[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.1"]
[White "Janik, Igor"]
[Black "Wojtaszek, Radoslaw"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "2495"]
[BlackElo "2694"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,116,26,18,25,45,41,47,17,24,19,11,4,8,11,25,26,34,19,25,15,33,0,0,0,0,0,0,-4,-1,-2,-8,-13,0,0,0,0,0,-17,0,-6,0,0,0,0,0,0,-6,-12,-14,-12,-9,-13,-6,-4,-7,-7,-6,-6,0,-3,-3,-3,0,-8,-8,-8,-9,-9,-7,-68,-61,-196,-204,-219,-219,-188,-191,-385,-385,-701,-635,-1378,-1310,-29967,-29968,-29972,-29973,-29973,-29974,-29974,-29971,-29969,-29972,-29972,-29973,-29973,-29974,-29974,-29975,-29975,-29976,-29976,-29977,-29978,-29979,-29979,-29980,-29994,-29995]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bf4 Bb4 6. cxd5 {D37: Queen's Gambit Declined: 5 Bf4.} Nxd5 7. Bd2 N5f6 8. g3 {White is slightly better.} b6 9. Bg2 {Black must now prevent Ne5.} Bb7 10. O-O O-O 11. Rc1 c5 12. a3 Bxc3 13. Bxc3 Rc8 14. dxc5 Nxc5 15. Bb4 Qe7 {[#]} 16. Bxc5 $146 ({Predecessor:} 16. Qc2 a5 17. Bxc5 Rxc5 18. Qb3 Rfc8 19. Rxc5 Qxc5 20. Rd1 Bd5 21. Qd3 Qc2 22. Ne1 Qxb2 {0-1 (82) Matlakov,M (2699)-Kramnik,V (2753) Moscow 2019}) 16... Rxc5 17. Qa4 a5 18. Rfd1 Rfc8 19. Rxc5 Qxc5 20. Qd4 Qxd4 (20... Kf8 {with more complications.} 21. Qxc5+ Rxc5 22. b4 axb4 23. axb4 Rc7) 21. Nxd4 Bxg2 22. Kxg2 $11 {[%mdl 4096] Endgame KRN-KRN} Kf8 23. Kf3 Ke7 24. e4 Nd7 25. Ke2 g5 26. f3 h5 27. Rd2 Rc1 28. Rc2 Rb1 29. Nc6+ Kf6 30. Ke3 Ne5 31. Nxe5 Kxe5 {KR-KR} 32. f4+ gxf4+ 33. gxf4+ Kd6 34. Kd4 Rd1+ 35. Ke3 Re1+ 36. Kd4 f5 37. e5+ Kd7 {Strongly threatening ...Re4+.} 38. Kc4 Kc6 39. Rd2 (39. Kd3+ $11 Kb5 40. Rc8) 39... Re4+ 40. Kb3 {This move loses the game for White.} (40. Rd4 $1 $15 b5+ 41. Kd3 Rxd4+ 42. Kxd4) 40... Rxf4 $19 41. Rd6+ Kc5 42. Rxe6 a4+ 43. Ka2 $2 {[#]} (43. Kc3) 43... Re4 44. Rh6 $2 (44. b3 Re2+ 45. Kb1) 44... Rxe5 45. Rxh5 Kd4 46. Rh6 f4 {Black mates.} 47. Rxb6 f3 48. Rf6 Ke3 49. b3 f2 50. bxa4 Re4 51. Rxf2 Kxf2 {KR-K3P} 52. Kb3 Ke3 53. a5 Kd4 54. Kb4 Kd5+ 55. Kb5 Kd6 56. Kb6 Re3 57. a6 Rb3+ 58. Ka7 Kc7 {Weighted Error Value: White=0.39/Black=0.03} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Wojtaszek, Radoslaw"]
[Black "Janik, Igor"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "2694"]
[BlackElo "2495"]
[Annotator "TA"]
[PlyCount "130"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,130,16,54,43,51,37,41,16,16,-3,51,62,58,44,37,44,37,2,5,0,16,0,0,0,0,0,0,-6,0,-20,-5,0,13,18,22,21,14,14,12,14,20,20,23,0,0,0,39,22,70,68,86,69,55,75,105,114,133,133,139,0,0,0,0,0,0,0,67,0,0,-133,-154,-141,-102,-107,-114,-118,-103,-172,-164,-472,-337,-457,-126,-138,-156,-197,-151,-261,-263,-250,-235,-550,-536,-414,-325,-376,-297,-580,-580,-686,-704,-1159,-995,-667,-453,-411,-381,-309,-154,-195,-169,-467,-467,-681,-620,-29956,-895,-29969,-29973,-29967,-29963,-4890,-4245]} 1. d4 e6 2. c4 b6 3. a3 Bb7 4. Nc3 f5 5. Bf4 {[#]} g5 $146 ({Predecessor:} 5... Nf6 6. e3 Be7 7. Nf3 O-O 8. Be2 Ne4 9. Nxe4 Bxe4 10. h3 d6 11. Bd3 Bf6 12. Bxe4 fxe4 {½-½ (35) Wojtaszek,R (2728)-Grischuk,A (2764) Hamburg 2019}) 6. Bd2 {A40: Unusual replies to 1 d4.} Qf6 7. h4 g4 8. Bf4 {White is slightly better.} d6 9. e3 Bh6 ({Black should play} 9... Nd7 $11) 10. Nge2 $14 Ne7 11. Nb5 Bxf4 $1 12. Nxf4 Na6 13. Nc3 {Threatening Qa4+.} c6 14. d5 Nc5 15. dxe6 O-O-O 16. Qc2 Kb8 17. O-O-O Nxe6 18. Nce2 Nc5 19. Ng3 d5 20. Be2 d4 21. Ngh5 Qe5 22. exd4 Rxd4 23. Rxd4 Qxd4 24. Rd1 Qe5 25. Nd3 Nxd3+ 26. Qxd3 c5 27. g3 Nc6 28. Qd6+ Qxd6 29. Rxd6 Nd4 30. Nf4 Re8 31. Kd2 Re7 32. Bd3 Nf3+ 33. Kc3 Re1 34. Rd8+ (34. Bxf5 $6 Rc1+ 35. Bc2 Nd4 $11) (34. b4 $16) 34... Kc7 $11 35. Rh8 Rc1+ 36. Kb3 $1 {[%cal Rb3a2]} b5 $36 {[%cal Bb6b5,Bb5c4][%mdl 2080] Black is pushing.} 37. Rxh7+ Kb6 ({Black should try} 37... Kb8 $1 $11 38. Rh8+ (38. cxb5 c4+ {[%mdl 64] Decoy} 39. Bxc4 Nd2+ {[%mdl 64] Double Attack} 40. Ka2 Nxc4 $11) 38... Kc7) 38. Rh6+ ({Better is} 38. cxb5 $14 c4+ {[%mdl 64] Double Attack} 39. Kb4 cxd3 40. Nxd3) 38... Ka5 39. Ka2 (39. cxb5 c4+ 40. Bxc4 Nd2+ 41. Ka2 Nxc4 $17) (39. Rh7 $1 $11 {remains equal.} bxc4+ 40. Bxc4) 39... bxc4 $17 40. Bxf5 {Strongly threatening Rh7.} Nd4 $1 {[%cal Rd4b3] ( -> ...Nb3)} 41. Bb1 (41. Bxg4 $2 {leads to mate.