[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.1"]
[White "Bartel, Mateusz"]
[Black "Teclaf, Pawel"]
[Result "1/2-1/2"]
[ECO "A10"]
[WhiteElo "2648"]
[BlackElo "2451"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,60,31,29,23,79,76,69,78,75,64,132,116,148,118,138,125,139,54,97,63,77,47,48,16,14,0,53,0,0,0,0,0,0,0,0,-5,-3,-3,-10,-18,-14,-26,0,-28,0,0,0,0,0,0,0,0,0]} 1. c4 b6 2. Nc3 Bb7 3. d4 e6 4. e4 Bb4 5. f3 Ne7 6. Nge2 {[#] A40: Unusual replies to 1 d4.} Nbc6 $146 (6... f5 $11) ({Predecessor:} 6... d5 7. a3 Bxc3+ 8. Nxc3 O-O 9. Bg5 dxe4 10. fxe4 f6 11. Bh4 Nbc6 12. d5 Ne5 13. Qd2 Ba6 {½-½ (62) Gelfand,B (2673)-Lomasov,S (2553) Moscow 2018}) 7. d5 $16 Ne5 8. a3 {White is slightly better.} Bxc3+ 9. Nxc3 O-O {[#]} (9... d6 $14) 10. f4 $1 {[%cal Rf4e5]} N5g6 {[#]} 11. h4 $1 f5 {White should prevent ...fxe4.} 12. h5 Nh8 13. g4 (13. h6 $16 {Hoping for hxg7.} gxh6 14. Rxh6) 13... fxe4 $14 14. Bg2 exd5 15. cxd5 Nf7 16. Be3 c6 17. dxc6 dxc6 (17... Bxc6 $11 18. Bh3 (18. Bxe4 d5 $17) 18... Qc7) 18. Bxe4 ({But not} 18. Nxe4 Qxd1+ 19. Rxd1 Nd5 $11) (18. Qb3 $1 $14) 18... Nd5 $11 19. Bxd5 cxd5 20. Qd4 Rc8 {Strongly threatening ...Rc4.} 21. O-O-O $1 Rc4 22. Qxc4 dxc4 23. Rxd8 Rxd8 24. Rg1 Rd3 25. Bd2 Bf3 26. Nb5 a6 27. Nc7 {The position is equal.} Nd6 {Threatens to win with ...Ne4.} 28. Nxa6 Ne4 29. Bb4 Nf6 30. Nc7 Rd7 {Accuracy: White = 69%, Black = 69%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.2"]
[White "Heberla, Bartlomiej"]
[Black "Nasuta, Grzegorz"]
[Result "1-0"]
[ECO "D47"]
[WhiteElo "2572"]
[BlackElo "2558"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,103,-18,-12,-18,-12,-14,-24,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,32,39,29,-55,-16,-9,31,32,112,131,114,127,231,222,229,213,550,544,518,509,527,512,979,964,12828,12829,11237,6676,12827,12830,12830,12831,12832,12829,11590,10732,5850,5185,12841,12841,12844,12845,12845,12845,12850,27993,27994,27992,27995,27990,27991,27991,27992,27992]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Be2 Bb7 9. e4 b4 10. e5 bxc3 11. exf6 Nxf6 {D47: Semi-Slav: Meran System.} 12. bxc3 Bd6 13. Rb1 {[#]} Qc8 $146 {Black has an edge.} ({Predecessor:} 13... Qc7 14. Qb3 Rb8 15. Ba3 O-O 16. Bxd6 Qxd6 17. O-O Nd5 18. Qc2 Nf4 19. Ng5 Nxe2+ 20. Qxe2 {1-0 (66) Murshed,N (2401)-Goganov,A (2561) Dhaka 2017}) 14. Bg5 Ne4 15. Qc2 c5 {Strongly threatening ...cxd4.} 16. Bb5+ Kf8 {aiming for ...cxd4.} 17. Be3 cxd4 18. Bxd4 Bc5 19. Be2 Bxd4 20. Nxd4 Nc5 21. f3 g6 22. Qc1 Kg7 23. Qe3 Rd8 24. h4 h5 25. g4 e5 26. Qxe5+ {[%mdl 64] Double Attack} Kg8 {White must now prevent ...Re8.} 27. Kf1 (27. O-O $11) 27... hxg4 $1 $15 28. h5 $132 {[%mdl 2048] Intending hxg6 and mate. White is not keeping still} Rd5 29. Qe3 {Threatens to win with hxg6.} Qe8 {White leaves nothing to chance now.} (29... g5 $1 $14) 30. Qxe8+ $16 Rxe8 31. hxg6 Rg5 (31... Rde5 $16) 32. gxf7+ $18 {[%mdl 64] Overworked Piece} Kxf7 33. Rh7+ Rg7 $2 (33... Kg6 {is tougher.} 34. Rhxb7 (34. Rbxb7 Nxb7 35. Rxb7 gxf3 $18) 34... Nxb7) 34. Bc4+ Kf6 {[#]} 35. Rxg7 $1 Kxg7 36. Rb5 Rc8 {[#]} (36... Bxf3 $142 37. Rxc5 Be4 38. Rg5+ Kf6) 37. Rxc5 $1 {[%mdl 576] Remove Defender, Decoy} Rxc5 {[%mdl 4096] Endgame KRB-KBN} 38. Ne6+ {[%mdl 64] Double Attack} Kf6 39. Nxc5 Bxf3 40. Be2 Bd5 41. c4 {[%cal Bc3c4,Bc4c5][%mdl 32]} Bf7 42. Kf2 Ke5 43. Kg3 Kd4 44. Nb3+ Kc3 45. c5 Bd5 46. Bxg4 Kb4 47. Bd7 Bxb3 48. axb3 Kxc5 {White mates.} 49. Kf4 Kd4 50. Ba4 a5 51. Kf5 Kd5 52. Kf6 {Accuracy: White = 94%, Black = 65%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Tomczak, Jacek"]
[Black "Gumularz, Szymon"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2563"]
[BlackElo "2277"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,75,19,31,14,45,35,48,54,41,34,37,39,62,34,32,24,36,29,35,27,34,27,29,25,19,21,16,-47,-51,-51,-54,-51,-51,-65,0,0,0,0,0,-79,-17,-21,-10,-10,-10,-27,0,0,0,-9,-10,-13,-13,-13,-10,-9,-17,-14,0,0,0,0,1542,1412,12839,12837,12848,12848]} 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Bg5 a6 5. f4 b5 6. Nf3 {B06: Modern Defence.} Nf6 7. Bd3 Bb7 8. e5 {White is slightly better.} Nd5 9. Nxd5 Bxd5 10. Qe2 {[#]} Nd7 $146 ({Predecessor:} 10... Nc6 11. c3 O-O 12. Bh4 Qd7 13. O-O Qg4 14. Bg3 Bh6 15. Qe3 f6 16. Be2 Qe6 {0-1 (70) Predke,A (2533)-Dubov,D (2659) Sochi 2015}) 11. O-O dxe5 $1 12. dxe5 O-O 13. c4 Bxf3 14. Rxf3 Nc5 $1 {[%cal Bd7c5,Bc5e6,Be6d4][%mdl 32]} 15. Bh4 Ne6 {next ...Nd4 is good for Black.} 16. Qe4 Qd4+ 17. Qxd4 Nxd4 18. Re3 (18. Rh3 $11) 18... bxc4 $15 19. Be4 Rab8 20. Bxe7 Rfe8 $1 {[%cal Re8e7]} 21. Ba3 Bf8 ({Black should play} 21... Bh6 $1 $15 22. g3 Rxe5 {[%mdl 64] Pin}) 22. Bxf8 Kxf8 23. Rb1 f6 24. Rc1 ({Much weaker is} 24. exf6 c3 $1 $17 {[%mdl 512]}) (24. Bf3 $11 {remains equal.}) 24... Rxb2 (24... fxe5 $17 25. Bf3 exf4 26. Rxe8+ Kxe8 27. Rxc4 Nxf3+ 28. gxf3 Rxb2 29. Rxc7 Rxa2 30. Rxh7 Kf8) 25. Rxc4 $11 Ne2+ 26. Kf1 $1 Nxf4 27. exf6 Nxg2 28. Rh3 Rd8 {[%cal Rd8d1]} 29. Rc1 Rdd2 30. Rxh7 Nf4 31. Re1 Rxh2 32. Rxh2 Rxh2 {[%mdl 4096] Endgame KRB-KRN} 33. Rc1 Ne2 34. Rxc7 Nf4 35. Bc2 {Threatens to win with Bb3.} Nh3 $2 {[%mdl 8192] [#]} (35... Ne6 $11 36. Rc8+ Kf7) 36. Rc6 $1 $18 {White is clearly winning.} Rf2+ 37. Ke1 Rf4 38. Bxg6 {Accuracy: White = 88%, Black = 71%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Pakleza, Zbigniew"]
