal Rd6c6] and life is bright.} 27. Qf3 (27. Bd7 $2 Rg6 $19) 27... Qxf3+ 28. Kxf3 Rxc6 (28... Rxe6 29. c7 $11)) 27. Bh3 $2 {This pair of bishops is nice.} (27. Bd7 $18) 27... Bh4 $2 {[%mdl 8192]} (27... Qd6 $1 $14 28. Qc2 Bd8) 28. Qe3 $2 {Active counter play!} (28. Qf3 $18 Qd6 29. c7) 28... Nf7 $2 {[%mdl 8192]} (28... Qd6 $11 29. Bd7 (29. c7 Qg6+ 30. Kf3 Qh5+ 31. Kg2 Qg6+ 32. Kf3 Qh5+ 33. Kg2 Qg6+ $11) 29... Qg6+ 30. Kh3 Qh5) 29. c7 $18 Nd6 30. Qc5 $2 (30. Bd7 $18) 30... h6 $2 {[%mdl 8192] [#]} (30... Qf7 $11 31. Bf5 (31. Qxd6 {is a self mate.} Qf2+ 32. Kh1 Qf3+ 33. Kg1 Bf2+ 34. Kf1 Bg3+ 35. Kg1 Qf2+ 36. Kh1 Qxh2#) (31. c8=B $2 Nxe4 32. Qc4 Nd2 $19) (31. c8=Q Rxc8 32. Bxc8 Nxe4 $17) 31... Qh5 32. Qxd6 Qe2+ 33. Kh3 Be1 34. Bxe5 (34. c8=R $2 Qf3#) 34... Qh5+ 35. Kg2 Qe2+ 36. Kh3) 31. Bxe5 $1 {[%mdl 512]} Rxe5 (31... Nc8 32. Qxf8+) 32. c8=Q (32. c8=B $2 {too greedy.} Rg5+ (32... Rxe4 $2 33. Bcg4 $19) 33. Bhg4 h5 $19 (33... Qxc8 $2 34. Qxc8+ Nxc8 35. Kh3 $19)) 32... Rg5+ 33. Kh1 Qxc8 34. Bxc8 Nxe4 35. Qc6 $4 {[%mdl 8192]} (35. Qf8+ Kh7 36. Bf5+ Rxf5 37. Qxf5+ Kh8 38. Qxe4 Bg5 39. Qe8+ Kh7 40. h4 (40. Qe4+ Kh8 $18)) 35... Nf2# {[%mdl 32768] Weighted Error Value: White=1.28/Black=1.52 Loss on time!?  Loses game:     	---       	Black=4      Missed win:     	White=4     	---        Mistake:       	White=5     	Black=6      Inaccurate:     	White=1     	Black=1      OK:         	White=7     	Black=10     Best:        	White=3     	---} 1-0

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Bucci, Andrea Vidigal"]
[Black "Kayser, Gustavo Warmling"]
[Result "0-1"]
[Annotator "NA RC"]
[ECO "B33"]
[WhiteElo "1785"]
[BlackElo "2036"]
[PlyCount "68"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 O-O 12. Nc2 Bg5 13. a4 bxa4 14. Rxa4 a5 15. Bc4 Rb8 16. b3 Kh8 17. Nce3 g6 18. h4 Bxh4 19. g3 Bg5 20. f4 exf4 21. gxf4 Bh4+ 22. Kd2 Bf6 23. Nxf6 Qxf6 24. Nd5 Qg7 25. Qg1 Be6 26. Qg5 f5 27. Rh6 fxe4 28. Ne7 Nxe7 29. Bxe6 d5 30. Ra1 Nf5 31. Rh3 Rxb3 32. Rah1 e3+ 33. Ke2 Rb2+ 34. Kf3 Rf2+ 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Ricci, Lucas Estremes"]
[Black "Guimaraes, Diogo Duarte"]
[Result "0-1"]
[Annotator "TA"]
[ECO "A62"]
[WhiteElo "1772"]
[BlackElo "2299"]