} Nb3 42. Ra6+ Bxa6 43. h5 Ra1#) 41... Rf1 $1 {[%mdl 1024] Black has strong compensation.} 42. Rh5 Kb6 43. Rh6+ (43. a4 $17 {is a better defense.}) 43... Kb5 $19 44. a4+ $2 (44. Rh5 {nothing else works.}) 44... Kb4 45. Rh7 Bc6 (45... Bf3 $19 {has better winning chances. White must now prevent ...Nb3.} 46. Re7 (46. Rxa7 $2 Nb3 $19) 46... Kxa4) 46. Rxa7 $17 Rxf2 47. Ra6 Rh2 48. Bg6 (48. Bh7 $17 {is the only way for White.}) 48... Bf3 $1 $19 49. h5 Rh1 $1 50. Bb1 $2 {[#]} (50. h6) 50... Nb3 $1 {Threatens to win with ...Be4!} 51. Re6 Nc1+ 52. Ka1 Kxa4 53. Re3 $2 (53. h6 Nb3+ 54. Ka2) 53... Kb4 54. Re6 Nd3 55. Ne2 Bxe2 56. Rxe2 Rxh5 {[%mdl 4096] Endgame KRB-KRN} 57. Re4 {Hoping for Bxd3.} Nc1 58. Re8 Rh3 (58... c3 $19 {is more deadly.} 59. bxc3+ Kxc3 60. Re3+ Kd2) 59. Rb8+ $17 Ka5 60. Ra8+ $2 (60. Be4) 60... Kb6 $19 61. Bf5 (61. Ba2 $142 Nxa2 62. Kxa2) 61... Rxg3 62. Rb8+ Kc7 (62... Ka7 $142 63. Rf8 Nb3+ 64. Ka2 Rg1 65. Bb1 g3 66. Rg8 g2 67. Rg6 Nc1+ 68. Ka1 Ne2 69. Ka2 Nf4 70. Rg7+ Ka6 71. Be4 Nd3 72. Rg6+ Kb5 73. b3 Nb4+ 74. Kb2 c3+ {[%mdl 64] Deflection, Decoy, Promotion} 75. Kxc3 Rc1+ 76. Kd2 g1=Q 77. Rxg1 Rxg1 78. Bf3 Rg3 79. Bh5 Nc6 80. Be8 Rxb3 81. Bh5 c4 82. Be8 Kc5 83. Bf7 Nd4 84. Bg6 Rg3 85. Bh7 c3+ 86. Ke1 Rh3 87. Bg6 Rf3 88. Bh5 c2 89. Bxf3 c1=Q+ 90. Bd1 Nf5 91. Ke2 Qe3+ 92. Kf1 Ng3+ 93. Kg2 Ne4 94. Kh1 Qg3 95. Bh5 Nf2#) 63. Rg8 Nb3+ 64. Ka2 {[#]} Rg1 $1 {[%csl Gb3][%cal Rg1a1]} 65. Bb1 g3 {Weighted Error Value: White=0.70/Black=0.32} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Moranda, Wojciech"]
[Black "Gumularz, Szymon"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "2618"]
[BlackElo "2517"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,60,38,27,37,37,46,33,33,32,24,22,27,30,72,56,59,59,81,54,90,86,85,85,120,114,112,106,108,91,90,97,123,128,129,114,133,129,127,137,125,118,140,121,112,134,171,154,274,188,250]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bc5 7. Bf4 {Threatens to win with Nc7+.} O-O {B45: Sicilian Four Knights.} 8. Bc7 Qe7 9. Bd6 $1 {[%cal Rd6e7]} Bxd6 {White is slightly better.} 10. Qxd6 Qd8 $1 {10...Qd8 scores better than 10...Ne8.} 11. O-O-O a6 12. Nd4 $36 {[%mdl 2048] White fights for an advantage.} Ne8 13. Nxc6 bxc6 {[#]} 14. Qc5 $146 ({Predecessor:} 14. Qd4 d5 15. f4 Nd6 16. Bd3 Qa5 17. exd5 cxd5 18. f5 Nb5 19. Bxb5 axb5 20. a3 {1-0 (73) Rasulov,V (2478)-Tilicheev,V (2503) Lichess.org INT 2021}) 14... Rb8 15. h4 Qb6 16. Qxb6 Rxb6 17. a3 d6 18. Rh3 f6 19. Na4 Rb8 20. Rb3 Rxb3 21. cxb3 Kf7 {[#]} 22. Nb6 $1 {[%cal Rb6c8]} Bb7 23. Nd7 Rg8 {[#]} 24. Nc5 $1 {[%cal Rc5b7][%mdl 512]} Bc8 25. Bxa6 Bxa6 26. Nxa6 $16 {KRN-KRN} g5 27. hxg5 Rxg5 28. g3 Rg4 29. Re1 d5 (29... c5 $16 30. b4 cxb4) 30. Nc5 e5 {Weighted Error Value: White=0.07/Black=0.17} (30... dxe4 $142 31. Nxe4 (31. Rxe4 Rxe4 32. Nxe4 Ke7 $16) 31... Ke7) 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Socko, Bartosz"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2618"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,60,10,2,13,0,10,-4,0,0,0,0,0,0,0,0,46,50,41,40,36,33,39,27,81,69,77,47,50,65,59,0,0,0,28,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 Be6 9. Bb3 O-O 10. O-O b5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 11. Qd3 {[#] Recently 11.Re1 got a lot of attention.} Re8 $146 ({Predecessor:} 11... Qc8 12. Nh4 Nbd7 13. a4 b4 14. Nd5 Nxd5 15. exd5 Bg4 16. Nf5 Bxf5 17. Qxf5 g6 18. Qd3 f5 19. f3 a5 20. Rac1 Bf6 21. c3 {½-½ (21) Nisipeanu,L (2674)-Areshchenko,A (2652) Germany 2018}) 12. Nd5 Bxd5 13. Bxd5 ({Don't blunder} 13. exd5 $2 e4 $19) 13... Nxd5 14. Qxd5 Nd7 15. Rfd1 Qc8 16. Qd3 Qc4 17. Qxc4 bxc4 18. Nd2 $36 {[%mdl 2048] White is more active.} Rec8 19. b3 cxb3 20. cxb3 Rc6 (20... a5 $11 {keeps the balance.}) 21. Nc4 f6 22. Rd2 Kf7 23. Rad1 {[%cal Rc4d6]} Ke6 24. f4 (24. Na5 $14 Rc7 25. f3) 24... g6 $11 25. Kf1 h5 26. Ke2 Rf8 {The position is equal.} 27. Na5 Rc7 28. Nc4 {[%cal Rc4d6]} Rc6 $1 29. Na5 Rc7 30. Nc4 {[%cal Rc4d6]} Rc6 $1 {Weighted Error Value: White=0.08/Black=0.07} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Piorun, Kacper"]
[Black "Markowski, Tomasz"]
[Result "0-1"]
[ECO "B09"]
[WhiteElo "2615"]