[Black "Piorun, Kacper"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2555"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,90,5,7,13,0,14,-14,24,0,10,0,0,-71,-47,-68,-21,-33,-8,0,0,0,22,0,14,0,37,34,40,0,122,114,122,129,114,104,104,104,104,104,106,105,110,106,111,93,95,94,114,109,117,79,85,96,122,112,100,98,170,125,126,55,354,366,478,478,478,478,496,481,660,534,623,609,654,660,2346]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. a3 Bxc3+ 7. bxc3 c6 8. Bd3 b6 9. O-O Ba6 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} 10. Qe2 Nbd7 11. Bb2 Qc7 {[#] The position is equal.} 12. Rfd1 $146 ({Predecessor:} 12. Rfc1 Rac8 13. a4 Rfe8 14. h3 e5 15. dxe5 Nxe5 16. Nxe5 Qxe5 17. Rd1 Rcd8 18. cxd5 Bxd3 19. Rxd3 cxd5 {1-0 (44) Logothetis,S (2225)-Kapagiannidis,K Ikaros 2000}) 12... Rac8 13. Nd2 e5 14. Rac1 (14. cxd5 $11 {keeps the balance.} Bxd3 15. Qxd3) 14... e4 $17 15. Bb1 Rfe8 16. Ba2 Nf8 17. h3 Ng6 18. Qe1 b5 19. cxd5 cxd5 20. a4 Qd6 21. axb5 Bxb5 22. Bb3 Qd7 (22... Qe6 $11) 23. c4 $16 Ba4 {[#]} 24. Bxa4 $1 Qxa4 25. Ra1 Qd7 26. Rdc1 dxc4 27. Nxc4 Qe6 28. Qe2 Rc7 29. Ba3 Rd8 30. Na5 Rxc1+ 31. Rxc1 Rd5 32. Rc6 Qd7 33. Qc4 {Hoping for Rc8+.} h6 ({But not} 33... Rxa5 $2 34. Rc8+ Ne8 {[#]} 35. Qc7 $1 $18 {[%mdl 512]}) 34. Rc7 Qe6 35. Nc6 a5 36. Be7 {aiming for Nd8.} Ne8 (36... Rg5 $16 37. Qxe6 fxe6) 37. Ra7 {Black must now prevent Ra8.} Kh7 38. Nd8 (38. Rb7 $16) 38... Qb6 $2 {[%mdl 8192] A mistake that costs the game.} (38... Qf5 $14) 39. Rb7 $18 ({Less strong is} 39. Qxd5 Qb1+ 40. Kh2 Qb8+ 41. g3 Qxa7 $16) 39... Qxb7 40. Nxb7 {White is clearly winning.} Nxe7 41. Nc5 f5 42. Qa6 Rd6 43. Qxa5 Nd5 44. Qa7 Nef6 45. Qf7 Kh8 {Accuracy: White = 82%, Black = 53%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Janik, Igor"]
[Black "Gajewski, Grzegorz"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2531"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,59,17,25,0,0,0,0,0,0,0,0,0,0,7,20,20,73,55,131,127,108,112,104,112,132,97,99,99,87,79,99,101,230,181,210,170,235,235,269,246,231,233,1321,1143,12836,12837]} 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 a6 8. a4 $1 {8.a4 is better than 8.Qxc4.} Bd7 9. Rd1 {E05: Open Catalan: 5 Nf3 Be7.} Bc6 10. Bg5 b5 11. Bxf6 {The position is equal.} Bxf6 12. Nc3 Qe8 13. d5 exd5 14. Nd4 $1 {[#]} Bxd4 $146 ({Predecessor:} 14... Qe5 15. e4 dxe4 16. Nxe4 Bxe4 17. Bxe4 Ra7 18. axb5 Qc5 19. Nc6 Nxc6 20. Bxc6 axb5 21. Rxa7 Qxa7 22. Bxb5 {½-½ (34) Dubov,D (2699)-Wei,Y (2732) chess24.com INT 2020}) 15. Rxd4 Nd7 (15... h6 $11) 16. Nxd5 $16 Qe5 {[#]} (16... Rb8 $1 $14) 17. Ne7+ $1 {[%mdl 576] Discovered Attack} Qxe7 18. Bxc6 Rad8 {next ...Qc5 is good for Black.} 19. axb5 $40 {[%mdl 128] Black is in trouble.} Ne5 20. Rxd8 Rxd8 21. Rxa6 g6 22. Kg2 Qc5 23. Qc3 Rb8 {[#] A mistake that costs the game.} (23... h5 $16 {was called for.}) 24. b4 $1 $18 {[%cal Rb4c5]} Qe7 25. Be4 Re8 (25... Rd8 $142 26. h3 h6) 26. Bd5 h5 27. f4 c6 28. bxc6 ({Don't take} 28. Qxe5 $6 cxd5 29. Qxe7 Rxe7 $16) 28... Nxc6 $2 (28... Nd3 29. Bxf7+ (29. exd3 Qe2+ {[%mdl 64] Double Attack} 30. Kg1 Qd1+ 31. Kg2 Qe2+ 32. Kg1 Qd1+ 33. Kg2 Qe2+ $11) 29... Kh7) 29. e4 Qxb4 {[#]} 30. Qf6 $1 {[%mdl 576] Double Attack. Accuracy: White = 90%, Black = 49%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Krasenkow, Michal"]
[Black "Krzyzanowski, Marcin"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2521"]
[BlackElo "2401"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,116,24,39,37,49,15,21,10,29,6,49,6,10,0,46,61,50,26,20,24,37,22,81,103,120,86,162,105,111,110,146,93,147,108,145,143,152,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,2,2,2,1,6,6,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,10]} 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 e6 5. Bd3 dxc4 6. Bxc4 Nbd7 7. O-O Bd6 {The main line 7...Bd6 scores better than 7...b5.} 8. b3 {D30: Queen's Gambit Declined: Systems without Nc3.} b5 9. Be2 Bb7 10. Bb2 {[#]} Qb8 $146 ({Predecessor:} 10... Qc7 11. Nbd2 Rc8 12. Rc1 Qb8 13. e4 e5 14. dxe5 Nxe5 15. Nd4 Ng6 16. Nf5 Bxh2+ {1-0 (36) Henriksson,J (2279)-Ask,J (2194) Norrkoeping 2012}) 11. Nbd2 O-O 12. Qc2 (12. e4 $5 {[%cal Re4e5]} e5 13. g3 $14) 12... Rc8 13. Ne4 c5 14. Nxd6 Qxd6 15. d5 exd5 16. Bxb5 d4 17. Qf5 {[%cal Re3d4]} Bxf3 (17... Rcb8 $11 {remains equal.} 18. Bxd7 (18. exd4 $2 Be4 $17) 18... Qxd7) 18. Qxf3 $16 Ne5 19. Qf4 {[%cal Re3d4]} Rab8 (19... Nd5 $16 20. Qg3 a6) 20. Be2 (20. exd4 $18 cxd4 21. a4) 20... Nd5 21. Qg3 Qf6 22. exd4 (22. Rfc1 $142) 22... Ng6 (22... Nc6 $142) 23. Rad1 Ndf4 24. Bc4 cxd4 25. Bxd4 $2 (25. Rfe1 $16) 25... Rxc4 $1 $11 {The position is equal.} 26. Bxf6 Ne2+ {[%mdl 64] [#] Double Attack} 27. Kh1 Nxg3+ 28. hxg3 Rc2 29. Bd4 Rxa2 30. Ra1 Rxa1 31. Rxa1 Rxb3 32. Rxa7 {[%mdl 4096] [#] Endgame aiming for Ra8+. KRB-KRN} h6 33. Ra8+ Kh7 34. Ra7 Rd3 35. Ba1 Rd8 36. Kh2 Kg8 37. g4 Nf4 38. Be5 Ne6 39. f3 Rd5 40. Bg3 Rd2 41. Ra8+ Kh7 42. Ra7 f6 43. Re7 Nd4 {And now ...Nxf3+ would win.} 44. Kh3 Rd1 45. Bf2 Nc6 46. Rc7 Ne5 47. Kg3 Nd7 48. Bc5 g5 49. Ba3 Kg6 50. Bb4 Rd3 51. Ra7 Ne5 {White must now prevent ...Nc6.} 52. Bf8 {[%csl Gf8][%cal Ra7g7]} Nd7 53. Bb4 h5 54. gxh5+ Kxh5 55. Ra6 Rb3 56. Be7 Kg6 57. Rd6 Rb7 58. Bd8 Kf7 {Accuracy: White = 83%, Black = 85%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Dziuba, Marcin"]