[PlyCount "78"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,78,-28,-39,-29,-39,-40,-64,-40,-84,-75,-73,-73,-135,-123,-146,-150,-144,-161,-142,-145,-190,-212,-210,-210,-269,-272,-252,-266,-364,-273,-287,-21,-655,-637,-649,-640,-776,-775,-826,-820,-831,-812,-775,-791,-789,-764,-1088,-1084,-977,-964,-1212,-1184,-1582,-1525,-29977,-29978,-29984,-29984]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 c5 5. d5 O-O {[%cal Bh8f8,Bf8e8,Be8e4,Be4b4,Bb4b2][%mdl 32]} 6. Nc3 d6 7. Nf3 e6 8. O-O exd5 9. cxd5 Re8 10. Bf4 Na6 11. h3 Nc7 12. a4 Bf5 {A62: Modern Benoni: Fianchetto Variation without early ...Nbd7.} 13. g4 $146 (13. Nd2 Nh5 14. e4 Nxf4 15. gxf4 Bc8 16. Nc4 a6 17. Re1 b5 18. axb5 Bxc3 19. bxc3 axb5 20. Nb6 Rxa1 21. Qxa1 {½-½ Oren,I (2275)-Saxena,A (2232) Afroasian-ch12 sf-B email 2010}) 13... Be4 {[%cal Rf6d5]} 14. Nxe4 Rxe4 {Black is slightly better.} 15. e3 Rb4 (15... Ncxd5 16. Bh2 $16) 16. Ne1 Rxb2 {Black plays on the queen side and is better} 17. e4 {[#]} ({Better is} 17. Rc1) 17... Rb4 $1 $17 {Black is more active.} 18. Nc2 {[#]} Nfxd5 {[%mdl 512]} 19. Bd2 Nc3 20. Bxc3 Bxc3 21. Nxb4 Bxa1 ({Resist} 21... cxb4 22. Rc1 $17) (21... Bxb4 22. f4 $11) 22. Qxa1 cxb4 23. Rd1 a5 24. e5 d5 25. Qd4 Qd7 26. Bxd5 Qxa4 $2 (26... Ne6 $19 27. Bxe6 Qxd4 (27... Qxe6 $2 28. Qd5 $19) 28. Rxd4 fxe6) 27. Bxf7+ $2 {[%mdl 8192] This costs White the game.} Kxf7 $19 28. Qf4+ Kg8 29. Rd6 {Qc4+ would now be deadly.} Qa1+ 30. Kg2 Qc3 31. Qg5 Qc4 ({Weaker is} 31... Rf8 32. Rxg6+ Kh8 (32... hxg6 33. Qxg6+ Kh8 34. Qh6+ Kg8 35. Qg6+ Kh8 36. Qh6+ Kg8 37. Qg6+ $11) 33. Rg8+ Rxg8 34. Qf6+ Rg7 35. Qf8+ Rg8 36. Qf6+ Rg7 37. Qf8+ Rg8 38. Qf6+ $11) 32. Rd8+ Rxd8 33. Qxd8+ Kf7 34. Qf6+ Ke8 {Hoping for ...Qc6+.} 35. Qh8+ Ke7 36. Qg7+ Qf7 37. Qh8 b3 {( -> ...Ne8)} 38. Qb8 Qd5+ 39. f3 Ne6 {Weighted Error Value: White=0.72/Black=0.30  Loses game:     	White=1     	---        Missed win:     	---       	Black=1      Mistake:       	White=1     	---        Inaccurate:     	White=3     	---        OK:         	White=5     	Black=8      Best:        	---       	Black=1      Strong:       	---       	Black=1} 0-1

[Event "2nd Sampa STD Open 2025"]
[Site "Sao Paulo"]
[Date "2025.02.01"]
[Round "4"]
[White "Soares, Pedro Henrique Olive"]
[Black "Carvalho Jr, Celestino"]
[Result "0-1"]
[Annotator "NA RC"]
[ECO "A29"]
[WhiteElo "1696"]
[BlackElo "1930"]
[PlyCount "64"]
[EventDate "2025.02.01"]
[EventType "swiss"]
[EventCountry "BRA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 e5 2. Nc3 Nc6 3. g3 Nf6 4. Nf3 Bc5 5. Nxe5 Bxf2+ 6. Kxf2 Nxe5 7. d3 Nfg4+ 8. Kg1 c6 9. h3 Nf6 10. Bg2 O-O 11. Kh2 d6 12. b3 d5 13. cxd5 cxd5 14. Bb2 Re8 15. Rf1 a6 16. Rc1 Qd6 17. Rxf6 Qxf6 18. Nxd5 Qh6 19. Bxe5 Rxe5 20. d4 Rxd5 21. Rxc8+ Rxc8 22. Bxd5 Qe3 23. Qd3 Qf2+ 24. Bg2 Rc1 25. h4 Rg1 26. Qe4 h5 27. Qxb7 Qxd4 28. Qa8+ Kh7 29. Be4+ f5 30. Bd3 Qd8 31. Bc2 Qc7 32. Qxa6 Qxg3# 0-1