[BlackElo "2546"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,120,29,58,28,22,33,42,37,55,46,70,38,68,35,41,37,84,83,96,37,52,48,57,16,1,-16,-27,-16,-27,-53,-51,-50,-27,-56,-52,-62,-53,-61,-56,-53,-53,-51,-46,-90,0,0,0,0,0,0,0,0,0,-141,-126,-126,-147,-527,-523,-543,-504,-497,-504,-504,-497,-495,-479,-498,-492,-556,-556,-549,-544,-525,-509,-559,-560,-520,-531,-665,-646,-695,-683,-637,-469,-11505,-11481,-11488,-11369,-6498,-7997,-3614,-2902,-693,-653,-29965,-29967,-29966,-29964,-29955,-29960,-6975,-4926,-647,-564]} 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 O-O 6. Bd3 Na6 7. O-O c5 8. d5 Bg4 9. Kh1 Rb8 10. Bc4 {B09: Pirc Defence: Austrian Attack.} Nc7 11. a4 a6 12. a5 {[#] White is slightly better.} Nd7 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 12... Nb5 13. Qd3 Nxc3 14. bxc3 Bd7 15. Kg1 Bb5 16. Rd1 Qc7 17. h3 Rbe8 18. f5 gxf5 19. exf5 {½-½ (39) Pawnstriker1978 (2568)-WieNie (2604) playchess.com INT 2007}) 13. h3 b5 {[#] ...Bxf3 is the strong threat.} 14. hxg4 {Threatens to win with Be2.} (14. axb6 $5 Nxb6 15. Ba2 $11 (15. hxg4 Nxc4 16. Ra2 Bxc3 $11) (15. Bxa6 $2 Bxf3 16. Qxf3 Ra8 $19)) 14... bxc4 15. g5 Nb5 16. Ne2 Qc7 17. c3 e6 18. f5 (18. Ng3 $16) 18... exf5 $14 ({Much worse is} 18... gxf5 $6 19. exf5 exf5 20. Ng3 $16) 19. exf5 Rfe8 20. f6 Bf8 21. Nd2 Ne5 22. Ra4 Qb7 23. Nf4 Nc7 24. Nxc4 Nxc4 25. Rxc4 Re5 26. Ra4 {[%cal Bc4a4,Ba4a3,Ba3f3,Bf3f7][%mdl 32]} Rxg5 {[%cal Rc7d5]} 27. c4 Rf5 28. Ra3 Rxf6 29. Raf3 Ne8 30. Bd2 Rf5 ({Don't play} 30... Qxb2 $6 31. Bc3 $14) (30... Bg7 $17 31. Bc3 Qd7) 31. g4 $1 $11 {[%cal Rg4f5]} Re5 32. Ne6 $1 Be7 33. Rxf7 {White threatens Rf8+! and mate.} Rxe6 $1 34. Bh6 {Threatening mate with Rf8+!} Rf6 35. R1xf6 (35. Qe2 $11 Qb3 36. R1xf6 Qh3+ 37. Kg1 Nxf6 38. Rxf6) 35... Nxf6 $17 36. Rg7+ Kh8 37. b4 $2 {[%mdl 8192] [#] Now White is beyond hope.} (37. Rf7 $17 {is a better chance.}) 37... Qd7 $1 $19 38. Qe2 Re8 39. bxc5 dxc5 40. Qe5 Qd6 41. Qxd6 Bxd6 42. Ra7 {Black must now prevent Bg7+.} Nxg4 43. Rxa6 Nxh6 44. Rxd6 {[%mdl 4096] Endgame KRN-KR} Ra8 45. a6 Nf7 46. Rc6 Kg7 (46... Ne5 $2 47. Rxc5 Rxa6 48. d6 $17) 47. Kg2 Ne5 48. Rxc5 {If only White now had time for Rc7+....} Rxa6 49. Rc7+ Kf6 50. c5 Nd3 51. Rxh7 (51. Kf3 $142 Ra5 52. c6 Rxd5 53. Rxh7) 51... Nxc5 52. Rc7 Ra2+ 53. Kf3 Ra3+ 54. Kg4 Ra4+ 55. Kf3 Nd3 56. Rc6+ Kf5 57. Ke3 Ne5 58. Rc8 Re4+ 59. Kf2 Rd4 60. Rd8 Ke4 {Weighted Error Value: White=0.38/Black=0.07} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.2"]
[White "Tomczak, Jacek"]
[Black "Heberla, Bartlomiej"]
[Result "0-1"]
[ECO "C26"]
[WhiteElo "2610"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,64,27,40,-16,-11,-8,-16,-31,-39,-90,-99,-92,-72,-161,-98,-110,-101,-90,-88,-129,-92,-99,-89,-87,-96,-141,-133,-142,-141,-146,-137,-126,-117,-280,-62,-164,-14,-29985,-29986,-29986,-29987,-29984,-29980,-29979,-29967,-29965,-29967,-29967,-29968,-29968,-29964,-2975,-5269,-2576,-2500,-2326,-2138]} 1. e4 {Schulz,André} e5 2. Nc3 Nf6 3. g3 c6 4. d4 exd4 5. Qxd4 d5 {[#]} 6. Bh3 $146 {C26: Vienna Game: 2...Nf6, sidelines .} (6. Be3 $14) ({Predecessor:} 6. Nf3 Nbd7 7. exd5 Bc5 8. Qd3 O-O 9. dxc6 Qb6 10. Be3 Bxe3 11. fxe3 bxc6 12. O-O-O {0-1 (31) Lu,S (2615)-Bu,X (2710) Taizhou 2015 CBM 170 [Schulz,André]}) 6... Bxh3 7. Nxh3 Qd7 8. exd5 {The position is equal.} cxd5 9. O-O Nc6 $1 $17 {[%cal Rc6d4]} ({Much weaker is} 9... Qxh3 $6 10. Re1+ (10. Nxd5 $2 Nxd5 11. Qxd5 Nc6 $19) 10... Be7 11. Rxe7+ (11. Nxd5 Nxd5 12. Qxg7 Rf8 $17) 11... Kxe7 12. Qb4+ Kd8 13. Qxb7 $11) 10. Qh4 Be7 11. Bg5 (11. Ng5 $17) 11... O-O-O (11... d4 $1 $19 {[%cal Rd4c3]} 12. Rad1 Ne5) 12. Kg2 d4 13. Ne4 Nxe4 14. Qxe4 Rde8 {aiming for ...Bxg5.} 15. Bxe7 Rxe7 16. Qf4 Rhe8 17. Rfd1 Re5 18. Ng1 g5 19. Qd2 Qd5+ 20. Kf1 g4 $36 {[%mdl 2048] Black is in control.} 21. Qd3 $2 (21. Re1 $17) 21... Qh1 $2 ({Black should try} 21... Nb4 $1 $19 {[%cal Rb4d3]} 22. c4 Qc5) 22. Qxh7 {[#]} ({Better is} 22. c3 $15) 22... f5 (22... R5e6 $1 $19 {Hoping for ...a6.} 23. Qf5 Ne5) 23. Qf7 $2 {[%mdl 8192] [#]} (23. c3 $11) 23... Rh8 $1 24. Re1 Rxh2 {[%csl Gh2][%cal Rh1g2]} 25. Qf8+ Kc7 {[%csl Gh2][%cal Rh1g2]} 26. Qf7+ Kb6 {[%csl Gh2][%cal Rh1g2]} 27. Qb3+ Rb5 28. Qd3 Qg2+ 29. Ke2 Re5+ 30. Kd2 Qxf2+ {Black is clearly winning.} 31. Re2 Rxe2+ 32. Nxe2 Nb4 {Weighted Error Value: White=0.39/Black=0.19} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Krasenkow, Michal"]