[Black "Olszewski, Michal"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2486"]
[BlackElo "2477"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,117,22,29,20,22,14,24,33,31,25,38,31,28,-25,-32,-29,-26,-25,-20,-21,-23,-33,-34,-28,-25,-25,-25,-16,-19,-25,-28,-32,-26,-20,-21,-27,-27,-37,-14,-23,-26,-56,-56,-53,-66,-60,-37,-80,0,0,0,0,0,0,0,0,9,-45,-50,-105,-100,-96,-117,-107,-111,-107,-65,-167,-164,-154,-134,-215,-215,-140,-16,-16,-16,-16,-16,-2458,-837,-4141,-4141,-4141,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,0,-16,-16,-16,0,-14]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nb6 7. Be3 O-O 8. Bb5 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} Be6 9. Nf3 Nc4 10. Bxc4 {White has an edge.} Bxc4 11. Qa4 Ba6 12. O-O-O {[#]} Qd7 $146 ({Predecessor:} 12... Nd7 13. h4 Nb6 14. Qb3 Nc4 15. h5 Nxe3 16. fxe3 c5 17. hxg6 hxg6 18. e5 cxd4 19. exd4 {½-½ (32) Tkachiev,V (2632)-Macieja,B (2615) Santo Domingo 2002}) 13. Ne5 (13. Qa3 $142) 13... Qxa4 $11 14. Nxa4 b6 15. Nc3 Bb7 16. h4 c5 17. h5 cxd4 18. Bxd4 f6 19. Ng4 Nc6 20. hxg6 hxg6 21. Nh6+ Bxh6+ 22. Rxh6 Rfd8 23. Be3 $1 Rxd1+ 24. Kxd1 Rd8+ 25. Kc2 Ne5 26. f3 g5 27. Rh1 g4 28. fxg4 Nxg4 29. Bf4 Rd4 30. Re1 f5 (30... e5 $17 31. Bd2 Bc6) 31. Bb8 fxe4 32. Bxa7 Rd6 33. Bb8 ({Don't blunder} 33. Nxe4 $2 Re6 $19) 33... Rf6 34. a4 ({Don't go for} 34. Nxe4 $2 Re6 $19) 34... Rf2+ 35. Re2 (35. Kb3 $11) 35... e3 $15 {Strongly threatening ...Ba6.} 36. Bg3 (36. Kb3 $1 $15) 36... Ba6 $17 37. Bxf2 exf2 38. Rxf2 Nxf2 39. Nd5 Kf7 40. b4 (40. Nxb6 $15 Ke6 41. b4) 40... Bb7 41. Nxb6 Bxg2 42. Kc3 (42. Nc4 $17 {keeps fighting.}) 42... e5 $1 $19 43. b5 {[#]} Ne4+ (43... Bf1 $1 $17 {With the idea ...Ke6.} 44. Nd5 Ne4+ 45. Kb3 Ke6) 44. Kb4 $1 $11 Nd6 {And now ...Ke6 would win.} 45. a5 Bf1 46. Nd7 $2 {[%mdl 8192]} (46. a6 $11) 46... e4 $19 47. b6 e3 48. Kc3 {[#]} Nb7 $2 (48... Nc4 $1 $19 49. Nc5 Ne5) 49. Ne5+ $11 {[#]The position is equal.} Ke6 $1 50. Ng4 e2 51. Kd2 Nc5 {( -> ...Nd3!)} 52. Ne3 Nd3 53. Nc2 {aiming for b7.} Kd7 54. a6 Kc8 55. Ne1 Nc5 56. Nc2 {[#]} Nd3 $1 {[%mdl 512]} 57. Ne1 (57. Kxd3 e1=Q+) 57... Nb4 58. Nf3 Nd3 59. Ne1 {Accuracy: White = 67%, Black = 87%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Nasuta, Grzegorz"]
[Black "Heberla, Bartlomiej"]
[Result "1/2-1/2"]
[ECO "B10"]
[WhiteElo "2377"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,83,28,29,34,22,26,33,31,20,30,15,18,12,29,32,29,22,22,12,11,6,4,11,13,5,4,0,0,0,0,0,0,0,0,-26,0,-30,-14,-24,-21,-73,-78,-85,-62,-106,-30,-32,-39,-44,-48,-104,-103,-104,-94,-94,-24,-67,-67,-76,0,0,0,0,0,0,0,0,0,-18,-12,-52,-37,-58,-58,-58]} 1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nf6 5. Qe2 Nxe4 6. Qxe4 Be6 {B11: Caro-Kann: Two Knights Variation.} 7. Be2 Nd7 8. d4 {[#]} Nf6 $146 {White is slightly better.} ({Predecessor:} 8... Bd5 9. Qe3 Bxf3 10. Bxf3 e6 11. O-O Bd6 12. d5 cxd5 13. Bxd5 O-O 14. Bxb7 Rb8 {1-0 (29) Munoz Pantoja,M (2512)-Garcia Gil,J (2122) Cornella de Llobregat 2019}) 9. Qd3 Bg4 10. O-O e6 11. h3 Bh5 12. c4 Be7 13. Be3 O-O 14. Rac1 Qc7 15. Ne5 Bxe2 16. Qxe2 Rfd8 17. Nd3 a5 18. Rfd1 a4 19. Qf3 Rac8 20. g4 b6 {[%cal Bb7b6,Bb6b5][%mdl 32]} 21. Kg2 c5 22. g5 Nd7 23. d5 exd5 24. cxd5 Bd6 25. Rc4 {[#]} (25. Bf4 $11 {remains equal.}) 25... b5 $1 $17 {[%cal Rb5c4]} 26. Rh4 Nf8 27. Nf4 Ng6 (27... Qd7 $17) 28. Nxg6 $11 hxg6 29. Re4 Re8 30. h4 ({White should play} 30. a3 $15) 30... Rxe4 $17 31. Qxe4 Qd7 32. Qf3 {[#]} Re8 (32... a3 $1 $17 {[%mdl 512]} 33. bxa3 Ra8) 33. h5 gxh5 34. Qxh5 Re4 (34... g6 $17 35. Qh3 Qxh3+ 36. Kxh3 Re4) 35. Rh1 $11 {[%csl Gh1][%cal Rh5h8]} Kf8 {Strongly threatening ...Qf5.} 36. Qf3 Qg4+ $1 37. Qxg4 Rxg4+ 38. Kf3 Rb4 39. Rb1 Ke7 40. Re1 {Hoping for Bxc5+.} Kd7 (40... Kd8 $5 {[%cal Rb4b2]} 41. Re2 Rh4 $15) 41. Re2 Rh4 42. b3 {Accuracy: White = 76%, Black = 86%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Sadzikowski, Daniel"]
[Black "Socko, Bartosz"]
[Result "1-0"]
[ECO "C87"]
[WhiteElo "2374"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,91,44,50,44,44,43,39,53,83,73,74,75,78,72,80,79,91,81,101,105,120,116,101,91,93,93,94,86,104,99,115,97,117,27,158,159,295,237,293,287,289,288,284,243,806,790,1447,1367,1769,1785,1604,1579,1204,684,677,675,427,431,6270,3334,1616,0,5821,2277,7304,7478,11386,8966,6195,5874,5173,29969,29966,29969,5493,29956,9288,8858]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 d6 7. c3 Bg4 8. d3 Nd7 9. Be3 {C87: Closed Ruy Lopez: Steinitz-type lines after 6 Re1 d6.} O-O 10. Nbd2 {[#]} Bf6 $146 ({Predecessor:} 10... f5 11. h3 fxe4 12. hxg4 exf3 13. Qb3+ Kh8 14. Qxb7 Na5 15. Qe4 c6 16. Bxc6 Nf6 17. Qxf3 Nxc6 18. Qxc6 Nxg4 {½-½ (46) Kurnosov,I (2577)-Iuldachev,S (2526) Tashkent 2008}) 11. h3 {White is slightly better.} Bxf3 12. Nxf3 Ne7 13. d4 {Hoping for Bxd7.