[Black "Kempinski, Robert"]
[Result "1/2-1/2"]
[ECO "A64"]
[WhiteElo "2597"]
[BlackElo "2561"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,91,0,0,15,0,8,-15,-9,-50,-35,-39,-64,-54,-47,-58,-43,-43,-38,-31,0,0,0,-11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-3,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O Re8 10. Nd2 a6 11. a4 Nbd7 {[%cal Bb8d7,Bd7e5,Be5d3][%mdl 32]} 12. h3 b6 {A64: Modern Benoni: Fianchetto Variation: 9...Nbd7 10 Nd2 a6 11 a4 Re8.} 13. Nc4 Ne5 14. Na3 Nh5 15. e4 b5 16. axb5 axb5 17. Ncxb5 Ba6 {[#] White must now prevent ...Bxb5.} 18. Nc3 Nd3 19. Qd2 Qb6 {[#]} 20. Bf3 $146 ({Predecessor:} 20. Nc2 Nxb2 21. Rb1 Bxf1 22. Bxb2 Bxg2 23. Kxg2 Rab8 24. Ne3 Qb4 25. Ned1 Qc4 26. Rc1 {0-1 (37) Justo,D (2325)-Hamdouchi,H (2585) Drancy 2016}) 20... Rab8 21. Be2 {The position is equal.} Nxc1 22. Raxc1 Bxc3 23. bxc3 Nf6 24. f3 Bxe2 25. Qxe2 Nxd5 $1 26. Nc4 Qa6 {[#] And now ...Nb6 would win.} 27. Rfe1 Nf6 28. Ra1 Qc6 29. Rad1 d5 30. exd5 Nxd5 31. Qd3 {Rxe8+ is the strong threat.} Nf6 32. Ne5 Qe6 33. g4 {White wants to play Nxg6.} Rb2 34. f4 Qa2 {( -> ...Rg2+)} 35. Qf3 Rd2 36. Rxd2 Qxd2 37. Re2 Qd5 {aiming for ...Qxf3.} 38. Kf2 h6 39. h4 (39. Kg2 {keeps more tension.} c4 40. Kg3 Qd1 41. Kf2 Qd5 42. Kg3) 39... c4 40. g5 hxg5 41. hxg5 Qc5+ 42. Kf1 Nh5 43. Nd7 Qc8 44. Qg4 Ng3+ 45. Qxg3 {Qh3 would kill now.} Qxd7 46. Rxe8+ {Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Dziuba, Marcin"]
[Black "Gajewski, Grzegorz"]
[Result "0-1"]
[ECO "A06"]
[WhiteElo "2583"]
[BlackElo "2596"]
[Annotator "TA"]
[PlyCount "104"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,104,13,17,22,29,16,26,22,20,7,16,27,37,43,84,36,31,36,37,37,38,35,27,0,0,0,10,19,19,16,16,28,26,15,19,20,86,31,37,5,5,5,17,0,0,0,0,0,0,-114,-106,-106,-114,-158,-163,-214,-219,-228,-223,-223,-154,-137,-136,-140,-112,-132,-122,-177,-89,-84,-64,-87,-82,-130,-108,-127,-98,-143,-154,-128,-82,-96,-91,-91,-91,-100,-93,-94,-55,-64,-57,-79,-88,-1033,-1033]} 1. Nf3 d5 2. e3 Nf6 3. b3 c5 4. Bb2 Nc6 5. Bb5 Bd7 6. O-O e6 7. d4 {A06: Réti Opening: 1 Nf3 d5.} a6 8. Bd3 b5 9. dxc5 {White has an edge.} Bxc5 {[#]} 10. Nbd2 $146 ({Predecessor:} 10. Ne5 Qc7 11. Nxd7 Qxd7 12. a3 e5 13. c4 bxc4 14. bxc4 dxc4 15. Bxc4 Qc7 16. Qf3 {½-½ (23) Brandt,M (1639)-Amann,P (1643) Cologne 2004}) 10... O-O 11. c4 dxc4 12. bxc4 b4 13. Ng5 {Threatens to win with Bxf6.} e5 14. Nde4 Nxe4 15. Bxe4 h6 16. Nf3 Rc8 17. Qc2 f6 18. Rfd1 Qe8 19. a3 Be6 20. axb4 Nxb4 21. Qb1 f5 22. Bc2 e4 23. Ne5 Rb8 (23... Qh5 $11) 24. Qc1 (24. Ba4 $16 Qh5 25. Bd7 Bxd7 26. Nxd7 (26. Rxd7 Qe2 $11)) 24... f4 25. Bxe4 fxe3 26. fxe3 Bf5 27. Bxf5 Rxf5 28. Qc3 Rb7 {[%cal Bb8b7,Bb7e7,Be7e4][%mdl 32]} 29. Kh1 Re7 30. Ng4 (30. Nd3 $11 {keeps the balance.} a5 31. Nxc5 (31. Rxa5 Qf8 $14) 31... Rxc5 32. Rd4) 30... Qg6 $1 $17 {[%cal Rg6g4]} 31. h3 h5 $1 {[%cal Rh5g4]} 32. e4 Rxe4 33. Rd7 (33. Rd8+ $142 Kh7 34. Rd7 $1) 33... Bf8 $1 $19 34. Ne3 {[#]} Rf2 35. Rg1 {[%cal Ba1g1,Bg1g2,Bg2f2][%mdl 32]} Na2 36. Qb3 {[#] Nd1 is the strong threat.} Qe6 $1 37. Nd1 {[#]} Rxg2 {[%mdl 512]} 38. Rxg2 (38. Kxg2 Re2+) 38... Qxd7 39. c5+ {[#]} (39. Qf3 $17 {was necessary.} Re1+ 40. Rg1 Rxg1+ 41. Kxg1) 39... Qf7 (39... Kh7 $1 $19 {White must now prevent ...Re1+.} 40. Kh2 Qc7+ 41. Qg3 Qxg3+ 42. Kxg3 Nb4) 40. Qxf7+ $17 Kxf7 41. Rf2+ Kg8 42. Kg2 Bxc5 43. Rf5 Bf8 44. Kf3 Re1 45. Ne3 h4 46. Rh5 Rb1 47. Bd4 Nb4 48. Rxh4 a5 {aiming for ...a4.} 49. Rg4 Nc6 50. Bc3 Rc1 51. Rc4 {[#]} Bb4 $1 {[%mdl 64] Overworked Piece} 52. Bxb4 {[%mdl 8192]} (52. Bb2 $17 Rxc4 53. Nxc4) 52... Ne5+ {[%mdl 64] Double Attack.  Weighted Error Value: White=0.33/Black=0.11} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Heberla, Bartlomiej"]
[Black "Tomczak, Jacek"]
[Result "1/2-1/2"]
[ECO "A34"]
[WhiteElo "2556"]
[BlackElo "2610"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,112,9,0,75,70,75,74,80,70,132,87,80,68,68,67,69,68,68,70,73,65,71,33,32,14,16,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-10,-10,-10,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-2,0,0,0,0,0,0,0,0,0,-8,0,0,0,-8,0,-8,-8,-8,-8,-8,0,-8,0,0,0]} 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bb5+ N8c6 7. d4 cxd4 8. a3 dxc3 9. Qxd8+ Kxd8 10. axb4 g6 {A34: Symmetrical English: 2 Nc3, lines with ...d5.} (10... Nxb4 11. O-O $14) (10... cxb2 $11 11. Bxb2 f6) 11. bxc3 $16 Bg7 12. Ra3 Bd7 {Threatening ...Nxb4.White is better.} 13. O-O {[#]} Kc8 $146 (13... a6 $14) ({Predecessor:} 13... Rc8 14. Rd1 Ke8 15. Rxa7 Nxa7 16. Bxd7+ Kd8 17. Be3 Kc7 18. Bf4+ Kb6 19. Bxc8 Nxc8 {1-0 (55) Csom,I (2510)-Stean,M Las Palmas 1978}) 14. Be3 Ne5 15. Bxd7+ Kxd7 16. Rd1+ Kc8 $1 17. Nxe5 ({Don't play} 17. Bxa7 $6 Nc6 $11) 17... Bxe5 18. Rxa7 Rxa7 19. Bxa7 $14 {[%mdl 4096] Endgame KRB-KRB} Kc7 20. Be3 Ra8 21. c4 Ra4 {The position is equal.} 22. Rb1 Bc3 23. b5 e5 24. Kf1 Bd4 25. Bxd4 exd4 $11 {KR-KR} 26. c5 Rc4 27. c6 bxc6 28. bxc6 Kxc6 29. Ke2 Rc2+ 30. Kd3 Rxf2 31. Kxd4 Kd6 {aiming for ...Rd2+.} 32. e5+ Kc6 33. g3 Rd2+ 34. Ke4 Re2+ 35. Kd4 Rd2+ (35... Rxh2 {looks sharper.} 36. Rf1 Rd2+ 37. Ke4 Rd7 38. g4 Rb7) 36. Ke4 Re2+ (36... Rxh2 {feels hotter.} 37. Rf1 Re2+ 38. Kd4 Rd2+ 39. Ke4 Rd7) 37. Kd4 Rxh2 38. Rf1 Rd2+ 39. Ke4 Rd7 40. Rc1+ Kb7 41. g4 Rc7 42. Rh1 Kc6 43. Kd4 Rd7+ 44. Kc4 Kc7 45. Rxh7 Kd8 46. e6 fxe6 47. Rh6 Ke7 {White must now prevent ...Kf6.} 48. Rxg6 Rd1 49. g5 Kd6 50. Rg8 {[#] White threatens Rd8+ and mate.} Ke5 51. g6 Kf6 52. Kc3 Rd7 53. Kc2 Ke5 54. Kc3 Ke4 55. g7 e5 56. Kc4 Ke3 {Weighted Error Value: White=0.04/Black=0.06} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.2"]
[White "Teclaf, Pawel"]
[Black "Bartel, Mateusz"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2502"]
[BlackElo "2635"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,87,6,16,16,17,20,11,16,16,-3,24,17,31,15,40,38,37,43,51,42,65,42,52,23,34,14,3,0,0,-12,0,0,0,-16,0,-3,0,0,8,5,39,31,50,33,33,16,28,20,49,47,56,49,54,56,54,63,64,60,63,52,108,100,98,94,167,167,169,164,304,308,326,305,368,360,579,540,578,473]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Be7 7. a3 {A28: English Opening: Four Knights Variation.} d6 8. Bd3 h6 9. b4 {The position is equal.} Be6 10. Nxe7+ Nxe7 11. Bb2 {[#]} Qd7 $146 ({Predecessor:} 11... a5 12. O-O Qd7 13. Ne1 axb4 14. axb4 Rxa1 15. Bxa1 Bf5 16. f4 Bxd3 17. Nxd3 e4 {0-1 (45) Josse,M (2235)-Doluhanova,E (2229) chess.com INT 2020}) 12. Be2 Bf5 13. d3 b6 14. O-O c5 15. Nd2 Bh7 16. Bc3 Qe6 17. Rae1 d5 18. bxc5 dxc4 19. cxb6 cxd3 20. Bxd3 Bxd3 21. Qxd3 axb6 22. Qb5 Ned5 23. Bb2 Ra5 24. Qb3 Rc5 25. Nf3 e4 26. Nd4 $36 {[%mdl 2048] White fights for an advantage.} Qe5 27. Ne2 Qe6 28. Bd4 Rc6 29. Qb2 Rfc8 30. Rc1 Ne8 31. Rxc6 Rxc6 32. h3 f6 33. Rc1 Kf7 34. Rxc6 Qxc6 35. Qb3 Ke7 ({Better is} 35... Kf8 $14) 36. Nc3 $16 Nxc3 37. Bxc3 ({Much worse is} 37. Qxc3 $6 Qxc3 38. Bxc3 Nc7 $11) 37... Qe6 {[#]} (37... Kd7 $16) 38. Qb4+ $1 $18 Kd7 39. Bd4 Kc7 {[#]} (39... Qd6 {might work better.}) 40. Bxb6+ $1 {[%mdl 512]} Kd7 (40... Kb7 41. Bc5+) 41. a4 {[%cal Ba3a4,Ba4a5][%mdl 32]} Nd6 42. Bc5 Nc4 $2 (42... Ne8 {was called for.} 43. Bf8 Kc8) 43. Qb7+ Ke8 44. a5 {Weighted Error Value: White=0.04/Black=0.23} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.3"]
[White "Socko, Bartosz"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2618"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,71,16,10,12,19,-2,0,14,14,11,15,21,19,20,20,20,10,23,22,22,26,26,16,11,32,18,15,11,-8,21,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-24]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 Be6 9. Bb3 O-O 10. O-O b5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 11. a4 {Black must now prevent Bxe6. 11.Re1 is the modern continuation.} b4 12. Nd5 Bxd5 (12... Nbd7 {is more complex.} 13. Nxb4 Nxe4 14. a5 Qb8 15. Nd5 Bd8) 13. Bxd5 Nxd5 14. Qxd5 Nd7 15. Qd3 Qc7 16. Nd2 Rfc8 17. Rfc1 Nc5 18. Bxc5 Qxc5 19. c4 bxc3 20. Rxc3 Qd4 21. Qxd4 exd4 {[#]} 22. Rc4 $146 {The position is equal.} ({Predecessor:} 22. Rd3 Rc2 23. Rb1 Rb8 24. b3 Bg5 25. Nf3 Rc3 26. Rbd1 Bf6 27. Nxd4 Rxd3 28. Rxd3 Bxd4 29. Rxd4 Rxb3 {1-0 (54) Korneev,O (2530)-Drygalov,S (2485) Sochi 2019}) 22... Rab8 23. g3 d3 24. Rxc8+ Rxc8 $11 {[%mdl 4096] Endgame KRB-KRN} 25. Ra3 Rc2 26. Rxd3 Rxb2 27. Nc4 Rb4 28. Nxd6 Rxa4 29. e5 g6 30. f4 Rb4 31. Kg2 a5 32. Rd5 a4 33. Ra5 Bxd6 34. exd6 Rd4 35. Kf3 Rxd6 36. Ke4 {A rather calm draw.  Weighted Error Value: White=0.02/Black=0.02} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.3"]