} c6 14. Bb3 Qc7 15. Qe2 Rad8 16. Rad1 h6 17. dxe5 dxe5 18. Nh2 {Black must now prevent Ng4.} c5 19. Ng4 {Threatens to win with Rxd7!} Bg5 20. Bxg5 hxg5 21. Rd2 b5 22. Red1 c4 23. Bc2 f6 24. b4 (24. b3 $16) 24... Rfe8 {[#]} (24... Nb6 $11 {keeps the balance.}) 25. h4 $1 $16 {[%mdl 512]} gxh4 {[#]} (25... Nf8 $16) 26. Rxd7 $1 $18 {[%mdl 512]} Rxd7 {[#]} (26... Qxd7 27. Rxd7) 27. Nxf6+ $1 {[%mdl 512]} gxf6 28. Qg4+ {[%mdl 64] Double Attack} Kf7 29. Rxd7 Qc8 $2 (29... Qc6 30. Qh5+ Kf8) 30. Bd1 Rh8 31. Qf5 Qc6 32. Bh5+ Rxh5 33. Qxh5+ {[%mdl 4160] Endgame Double Attack. KQR-KQN} Ke6 34. Qg4+ f5 35. Rxe7+ $1 Kxe7 36. Qxh4+ {KQ-KQ} Kd7 (36... Qf6 $142 37. Qh7+ Kd6) 37. Qh7+ Kd8 38. Qh4+ (38. Qh8+ $142 Ke7 39. Qg7+ Ke8 40. Qxe5+ Kf7 41. Qxf5+ Ke8 42. g4) 38... Kd7 39. exf5 Qd5 40. Qh7+ Kd6 41. Qg6+ Kc7 42. f6 Kd6 43. f7+ (43. Qe8 $18 Qd1+ 44. Kh2) 43... Ke7 44. Qg7 Qxf7 45. Qxf7+ Kxf7 46. f3 {Accuracy: White = 89%, Black = 49%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Teclaf, Pawel"]
[Black "Bartel, Mateusz"]
[Result "1/2-1/2"]
[ECO "C52"]
[WhiteElo "2360"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,84,-19,-15,-24,-37,-32,-22,-12,-49,-37,-48,-38,-38,-37,-36,-37,-34,-34,-63,-63,-56,-31,-70,-29,-51,-45,-44,-49,-56,-37,-57,-54,-66,-5,-10,-6,-35,-62,-43,-30,-11,-21,-14,-14,-34,-27,-28,-31,-22,-7,-8,-15,-14,0,0,0,0,0,0,0,-14,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8. O-O Bb6 {C52: Evans Gambit Accepted: 5 c3 Ba5.} 9. Nbd2 $1 {[%mdl 4] now scores much better than the old 9.Bb5.} Na5 10. Qc2 {[#]} Qe7 $146 ({Predecessor:} 10... Nxc4 11. Nxc4 exd4 12. cxd4 Ne7 13. a4 c6 14. Ba3 Bc7 15. e5 dxe5 16. dxe5 O-O {½-½ (39) Mamedyarov,S (2747)-Ding,L (2766) Huaian 2016}) 11. a4 Nf6 12. Ba3 c5 ({But not} 12... Nxc4 13. Nxc4 c5 14. Nxd6+ (14. dxe5 dxe5 15. Nfxe5 Bc7 $11) 14... Qxd6 15. dxe5 $14) 13. Bb5+ Nd7 14. Rfe1 O-O 15. Nf1 Nf6 16. dxe5 dxe5 17. Ne3 Bc7 18. Bd3 Bg4 19. Nxg4 Nxg4 20. Nd2 Rfd8 {aiming for ...Qh4.} 21. Be2 Nf6 22. Nf1 Qe6 23. Rab1 c4 (23... Bb6 $15) 24. Bb4 $1 $11 Qc6 25. Ne3 Qxe4 ({Not} 25... Nxe4 $2 26. Bf3 $18) 26. Qa2 Rd7 27. Bf3 Qf4 {[#] Strongly threatening ...e4.} 28. Bxa5 $1 Bxa5 29. Bxb7 Rad8 {And now ...Rd2 would win.} 30. g3 Qg5 31. Qxc4 h5 {The position is equal.} 32. Rb5 {[#] Bc6 is the strong threat.} Rc7 33. h4 Qxe3 34. Rxe3 Rxc4 35. Rxa5 Rd1+ 36. Kg2 Ng4 37. Rf3 g6 38. Rd5 $1 {[%cal Rd5d1]} Rxd5 $1 39. Bxd5 Rc7 40. c4 Kf8 41. Rb3 Nf6 42. Rb5 Ke7 {Accuracy: White = 87%, Black = 87%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.3"]
[White "Bartel, Mateusz"]
[Black "Teclaf, Pawel"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2615"]
[BlackElo "2360"]
[Annotator "TA"]
[PlyCount "122"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,122,-42,-18,-4,-10,0,0,0,0,-8,0,0,0,0,62,63,106,104,56,52,86,71,76,77,94,89,79,-24,-29,-43,-37,-61,-41,-76,-75,-72,-68,-152,-123,-120,-123,-123,-127,-241,-236,-354,-304,-304,-295,-293,-302,-293,-285,-324,-308,-312,-306,-306,-287,-346,-351,-345,-326,-346,-338,-356,-354,-335,-324,-344,-334,-331,-291,-373,-358,-396,-394,-408,-402,-405,-397,-383,-358,-519,-519,-686,-418,-1077,-680,-587,-302,-306,-275,-565,-558,-800,-779,-975,-888,-12837,-12832,-3420,-6300,-6620,-7204,-29987,-29978,-12845,-12845,-12845,-12844,-12846,-12845,-29991,-29992]} 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Bg2 d5 5. b3 Be7 6. Nf3 {A34: Symmetrical English: 2 Nc3, lines with ...d5.} d4 7. Na4 $1 Nc6 {[#]} 8. Ba3 $146 {The position is equal.} ({Predecessor:} 8. Nb2 O-O 9. Nd3 Bd6 10. O-O e5 11. Ng5 Bf5 12. e4 Bg6 13. f3 h6 14. Nh3 {0-1 (41) Karwen,W (1498)-Horch,H (1697) Binz 2013}) 8... Nd7 9. e3 e5 10. O-O O-O 11. exd4 e4 (11... exd4 $11 12. d3 Rb8) 12. Ne5 $1 $14 {[%cal Re5d7]} cxd4 13. Nxc6 bxc6 14. Bb2 Nf6 {[#]} 15. d3 $1 {[%cal Rd3e4]} Bg4 16. Qd2 exd3 17. Qxd3 c5 18. Rfe1 (18. Bxa8 $16 Qxa8 19. Rfe1 (19. f3 Bd7 $14)) 18... Rc8 $11 19. Ba3 Bd6 20. Qd2 Nd7 21. f4 Nf6 22. Nb2 Bf5 23. h3 (23. Bb7 $15) 23... Nh5 24. Qf2 Qa5 25. Na4 Bd7 26. Bf3 (26. Nxc5 $17 Bxc5 27. Bxc5 Rxc5 28. Qxd4) 26... Nf6 $19 ({Don't do} 26... Bxa4 27. Bxh5 Bd7 28. Bc1) 27. Bd1 (27. Bxc5 $142 Bxc5 28. Nxc5 Qxc5 29. Re5) 27... Bxh3 28. Bc1 Bf5 29. Bd2 Qc7 30. Bf3 Rfe8 31. Rxe8+ Rxe8 32. Re1 Rxe1+ 33. Qxe1 h5 34. Nb2 {[#]} h4 $1 {[%mdl 512]} 35. g4 (35. gxh4 Bxf4) 35... Bxg4 36. Bxg4 Nxg4 37. Qxh4 Bxf4 {...f5 is the strong threat.} 38. Qxg4 Bxd2 39. Nd3 g6 40. Kg2 Be3 41. Qe4 Qa5 42. Qe8+ Kg7 {Threatens to win with ...Qd2+.} 43. Qe5+ Kh7 {Hoping for ...Qd2+.} 44. Qh2+ {[#]} Bh6 $1 45. Kf3 Qd8 46. Qe5 (46. Ke2 $142) 46... Qh4 47. Kg2 Qg4+ 48. Kh2 (48. Qg3 $142 Qe2+ {[%mdl 64] Double Attack} 49. Nf2) 48... Qf3 49. Qg3 Qxg3+ 50. Kxg3 {[%mdl 4096] Endgame KB-KN} Bf8 51. Kf3 $2 (51. b4) 51... f5 52. a3 a5 53. Ne5 g5 54. Nc6 g4+ 55. Ke2 Bd6 56. Nxa5 f4 57. Nb7 f3+ 58. Kf2 d3 59. Ke3 g3 {( -> ...g2)} 60. Nxd6 g2 61. Kf2 d2 {Accuracy: White = 43%, Black = 89%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.3"]
[White "Pakleza, Zbigniew"]