[White "Piorun, Kacper"]
[Black "Markowski, Tomasz"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2615"]
[BlackElo "2546"]
[Annotator "TA"]
[PlyCount "144"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,144,22,27,41,0,3,0,-6,-25,27,41,25,10,12,13,21,12,8,8,26,15,10,24,32,22,31,14,16,4,20,0,0,0,0,0,22,16,14,19,142,149,134,117,121,102,85,32,75,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,56,0,0,0,0,0,0,0,72,19,15,0,0,0,0,0,3,0,0,0,25,25,25,27,121,125,155,168,162,154,153,147,201,87,452,450,386,360,360,360,360,346,346,0,346,346,346,346,346,179,7104,6022,29967,29968,29967,29968,29972,29968,29975,29976,29988]} 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bc4 Nf6 5. Qe2 O-O 6. e5 dxe5 7. dxe5 Nd5 8. h3 c6 9. O-O Be6 {now scores much better than the old 9...Qc7. B04: Alekhine's Defence: 4 Nf3.} 10. Rd1 $5 {[%mdl 4] A promising side line.} Nd7 11. Bb3 Qc7 {The position is equal.} 12. c4 N5b6 ({Black should play} 12... Nb4 $1) 13. Bf4 $11 {[#]} a5 $146 ({Predecessor:} 13... Nc5 14. Qe3 Nbd7 15. Bc2 Qb6 16. b3 a5 17. a3 a4 18. b4 Nb3 19. c5 Qa7 20. Bxb3 axb3 {½-½ (63) Ayza Leon,D (2215)-Gual Pascual,A (2397) Barcelona 2016}) 14. Nbd2 Rfd8 15. Bc2 a4 16. Qe3 Nf8 $1 17. b3 axb3 18. axb3 Rxa1 19. Rxa1 Ra8 20. Re1 Nbd7 21. Bg5 Ra2 22. Bb1 Ra1 23. Bxe7 {Hoping for Bd6.} Nxe5 $1 24. Bb4 {[%cal Rf3e5]} Nxf3+ 25. Nxf3 b6 26. Bc3 Bxc3 27. Qxc3 Qa7 {[#]} (27... Ra7 $11) 28. Nd4 $1 $16 {[%cal Rd4c6]} Bd7 29. Nc2 Ra5 {[#]} 30. b4 $1 {[%cal Rb4a5]} Ra4 31. h4 (31. Qf6 $16 {Black must now prevent Re7!} Be6 32. Nd4) 31... h5 $14 32. Re7 (32. Qf6 $16 {And now Re7! would win.} Qb8 33. Nd4 (33. Re7 Be6 $11)) 32... Qb8 $1 $11 33. Qf6 Be6 34. Ne3 $1 {Strongly threatening Bxg6!} Ra7 35. Rxa7 Qxa7 36. Be4 Qa4 37. Qc3 Nd7 38. g3 c5 39. bxc5 Nxc5 40. Bd5 Qa5 41. Qf6 Qe1+ $1 42. Kg2 Qb1 ({Black should try} 42... Bxd5+ $11 43. cxd5 Qb4) 43. Qe5 (43. Kh2 $14) 43... Nd7 44. Qd4 {aiming for Bxe6.} Nc5 45. Qe5 Nd7 46. Qf4 Nf8 (46... Bxd5+ $11 {remains equal.} 47. Nxd5 (47. cxd5 b5 $11) 47... Qd3) 47. Qd4 (47. Bxe6 $16 fxe6 48. Qd6) 47... Qb4 $1 48. Qf6 $40 {[%mdl 128] White attacks.} Nd7 49. Qd8+ Qf8 50. Qc7 Qc5 51. Qa7 {Bxe6 is the strong threat.} Nf8 52. Qb8 (52. Bxe6 {is interesting.} Nxe6 53. Qd7 Kg7 54. Qd3 Nd4 55. Nd5) 52... Qd4 53. Bxe6 Qe4+ 54. Kf1 Qxe6 (54... Qb1+ $1 $11 55. Kg2 Qe4+ 56. Kf1 Qb1+ 57. Ke2 fxe6) 55. Nd5 $16 Qh3+ 56. Kg1 Qe6 57. Qxb6 Qxb6 58. Nxb6 $18 {[%mdl 4096] Endgame KN-KN} Ne6 (58... Kg7 $16 {might work better.} 59. Nd5 Ne6) 59. Nd7 (59. Kf1 $18 {and White stays clearly on top.}) 59... f5 $2 {[%mdl 8192]} (59... Kg7 $16 {is a better chance.}) 60. Ne5 Kg7 61. Nd3 Kf6 62. Kg2 Nd4 63. Nf4 Nc6 64. Nd3 Nd4 $1 65. f3 g5 66. hxg5+ Kxg5 67. Kf2 (67. c5 $142) 67... h4 $2 (67... Nc2 68. c5 Nd4) 68. gxh4+ Kxh4 69. Ke3 {White mates.} Ne6 70. c5 Kg3 71. c6 f4+ 72. Ke4 Ng5+ {Weighted Error Value: White=0.09/Black=0.28} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.3"]
[White "Gumularz, Szymon"]
[Black "Moranda, Wojciech"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2517"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,94,0,7,0,0,0,0,0,0,-1,5,-12,-3,-2,0,-10,0,-66,-65,-49,-17,-10,1,0,15,0,36,-34,-6,-6,-7,-25,-18,-16,-16,-16,-20,-10,-6,-10,0,-137,0,-42,-45,-13,48,-52,-17,-85,-47,-34,7,-499,-518,-697,-693,-639,-381,-433,-418,-419,-383,-569,-570,-637,-636,-631,-628,-581,-587,-573,-553]} 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. b3 Be7 7. Bb2 O-O 8. e3 d5 9. Qe2 dxc4 10. bxc4 Qc8 11. d3 Rd8 12. Nc3 Nc6 13. Rad1 {A14: English Opening: 1...e6 with b3 by White.} a6 {[#]} 14. Rd2 $146 ({Predecessor:} 14. Ba1 Rb8 15. Rb1 Ba8 16. Ne1 Qc7 17. f4 Na7 18. g4 Bxg2 19. Nxg2 b5 20. g5 Ne8 {0-1 (57) Shen,C (2354)-Balakrishnan,P (2485) Lichess.org INT 2020}) 14... Rb8 15. Rb1 {The position is equal.