[Black "Piorun, Kacper"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2555"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "102"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,101,-6,2,0,0,0,-7,12,13,0,18,15,43,0,0,0,0,-46,-34,-32,-15,-56,-21,-60,-65,-64,-68,-61,-61,-70,-63,-63,-78,-69,0,-179,-179,-178,-178,-175,-169,-177,-177,-190,-190,-190,-190,-220,-208,-236,-209,-269,-237,-237,-230,-203,-193,-220,-201,-195,-206,-273,-289,-293,-279,-390,-374,-424,-368,-416,-422,-411,-398,-533,-535,-597,-603,-656,-625,-640,-639,-729,-760,-757,-706,-781,-789,-29961,-2885,-1082,-866,-826,-545,-29999]} 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. e3 Bd6 5. d4 O-O 6. Be2 {A17: English Opening: 1...Nf6 with ...Bb4.} dxc4 7. Bxc4 c5 8. O-O {The position is equal.} cxd4 9. exd4 Nc6 10. Qe2 Nd5 11. Ne4 Be7 12. Rd1 b6 {[#]} 13. Bg5 $146 ({Predecessor:} 13. a3 Bb7 14. Neg5 Na5 15. Bd3 g6 16. Bc2 Rc8 17. h4 Qc7 18. Ne1 Nf4 19. Bxf4 Qxf4 20. b4 {0-1 (47) Kursova,M (2351)-Bronnikova,E (2245) Belgrade 2013}) 13... Bb7 14. Rac1 Rc8 15. a3 h6 {[%cal Re7g5]} 16. Bxe7 Ncxe7 17. g3 Nf5 18. Ba6 Qe7 19. Rxc8 Rxc8 20. Bxb7 Qxb7 21. Ne5 Nde3 ({Black should play} 21... Qc7 $15 22. Nf3 g5) 22. fxe3 $2 {[#] Black keeps a firm grip on the game.} (22. Qf3 $1 $11 Nd5 23. Nc3) 22... Qxe4 $19 23. Qf3 Qxf3 24. Nxf3 Nxe3 {[%mdl 4096] Endgame KRN-KRN} 25. Re1 Nd5 26. Re2 a5 27. Kf2 Kf8 28. Ne5 Ke7 29. Rd2 f6 30. Ng4 Kd6 31. Ke2 Rc1 32. Nf2 Kc6 33. Kf3 h5 34. Re2 Kd7 35. h3 g5 36. Rd2 Re1 37. Rd3 Kc6 38. Rd2 Re3+ 39. Kg2 h4 40. gxh4 gxh4 41. Kh2 Nf4 42. Rc2+ Kd5 43. Rc8 Kxd4 44. Rd8+ Nd5 45. Rh8 Re2 46. Kg1 Ke3 47. Ng4+ Kf3 48. Rxh4 Kg3 (48... f5 $142 49. Rh7 fxg4 50. hxg4 Rxb2 51. Rh3+ Kxg4 52. Rh7 Ra2 53. Kf1 Rxa3 54. Ke2 b5 55. Kd2 a4 56. Kc2 Ra2+ 57. Kd3 a3 58. Rg7+ Kf5 59. Rf7+ Ke5 60. Rf1 b4 61. Re1+ Kd6 62. Rh1 Rb2 63. Rh8 a2 64. Ra8 Rb3+ 65. Ke2 Ra3 66. Rxa3 bxa3 67. Kf2 a1=Q 68. Kf3 a2 69. Kf2 Qb2+ 70. Kf3 a1=Q 71. Kg3 Qg1+ 72. Kh4 Qh8#) 49. Kf1 Nf4 50. Rh8 Rxb2 {[%cal Rb2b1] [#]} 51. Nxf6 Rb1# {Accuracy: White = 48%, Black = 81%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.3"]
[White "Gajewski, Grzegorz"]
[Black "Janik, Igor"]
[Result "1-0"]
[ECO "D26"]
[WhiteElo "2515"]
[BlackElo "2531"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,107,20,28,22,18,15,27,31,10,11,45,38,31,17,40,0,0,0,0,0,0,0,22,33,38,41,114,103,118,112,109,120,150,67,64,56,63,66,56,56,75,59,106,91,133,67,67,65,61,61,70,70,78,72,97,88,364,364,430,379,364,364,429,416,429,424,388,388,997,993,939,932,1240,1170,1041,577,952,935,936,825,6099,6075,29985,2567,5654,5208,5061,2381,4133,3260,29979,29980]} 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. O-O b5 7. Bd3 Bb7 8. a4 b4 9. Qe2 c5 10. Nbd2 {[%cal Bb1d2,Bd2c4,Bc4e5][%mdl 32] D28: Queen's Gambit Accepted: Classical main line: 7 Qe2 with early ...Nc6.} Be7 11. Nc4 O-O 12. a5 {White has an edge.} Nbd7 13. Rd1 Qb8 14. Bd2 Rd8 15. Rac1 {[#]} Bc6 $146 ({Predecessor:} 15... cxd4 16. exd4 Bd5 17. Nfe5 Nxe5 18. dxe5 Nd7 19. Bf4 Qb7 20. Qg4 Nc5 21. Nd6 Bxd6 22. exd6 Rac8 23. Rxc5 Rxc5 24. Qh4 {1-0 (24) Tukmakov,V (2565)-Speelman,J (2600) Tilburg 1994}) 16. Nce5 Ba4 17. Re1 {And now b3 would win.} Nxe5 18. Nxe5 Be8 19. Nc4 cxd4 20. Nb6 Ra7 21. exd4 Qb7 (21... Nd5 $14) 22. Bf4 $16 Bc6 {[#]} 23. Be5 $1 Nd7 24. Nxd7 Rxd7 25. Bxh7+ (25. Qg4 $16 {[%csl Ge5][%cal Rg4g7]} Bf8 26. Qh4) 25... Kxh7 $14 26. Qc2+ {[%mdl 64] Double Attack} Kg8 27. Qxc6 Qxc6 28. Rxc6 Rd5 29. Bc7 b3 30. Bb6 Ra8 31. Re3 ({Better is} 31. Kf1 $16) 31... Bb4 $1 32. Rxb3 Bxa5 {With the idea ...Rb8.} 33. Bc5 e5 34. g3 exd4 {[#] ...d3 is the strong threat.} 35. Rd3 $36 {[%mdl 2048] Black is under strong pressure.} Rad8 36. b4 Rxc5 $4 {[%mdl 8192] Loses the game.} (36... Rb8 $16) 37. bxc5 $16 {[%mdl 4096] Endgame KRR-KRB} Rd5 38. Rd6 Rxc5 39. R3xd4 ({Don't play} 39. R6xd4 Bb6 $18) 39... Rc1+ 40. Kg2 Be1 41. Rxa6 Rc2 42. Rf4 Bd2 $2 (42... Rc7 43. Rfa4 Rc2) 43. Ra8+ $18 Kh7 44. Rxf7 Be3 45. h4 Bd4 46. Rf4 Be5 47. Rf5 Bd4 48. h5 Rb2 49. g4 {White threatens g5 and mate.} g6 50. hxg6+ (50. Rf7+ $142 Kh6 51. Rg8 Rb6 52. f4 Be5 53. fxe5 Rc6 54. Rxg6+ Rxg6 55. hxg6) 50... Kxg6 51. Ra6+ Kg7 52. Kg3 Rb3+ 53. f3 Rb1 54. Rd5 {Accuracy: White = 78%, Black = 42%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.3"]
[White "Gumularz, Szymon"]
[Black "Tomczak, Jacek"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "2513"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,52,0,5,5,9,9,11,0,0,0,0,-3,0,0,0,0,-1,-12,7,-9,-23,-28,-39,-46,-37,-47,-50,-59,-61,-70,-69,-247,-246,-393,-394,-418,-394,-510,-497,-497,-79,-405,-387,-923,-905]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4 Bb4 5. d3 d6 6. a3 {A28: English Opening: Four Knights Variation.} Bc5 7. b4 Bb6 8. Na4 {The position is equal.} Bd4 9. Nxd4 {9.Rb1 gains popularity. Played by Ian Nepomniachtchi in May 2020.} Nxd4 10. Nc3 a5 11. b5 {[#]} a4 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 11... O-O 12. Be2 c6 13. O-O cxb5 14. Nxb5 Nxb5 15. cxb5 a4 16. Bb2 Be6 17. f3 Nh5 {0-1 (38) Najer,E (2635)-Giri,A (2780) Khanty-Mansiysk 2019}) 12. Nxa4 c6 {aiming for ...Qa5+.} 13. Nc3 $1 d5 (13... Nd7 {seems wilder.} 14. Be2 Nc5 15. O-O O-O 16. a4 f5) 14. bxc6 dxc4 15. dxc4 bxc6 16. Bd3 Nd7 {[%mdl 1024] Black has compensation.} 17. O-O Nc5 {Strongly threatening ...Ndb3.} 18. Rb1 O-O 19. a4 Qa5 $1 {[%csl LRa4,LRc3]} 20. Ba3 $2 (20. Ne2 $1 $15) 20... Nxd3 $19 21. Bxf8 (21. Qxd3 {was forced.} Qxc3 {[%mdl 64] Remove Defender, Deflection, Decoy} 22. Qxc3 Ne2+ {[%mdl 64] Double Attack} 23. Kh1 Nxc3 24. Rbc1 Nxe4 25. f3) 21... Qxc3 22. Bd6 Be6 23. Qh5 Nf4 24. Qxe5 {If only White now had time for Kh1....} Nde2+ 25. Kh1 {[#] White wants to play Qxc3.} Bh3 $1 {[%csl Gf4][%cal Rh3g2][%mdl 512]} 26. Rg1 $2 {[#]} (26. Qxf4 Nxf4 27. Bxf4) (26. gxh3 Qf3#) 26... Nd3 $1 {[%mdl 576] Double Attack. Accuracy: White = 67%, Black = 91%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.4"]