} Ba8 16. Ba1 Na7 17. d4 cxd4 18. exd4 b5 {[%cal Bb6b5,Bb5b4][%mdl 32]} 19. c5 Bc6 20. Bh3 (20. Rc1 $11) 20... b4 $15 21. Nd1 Bb5 (21... Ne4 $5 {[%cal Re4d2]} 22. Rd3 f5 $15) 22. Qe1 Nc6 23. Ne3 {Threatening d5!} Qc7 24. Rc1 a5 25. Nc4 (25. Ng5 $1 $14) 25... Bxc4 26. Rxc4 Nd5 27. Qd1 Bf6 28. Bg2 Na7 29. Ne5 Nb5 30. Ng4 Bg5 31. f4 Be7 32. Qf3 (32. Bxd5 $11 Rxd5 33. Bb2) 32... Nbc3 (32... Ndc3 $1 $17 33. Kf1 Bxc5 $1 34. Nh6+ (34. Rxc5 $2 Qxc5 35. dxc5 Rxd2 $19) (34. Bxc3 $2 bxc3 35. Rd1 c2 $19 {[%mdl 64] Decoy}) 34... gxh6 35. Qg4+ Kh8) 33. f5 Bg5 $36 {[%mdl 2048] Black fights for an advantage.} 34. Rd3 $1 Re8 (34... Nxa2 $6 35. fxe6 fxe6 36. h4 $14) (34... Qc8 $11 35. fxe6 fxe6) 35. fxe6 (35. h4 $14 Bd8 36. Ne3) 35... fxe6 ({But not} 35... Rxe6 $6 36. Bxc3 Nxc3 37. d5 $14) 36. Ne5 (36. Bxc3 $11 bxc3 37. h4) 36... Bf6 37. Ng4 {[%cal Ra1c3]} Rf8 {Hoping for ...Bxd4+!} 38. Nxf6+ {[%mdl 8192] Now White is beyond hope.} (38. Bxc3 $11 {and White stays safe.} bxc3 39. Nxf6+ Rxf6 40. Qd1) 38... Rxf6 $19 39. Qg4 {[%cal Ra1c3]} Qf7 40. Rf3 Rf8 {Threatens to win with ...Ne3!} 41. Bxc3 {[#] And now Rxf6 would win.} Ne3 $1 {[%mdl 512]} 42. Rxf6 (42. Rxe3 $2 {[#] gets mated.} Rf1+ $1 {[%mdl 512]} 43. Bxf1 Qxf1#) 42... Qxf6 (42... Nxg4 $2 {is the wrong capture.} 43. Rxf7 Kxf7 44. Bd2 $18) 43. Qe2 (43. Qf4 $142 Qxf4 44. gxf4 Nxc4 45. Be1) 43... Nxc4 {Black is clearly winning.} 44. Ba1 {[#]} Qh6 {( -> ...Qc1+)} 45. h4 Qe3+ 46. Qxe3 Nxe3 47. Bh3 Kf7 {Weighted Error Value: White=0.50/Black=0.23} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.3"]
[White "Janik, Igor"]
[Black "Wojtaszek, Radoslaw"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "2495"]
[BlackElo "2694"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,94,4,10,5,14,10,17,0,47,33,38,47,50,9,47,35,145,39,45,13,7,0,0,0,0,-123,-139,-123,-127,-133,-116,-124,-106,-96,-44,-41,-54,-53,-53,-50,-33,-51,-55,-53,-41,-21,-37,-43,-34,-40,-33,-38,0,-145,-150,-320,-308,-320,-344,-314,-289,-346,-363,-331,-359,-312,-236,-187,-16,-16,-16,-1119,-1119,-1990,-1029,-973,-937]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Nc3 d5 8. cxd5 exd5 9. Bg2 O-O 10. O-O Re8 11. Ne5 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} Bb7 12. Rc1 Nbd7 {[%cal Bb8d7,Bd7f8,Bf8e6][%mdl 32]} 13. Bg5 {The position is equal.} Nf8 14. e3 Ne6 15. Bxf6 Bxf6 16. f4 c6 17. b4 Qd6 (17... Bxe5 $14 18. fxe5 Qg5) 18. Qb3 {[#]} ({Not} 18. Qh5 g6 $15) (18. b5 $16) 18... b5 $146 ({Predecessor:} 18... Nc7 19. Rc2 Be7 20. a3 a5 21. bxa5 b5 22. a4 Rxa5 23. Rfc1 Qa3 24. Qb1 Qd6 25. axb5 cxb5 {1-0 (34) Nakamura,H (2736)-Martirosyan,H (2622) Chess.com INT 2020}) 19. a3 a5 20. bxa5 Rxa5 21. a4 {[%cal Ra4b5]} b4 22. Rb1 Ba6 $17 23. Qxb4 Qxb4 24. Rxb4 Bxf1 25. Bxf1 c5 26. Rb5 Rea8 ({Black should try} 26... Rxb5 $17 27. Bxb5 Rd8) 27. Rxa5 Rxa5 28. Nc6 Ra8 {[%cal Rc5d4]} ({But not} 28... cxd4 29. Nxa5 dxc3 30. Nb3 $11) 29. Nxd5 Rxa4 {[%cal Rc5d4]} 30. Nxf6+ gxf6 $15 {[%mdl 4096] Endgame KRN-KBN} 31. d5 Nf8 32. Bb5 Ra2 33. Ne7+ Kh8 34. Nf5 Rb2 35. Nd6 Kg7 36. Bd3 {[#]} (36. Ne8+ $11 Kh8 37. Nd6) 36... Nd7 $1 $17 37. Bf5 $2 (37. Nc8 $17) 37... Nb6 $19 38. Ne8+ Kf8 39. Nxf6 c4 40. d6 c3 41. Nxh7+ Kg7 {And now ...f6 would win.} 42. Ng5 Rd2 {...Nd5 is the strong threat.} 43. Nf3 {[#]} Rxd6 ({Better is} 43... c2 $1 $19 {[%mdl 512]} 44. Bxc2 Rxc2) 44. Nd4 $11 Nd5 45. Nc2 {[%mdl 8192]} (45. Kf2 $11) 45... Ne7 $19 {Black is clearly winning.} 46. Be4 f5 47. Bf3 Rd2 {Weighted Error Value: White=0.57/Black=0.33} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.4"]
[White "Wojtaszek, Radoslaw"]
[Black "Janik, Igor"]
[Result "1-0"]
[ECO "A50"]
[WhiteElo "2694"]