[White "Socko, Bartosz"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "E09"]
[WhiteElo "2609"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,99,0,0,0,13,0,-3,0,-3,-34,-25,-25,-31,-25,-14,-6,-12,0,-11,-12,9,-8,-4,-5,-7,-8,-4,-5,0,0,7,0,0,0,0,0,0,-3,-7,-9,-2,-8,-8,-12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6 {[%cal Bb7b6,Bb6b5][%mdl 32]} 9. Rd1 Bb7 10. b3 {E06: Closed Catalan: Early deviations.} c5 11. e3 Rc8 12. Bb2 b5 {[#]} 13. Ne5 $146 ({Predecessor:} 13. dxc5 Bxc5 14. Qb1 Qb6 15. b4 Be7 16. c5 Qc7 17. Nd4 a6 18. a4 bxa4 19. Rxa4 {½-½ (66) Muse,M (2510)-Kalka,A (2378) Germany 2001}) 13... cxd4 14. exd4 Nxe5 15. dxe5 Nd7 16. Qb1 {The position is equal.} bxc4 17. bxc4 Nb6 18. Bd4 Qc7 19. Bxb6 axb6 20. cxd5 exd5 21. Qb2 Bc5 22. Nb3 Rfd8 23. Rd3 Ba8 24. Rad1 {[%cal Rg2d5]} d4 25. f4 Bxg2 26. Qxg2 Ra8 27. Kh1 {[%cal Rb3d4]} Ra4 28. R1d2 g6 29. Qe4 Qa7 30. e6 {[%cal Rb3d4]} Qa8 (30... f5 {with more complications.} 31. e7 Bxe7 32. Qe6+ Kg7 33. Nxd4 Qb7+) 31. Qxa8 Rdxa8 32. Nxd4 Bxd4 33. exf7+ Kxf7 {[#] And now ...Bc5 would win.} 34. Rxd4 Rxd4 35. Rxd4 Rxa2 $11 {[%mdl 4096] Endgame KR-KR} 36. Rb4 Ra6 37. Kg2 Ke6 38. Kf3 Kd5 39. Rb1 Kc5 40. Rc1+ Kd6 41. Rd1+ Ke6 42. Rb1 Kd5 43. Kg4 h6 44. f5 gxf5+ 45. Kxf5 Kc4 46. Rc1+ Kd5 47. Rd1+ Kc5 48. Rc1+ Kd5 49. Rb1 Kc4 50. Rc1+ {Not much happened in this game. Accuracy: White = 97%, Black = 100%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.4"]
[White "Piorun, Kacper"]
[Black "Pakleza, Zbigniew"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2539"]
[BlackElo "2555"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,65,47,47,44,47,40,48,39,61,42,55,51,70,53,70,60,101,89,98,106,103,70,77,64,72,69,106,92,106,91,433,302,305,236,458,440,620,614,684,545,537,522,542,546,545,433,447,0,394,343,575,566,550,500,941,918,29976,29974]} 1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. h3 b5 5. Bd3 e5 6. Nf3 {B07: Pirc Defence: Miscellaneous Systems.} Nbd7 7. O-O Be7 8. Ne2 {White is slightly better.} O-O {[#]} 9. Ng3 $146 ({Predecessor:} 9. c3 Bb7 10. Ng3 Re8 11. a4 a6 12. Re1 Bf8 13. Nf5 d5 14. dxe5 dxe4 15. exf6 Nxf6 {½-½ (31) Muench,I (2185)-Solonar,S (2310) Weilburg 1996}) 9... Re8 10. c3 Bf8 11. a4 bxa4 12. Qxa4 Qb6 13. Be3 {[#] dxe5 is the strong threat.} Qc7 14. Qa5 $36 {[%mdl 2048] White is in control.} Qb7 15. dxe5 Nxe5 16. Nxe5 Rxe5 17. Qa4 {Black is now going downhill.} c5 18. Bf4 Bd7 19. Qa6 Qxb2 $2 {[%mdl 8192]} (19... Qxa6 $16 20. Rxa6 Ree8) 20. Bxe5 dxe5 21. Bc4 Be8 $2 (21... Bc8 22. Qa5 Qb7) 22. Rab1 $18 Qxc3 (22... Qc2 $142 23. Rfc1 Qa4 24. Bxf7+ Kh8 25. Qxa4 Bxa4) 23. Rfd1 h5 24. Qb7 h4 25. Nf5 {[%cal Bg3f5,Bf5e3,Be3d5][%mdl 32] [#] Threatens to win with Ne3.} (25. Qxa8 hxg3 26. Rbc1 gxf2+ 27. Kxf2 Qa3 $18) 25... Qxc4 26. Qxa8 Kh7 27. Rb8 Qa4 28. Rbb1 $2 (28. Rbd8 $18) 28... c4 $2 {[%mdl 8192]} (28... Qc4 $1 $11 29. Nxh4 Qxe4 30. Qxe4+ Nxe4) 29. Ra1 Qc2 $2 (29... Qb5 {was necessary.} 30. Rdb1 Qc6) 30. Ne3 Qe2 31. Re1 Qd3 (31... Qd2 $142 32. Qc8 Qd7 33. Qxc4 Qd4) 32. Nd5 Nxe4 33. Rxe4 {[%mdl 64] Double Attack. Accuracy: White = 81%, Black = 38%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.4"]
[White "Janik, Igor"]
[Black "Gajewski, Grzegorz"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2531"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,114,4,6,15,6,6,0,0,7,0,0,0,0,0,17,12,63,-11,0,-9,-15,-14,-17,-26,8,0,12,8,43,33,33,40,29,18,42,39,35,14,8,-52,-52,-52,-60,-52,51,51,51,51,52,52,55,49,54,52,50,49,50,56,109,53,91,52,64,55,111,91,157,142,128,130,164,147,142,0,0,6,3,9,15,0,0,7,8,0,77,9,12,0,0,0,0,0,0,0,0,0,0,0,0,-9,0,0,-9,-25,0,0,12847]} 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4 5. Qa4+ Bd7 6. Qxc4 {A13: English Opening: 1...e6.} c5 7. Ne5 Qc8 8. O-O Nc6 9. Nxd7 Qxd7 10. Nc3 Be7 11. d3 O-O 12. Bg5 b6 (12... Rfc8 $11) 13. b4 (13. d4 $1 $14) 13... Rac8 $11 {[#]} 14. bxc5 $146 ({Predecessor:} 14. Bxc6 Rxc6 15. b5 Rd6 16. Be3 Rc8 17. Qb3 Ng4 18. Rad1 h5 19. Bc1 Rd4 20. a3 {0-1 (49) Reizniece Ozola,D (2283)-Schmidt Schaeffer,S (2373) Germany 2018}) 14... Nd4 15. c6 Nxc6 {[#] Strongly threatening ...Nd4.} 16. Qa4 h6 (16... Rfd8 $5 {[%cal Rc6d4]} 17. Be3 Nd4 18. Qxd4 Qxd4 19. Bxd4 Rxd4 $11) 17. Bxf6 Bxf6 18. Rac1 Nb8 19. Qxd7 Nxd7 20. Nb5 $1 a6 21. Nd6 Rxc1 22. Rxc1 Nc5 23. Nc4 Na4 24. e3 ({White should try} 24. Rc2 $11) 24... Rc8 $1 $15 25. Bb7 Rc7 $1 {[%cal Rc7b7]} 26. Bxa6 Nc5 (26... Ra7 $1 $15 27. Bc8 Nc3) 27. Bb5 $14 Nxd3 28. Rb1 Ne5 29. Nxb6 Rb7 30. Nc8 Nf3+ 31. Kg2 Nd2 32. Rd1 {And now Nd6 would win.} Rxb5 33. Rxd2 {[%mdl 4096] Endgame KRB-KRN} g6 (33... Ra5 $14) 34. Nd6 ({Better is} 34. a4 $16 Rc5 35. Nd6) 34... Rb4 35. Kf3 Be5 36. Ne4 Kg7 (36... Rc4 $14) 37. Rd7 $16 Rc4 (37... g5 $142) 38. Ra7 g5 {With the idea ...g4+!} 39. h3 Kg6 40. g4 f5 {[#]} 41. gxf5+ (41. Ng3 $1 $16) 41... exf5 $11 42. Ra6+ Kg7 43. Nd2 Rc2 44. Nb3 h5 45. Ra5 g4+ 46. hxg4 hxg4+ 47. Kg2 Kf6 48. Nc5 {Threatens to win with Nd7+.} Bd6 49. Ra6 Ke7 50. Nd3 g3 51. Kf3 Rd2 52. Ra7+ Kf6 (52... Ke6 $5 53. Nf4+ $8 Bxf4 54. exf4 gxf2 $11) 53. Ra6 Rxd3 54. fxg3 Ke5 {Hoping for ...Bc5.} 55. Ra5+ Ke6 {Threatening ...Rc3.} 56. Ra6 Ra3 57. Rxa3 Ke5 $2 {[%mdl 40960] Accuracy: White = 87%, Black = 74%. . An unexpected result.} (57... Bxa3 $11 58. e4 Kf7) 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.4"]
[White "Teclaf, Pawel"]
[Black "Bartel, Mateusz"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2360"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,100,15,12,9,10,8,11,16,19,0,3,-15,-8,-18,0,-43,-40,-64,-52,-50,-40,-36,-27,-88,-81,-88,-87,-80,-89,-139,-73,-80,-78,-72,-53,-63,-62,-66,-41,-95,-25,-36,-37,-47,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,11,4,0,3,0,0,0,197,193,283,91,106,58,225,130,119,116,130,9,49,49,49,49,49,49,58,58,62,65,65,65,47]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 d6 5. Na4 Qf6 6. Nxc5 {C50: Hungarian Defence and Giuoco Pianissimo.} dxc5 {[#]} 7. d3 $146 ({Predecessor:} 7. c3 Be6 8. Qb3 Bxc4 9. Qxc4 b6 10. O-O Nge7 11. b4 cxb4 12. cxb4 Rc8 13. Bb2 {½-½ (30) Bonade,M (2097)-Passerotti,P (2231) Biella 2017}) 7... h6 8. Be3 {The position is equal.} b6 9. h3 Nge7 10. Qe2 Be6 11. Nd2 Bxc4 12. dxc4 Nd4 $36 {[%mdl 2048] Black fights for an advantage.} 13. Qd1 Qg6 14. O-O Rd8 15. c3 O-O 16. Nb1 (16. b4 $11) 16... Ne6 $17 17. Qg4 Rd3 18. Qxg6 Nxg6 19. Nd2 Rfd8 (19... Nh4 $142 20. Nb3 Rfd8) 20. Nf3 f6 21. Rfc1 Kf7 22. Kf1 Ngf4 23. h4 g5 24. g3 (24. hxg5 $15 hxg5 25. g3) 24... Ng6 (24... g4 $17 25. Ng1 R3d7) 25. hxg5 hxg5 26. Ke2 R3d6 (26... Nef4+ {is more complex.} 27. Kf1 a5 28. Re1 a4 29. a3 Ne7) 27. Rh1 Rh8 28. Rxh8 Nxh8 29. Rh1 Kg7 30. Nh2 Nf7 31. Ng4 Rd8 32. f3 Nd6 33. b3 Nf8 34. Bc1 Ng6 35. Ne3 Ne7 36. Bd2 Kg6 37. Ng4 {Hoping for Rh6+.} Nf7 38. f4 Nd6 $2 (38... exf4 $11 {and Black is okay.} 39. gxf4 Nc8) 39. Rh6+ $18 Kg7 (39... Kf7 {was called for.}) 40. fxg5 $2 (40. fxe5 $18 {and the rest is easy.} Ng8 41. exf6+ (41. exd6 Nxh6 42. dxc7 Rc8 $17) 41... Nxf6 42. Rxf6 Nxe4 43. Rc6 (43. Bxg5 Nxg5 44. Rc6 Re8+ 45. Ne3 Ne6 $16) 43... Nxd2 44. Rxc7+ {[%mdl 64] Double Attack} Kg6 45. Rc6+ (45. Rxa7 Ne4 $16) 45... Kg7 46. Nf6) 40... f5 $16 41. Re6 Ng6 $2 {[#]} (41... Nxe4 $14 42. Rxe7+ {[%mdl 64] Double Attack} Kf8 43. Rxc7 (43. Rxe5 Rxd2+ 44. Ke3 fxg4 $14) 43... Rxd2+ 44. Ke3 Rd1) 42. Nxe5 ({Better is} 42. Rxd6 $1 $18 {[%mdl 512]} cxd6 43. exf5) 42... Nxe5 43. Rxe5 Nxe4 $18 {[%mdl 4160] Endgame [#] Double Attack. KRB-KRN} 44. Be1 ({White should play} 44. Bf4 $1 $16) 44... Nxg5 45. Rxf5 {White is slightly better.} Re8+ 46. Kd1 Kg6 47. Rf4 Rh8 48. Bd2 Rh1+ 49. Kc2 {Strongly threatening Rg4.} Ne6 50. Rf2 Rg1 {Blacks defense is rewarded with a draw. Accuracy: White = 73%, Black = 73%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.5"]
[White "Piorun, Kacper"]
[Black "Pakleza, Zbigniew"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2601"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,115,-31,-26,-14,-15,-23,-12,-30,-30,-30,-29,-37,-36,-42,-31,-57,-35,-32,-21,-29,-29,-41,-29,-39,-31,-40,-29,-31,-8,-12,-6,-8,0,-21,-6,-6,-8,-15,-7,-27,0,-7,0,-10,0,0,0,0,0,0,0,0,0,-13,12,-7,34,27,75,86,104,54,95,54,66,75,307,309,285,304,417,417,387,423,530,530,492,517,518,508,653,685,737,675,683,643,659,641,600,573,961,925,938,885,928,899,1310,1283]} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. Nbd2 Na5 8. g3 Bd7 9. Bg2 h6 10. O-O Ne7 11. Rb1 {C02: French: Advance Variation.} Qc7 12. Re1 Nc8 13. h4 {The position is equal.} Nb6 14. Nf1 Be7 15. N1h2 O-O-O {[#]} 16. Bh3 $146 ({Predecessor:} 16. Ng4 Rdg8 17. Bf4 Kb8 18. Qe2 Ka8 19. Nd2 Ba4 20. Nf1 Qd8 21. Nfh2 Qf8 22. Bf3 {0-1 (41) Low,Z (1997)-Gong,Q (2349) Yangon 2014}) 16... Kb8 17. Rf1 a6 18. Qe2 Ka7 19. Kg2 Rde8 20. h5 Bd8 21. Bf4 Ba4 22. Rbe1 Nc6 {[%cal Ba5c6,Bc6e7,Be7f5][%mdl 32]} 23. Qd2 Ne7 24. Rh1 Reg8 25. Ng4 Nf5 26. Qe2 Qc6 27. Kg1 Qb5 28. Bg2 Qb3 29. Rc1 Bd7 30. Qd2 Ba4 (30... Qa2 {seems wilder.} 31. Kh2 Na4 32. Rc2 Qb3 33. Rb1 Be7) 31. Ne3 Nxe3 32. Bxe3 Qb5 33. Bf1 Nc8 34. Be2 Ne7 35. Nh4 Nc6 36. b4 Be7 37. Ng2 a5 38. g4 axb4 39. axb4 Kb6 40. Rb1 Kc7 41. Rh3 Ra8 42. f4 f5 $2 {[#] Black cannot hold the game after this.} (42... Na5 $16 {is a better defense.}) 43. gxf5 $18 exf5 44. Bf2 Na5 45. Ne3 Nb3 46. Qe1 Rhf8 {White is clearly winning.} 47. Bf3 Rad8 48. Rg3 Kb8 49. Bg2 Rf7 50. Rg6 Bf8 51. e6 Rc7 52. Nxf5 Bxb4 53. cxb4 c3 {intending ...c2.} 54. e7 Rh8 {...c2 would now be nice for Black.} 55. Nd6 Qxb4 56. e8=Q+ {[%mdl 64] [#] Promotion} Bxe8 57. Nxe8 c2 58. Nxc7 {Accuracy: White = 93%, Black = 68%.} ({Inferior is} 58. Qxb4 cxb1=Q+ 59. Bf1 Rxe8 $11) 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.6"]
[White "Krzyzanowski, Marcin"]
[Black "Krasenkow, Michal"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2521"]
[BlackElo "2602"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,80,28,37,0,13,0,4,-13,-12,-34,-50,-68,-72,-69,-64,-64,-56,-68,-48,-65,-61,-111,-108,-108,-102,-91,-43,-59,-64,-62,-51,-199,-185,-183,-172,-167,-175,-214,-219,-221,-200,-222,-198,-218,-175,-225,-221,-228,-231,-229,-223,-222,-203,-213,-152,-259,-257,-285,-283,-300,-303,-290,-287,-305,-313,-307,-301,-293,-302,-290,-271]} 1. d4 d5 2. Nf3 c6 3. Bf4 Bf5 4. e3 Qb6 5. Qc1 e6 6. Be2 Nf6 7. h3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} c5 8. O-O Nc6 {[%cal Rc5d4]} 9. dxc5 {The position is equal.} (9. c4 {keeps more tension.} cxd4 10. Nxd4 Nxd4 11. exd4 dxc4 12. Qxc4 Bd6 13. Bxd6 Qxd6 14. Qa4+) 9... Bxc5 10. c4 d4 {[#]} 11. exd4 $146 ({Predecessor:} 11. b3 Rd8 12. exd4 Nxd4 13. Nxd4 Bxd4 14. Be3 Bxe3 15. fxe3 O-O 16. Nc3 h6 17. Kh1 {0-1 (44) Blot,J (2253)-Rausis,I (2508) Montpellier 1999}) 11... Nxd4 12. Nxd4 Bxd4 13. Nc3 Ne4 $1 {[%cal Re4f2]} 14. Nd1 O-O 15. Be3 e5 16. Re1 Qa5 17. Rf1 Rac8 18. a3 Qa4 19. Bxd4 exd4 20. b4 $1 Qd7 $36 {[%mdl 2048] White is under pressure.} 21. Bd3 {[#] Loses the game.} (21. Qf4 $15) 21... Ng3 $1 $19 {[%mdl 576] Discovered Attack} 22. fxg3 Bxd3 23. Rf4 Bxc4 ({And not} 23... Rxc4 24. Qd2 $11) 24. Qd2 d3 25. Ne3 Be6 26. Kh2 Rfd8 27. Rd1 Qa4 28. Qb2 {intending Rd4.} Qb3 29. Qxb3 Bxb3 30. Rd2 Rc3 31. b5 g6 32. g4 Re8 33. Rf3 {[#]} (33. Nd1 $17 Bxd1 {[%mdl 64] Discovered Attack} 34. Rxd1) 33... Re5 $1 {Black has a decisive advantage.} 34. g5 Rxg5 35. Ng4 Rxb5 36. Nf6+ Kg7 37. Ne8+ Kf8 38. Nd6 Re5 39. Rdxd3 Rxd3 40. Rxd3 Bd5 {Accuracy: White = 74%, Black = 87%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.7"]
[White "Olszewski, Michal"]
[Black "Dziuba, Marcin"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2551"]
[BlackElo "2585"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,52,-14,-18,-18,-10,-10,-11,-6,0,-14,16,-18,-33,-20,19,4,7,-47,-50,-71,-56,-70,-30,-12,-17,-12,-9,-127,-118,-100,-104,-175,-183,-493,-515,-523,-513,-681,-702,-624,-589,-823,-635,-1446,-1469]} 1. e4 c5 2. Ne2 Nc6 3. Nbc3 Nd4 4. d3 g6 5. Be3 Bg7 $1 6. Qd2 {B23: Closed Sicilian: Lines without g3.} d6 7. Nd1 e5 (7... d5 {keeps more tension.} 8. f4 Nxe2 9. Bxe2 d4 10. Bf2 e5) 8. c3 {The position is equal.} Nc6 {[#]} 9. d4 $146 ({Predecessor:} 9. g3 Nf6 10. h3 d5 11. Bxc5 dxe4 12. d4 Nd7 13. Ba3 Nb6 14. Ne3 Be6 15. Rd1 {0-1 (27) Vastrukhin,O (2294)-Golovin,L (2463) Voronezh 2008}) 9... Nf6 {[#] And now ...exd4 would win.} 10. f3 cxd4 11. cxd4 d5 12. dxe5 Nxe5 13. Bd4 ({White should try} 13. Nec3 $1 $11) 13... Nc6 $36 {[%mdl 2048] Black has good play.} 14. e5 Nd7 15. f4 Nxd4 16. Nxd4 O-O 17. Nc3 Nc5 18. b4 (18. Qe3 $11 {keeps the balance.}) 18... Ne4 $17 19. Nxe4 dxe4 20. Bc4 {[#]} (20. Nb5 $17) 20... Qb6 $1 $19 21. Nb5 $2 (21. Nc2) 21... Be6 {Black is clearly winning.} 22. Bxe6 fxe6 23. a4 Rad8 24. Qf2 e3 25. Qe2 {If White can now play Qc4 this consolidates a bit.} a6 26. Nc3 Rxf4 {Accuracy: White = 36%, Black = 78%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.8"]
[White "Gajewski, Grzegorz"]
[Black "Janik, Igor"]
[Result "1-0"]
[ECO "D26"]
[WhiteElo "2618"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,105,19,28,7,22,24,29,25,16,12,30,6,6,7,34,38,29,29,19,22,65,56,49,55,51,64,56,29,28,17,27,19,17,12,127,128,140,139,462,456,452,448,471,493,493,300,281,64,549,549,528,491,635,727,480,483,473,480,480,476,426,381,388,378,29965,29964,29969,29971,29971,29972,29967,29967,29975,29976,29976,29977,29977,29978,29978,29979,29979,29980,29980,29981,29979,29981]} 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. O-O b5 7. Be2 Bb7 8. b3 Nbd7 9. Bb2 c5 10. a4 b4 11. Nbd2 Be7 12. Nc4 {D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4.} O-O 13. Nfe5 {13.Rc1 is the modern continuation.} cxd4 14. Bxd4 {White has an edge.} Nxe5 15. Bxe5 Nd5 {[#]} 16. Rc1 $146 ({Predecessor:} 16. Bf3 Rc8 17. Qd2 f6 18. Bb2 Bc5 {½-½ (18) El Debs,F (2544)-Bachmann,A (2633) Niteroi 2019}) 16... Bf6 17. Bxf6 gxf6 18. Bf3 $1 Rb8 19. Bxd5 Qxd5 {[%csl Gb7][%cal Rd5g2]} 20. Qg4+ Kh8 21. f3 $1 Rbd8 22. Qf4 Qg5 23. Qxg5 fxg5 24. Na5 Ba8 25. Rfd1 Kg7 26. Kf2 {next Rxd8 is good for White.} f5 27. Rc7+ Kg6 (27... Kf6 $1 $11 28. Rxd8 Rxd8) 28. Rxd8 $1 $16 {White stays focused until the end.} Rxd8 {[%mdl 4096] Endgame KRB-KRN} 29. Nc4 {And now Ne5+ would win.} Rd1 $2 {[%mdl 8192]} (29... Kf6 $16 {is tougher.}) 30. Ne5+ $18 Kh6 31. Rc8 $1 Bd5 32. Rg8 $1 Kh5 ({Inferior is} 32... Bxb3 33. Nf7+ Kh5 34. Rxg5+ Kh4 35. g3+ Kh3 36. Rh5#) 33. Kg3 Bxb3 {[#] White should prevent ...Rd5.} 34. h4 $1 {[%mdl 512] [#]} f4+ $1 {[%mdl 8704]} (34... gxh4+ 35. Kf4) 35. exf4 gxf4+ 36. Kxf4 {Kg3 would kill now.} Rd4+ {[#]} 37. Kg3 $1 Rxh4 38. Ng4 {White threatens Nf6+ and mate.} e5 39. Nf6+ Kh6 40. Kxh4 {[%cal Rf6g4]} Bxg8 41. Nxg8+ {KN-KP} Kg7 42. Ne7 Kf7 $2 (42... b3 $18 43. Nd5 Kf7) 43. Nc6 $1 {[%csl LRb4,LRe5] White mates.} b3 44. Nxe5+ {KN-K3P} Ke6 {[#]} 45. Nc4 $1 Kd5 46. Na3 b2 47. f4 Kc5 48. f5 Kb4 49. Nb1 Kb3 50. f6 Kc2 51. Na3+ Kb3 52. f7 Kxa3 53. f8=Q+ {Accuracy: White = 90%, Black = 69%.} 1-0