[BlackElo "2495"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,77,54,69,36,35,29,35,41,41,39,48,26,26,26,41,37,370,85,135,135,189,188,198,172,215,204,222,210,213,228,379,372,368,354,325,350,331,281,267,189,196,193,179,179,152,163,179,164,180,167,174,177,298,204,273,276,284,284,255,224,1078,517,1112,666,29965,29963,29976,29977,29987,762]} 1. d4 Nf6 2. c4 b6 3. f3 Nc6 4. Nc3 e6 5. e4 e5 {[#]} 6. Nge2 $146 {A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6).} ({Predecessor:} 6. dxe5 Nxe5 7. f4 Ng6 8. e5 Ng8 9. Nf3 d6 10. Bd3 dxe5 11. f5 N6e7 12. Nxe5 {1-0 (30) Sarkar,J (2374)-Oberoi,S (2133) Chess.com INT 2020}) 6... exd4 7. Nxd4 Nxd4 8. Qxd4 {White is slightly better.} Bc5 9. Qe5+ Be7 10. Be2 O-O 11. Be3 Re8 {And now ...Nxe4! would win.} 12. Qd4 Nh5 $2 {[%mdl 8192]} (12... Bb4 $14) 13. Qd2 $2 (13. Qd5 $18 {and the rest is easy.} Bh4+ 14. g3) 13... Bb7 14. O-O-O d6 (14... g6 $16 15. Qxd7 Qxd7 16. Rxd7 Bd6) 15. g4 $1 $18 {[%cal Rg4h5]} Nf6 16. h4 a6 17. g5 Nd7 18. h5 b5 19. g6 Ne5 $2 (19... Bf6 20. cxb5 axb5 21. Bxb5 Kh8) 20. f4 Nxc4 21. Bxc4 bxc4 22. gxf7+ Kxf7 23. h6 g6 24. Qd4 Bf6 25. Qxc4+ Kf8 26. Bd4 Qe7 27. Rhf1 {Black must now prevent e5.} Qf7 28. Qd3 {aiming for e5!} a5 {next ...Ba6 is good for Black.} 29. Bxf6 Qxf6 30. e5 $1 {[%cal Re5f6]} Qf7 (30... Qh4 $142) 31. Qd4 ({Weaker is} 31. exd6 Ba6 $16) 31... Rad8 {[#]} 32. f5 $1 {[%cal Rf5g6]} (32. exd6 Rxd6 33. Qc5 (33. Qh8+ Qg8 $11) 33... Kg8 $14) 32... gxf5 33. exd6 Rxd6 {[#]} 34. Qc5 $40 {[%mdl 192] Double Attack. White attacks with force.} Ree6 $2 (34... Kg8 35. Rxf5 Qe7 36. Rxd6 Qxd6 37. Rg5+ Kh8 38. Qxd6 cxd6 39. Rxa5 Kg8) 35. Nb5 (35. Rxf5 $142 Rf6 36. Rdf1) 35... Qg6 (35... Ke8 $142 36. Nxd6+ cxd6 37. Qb5+ (37. Rxd6 Rxd6 38. Qxd6 Qc4+ {[%mdl 64] Double Attack} 39. Kd2 Qxf1 $11) (37. Qxa5 Be4 $16) 37... Qd7 38. Rxf5 Qxb5 39. Rxb5 Bf3) 36. Nxd6 Qxh6+ 37. Kb1 {White mates.} cxd6 38. Qxf5+ Ke7 39. Qf7+ {Weighted Error Value: White=0.41/Black=0.69} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.4"]
[White "Gajewski, Grzegorz"]
[Black "Dziuba, Marcin"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2596"]
[BlackElo "2583"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,96,9,10,20,24,24,23,23,12,18,21,0,47,31,43,12,55,54,47,41,89,64,88,94,168,154,140,0,102,77,80,62,81,70,62,105,63,65,48,0,457,449,425,169,171,116,118,112,126,115,182,175,183,144,247,222,216,222,314,283,314,312,304,302,338,194,474,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. Nbd2 Bg4 6. c3 e6 7. Qb3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Qc8 8. Nh4 Be7 9. h3 {White has an edge.} Bh5 10. g4 Bg6 11. dxc5 {[#]} Bxc5 $146 ({Predecessor:} 11... Nd7 12. Nxg6 hxg6 13. Qc2 Nxc5 14. Bg2 Qd7 15. Nb3 Rc8 16. Nxc5 Bxc5 17. Qe2 Bd6 {0-1 (44) Demchenko,A (2641)-Quesada Perez,Y (2598) Lichess.org INT 2020}) 12. Nxg6 hxg6 13. g5 Ng8 14. O-O-O Nge7 15. h4 a6 16. Be2 e5 17. Bg3 Qf5 (17... Qc7 $16) 18. e4 $18 dxe4 19. Qc4 (19. Qxb7 $6 O-O $11) (19. Qc2 $1 $16) 19... Bxf2 (19... Bd4 $1 $11 {remains equal.}) 20. Nxe4 Be3+ 21. Kb1 {[%mdl 1024] Threatens to win with Qd3. White has strong compensation.} O-O $1 22. Bd3 $36 {[%mdl 2048] Strongly threatening Nf6+! White has good play.} b5 23. Qb3 Qg4 24. h5 Rad8 $1 {[%cal Rd8d3]} 25. Qc2 gxh5 $2 {[%mdl 8192]} (25... Rxd3 $1 $11 26. Qxd3 Rd8 $1) 26. Rh4 $1 {[%cal Rh4g4]} Qe6 {Black wants to play ...g6.} (26... Qf3 27. Rf1 $18) 27. Qe2 $2 (27. Rxh5 Rfe8 28. Rdh1) 27... Ng6 28. Qxe3 ({Much less strong is} 28. Qxh5 $6 Rfe8 $14) ({Better is} 28. Rhh1 $18) 28... Nxh4 $16 29. Bxh4 Qg4 30. Rh1 Ne7 (30... Rxd3 $16 {might work better.} 31. Qxd3 Rd8) 31. Bc2 $1 $18 Ng6 32. Bf2 h4 (32... Nf4 $16 33. Ng3 Ng2) 33. Rg1 Qh5 34. Qh3 $1 a5 (34... Nf4 {was necessary.} 35. Qxh4 Qxh4 36. Bxh4 Rd7) 35. a3 b4 36. axb4 axb4 37. cxb4 Qe2 38. Bxh4 (38. Bc5 $142) 38... Rd4 $2 {[#]} (38... Ra8 39. Bd3 Qh5) 39. Qf5 $2 Rxb4 {White must now prevent ...Rfb8.The position is equal.} 40. Be1 $1 {[%cal Re1b4]} Rxb2+ 41. Kxb2 Rb8+ 42. Ka3 {Rf1 is the strong threat.} Qe3+ 43. Bc3 Qxg1 44. Bb3 $1 {[%cal Rb3f7]} Qc1+ 45. Ka4 Ra8+ 46. Kb5 Rb8+ 47. Ka4 Ra8+ 48. Kb5 Rb8+ {Black defended with fortune.  Weighted Error Value: White=0.32/Black=0.34} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.4"]
[White "Markowski, Tomasz"]
[Black "Piorun, Kacper"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2546"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,114,-5,0,0,0,-25,-15,-15,-10,-30,-5,0,20,20,20,13,18,0,18,-5,9,19,0,1,39,35,41,33,76,68,110,58,72,18,104,105,89,115,102,118,100,66,113,0,0,0,0,0,0,0,-7,-10,0,-19,0,0,-12,-47,0,0,0,-18,0,0,0,-22,0,0,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8]} 1. c4 e5 2. e3 Nf6 3. a3 g6 4. b4 Bg7 5. Bb2 d6 6. d3 {A20: English Opening: 1...e5.} O-O 7. Nd2 a5 8. Ngf3 Re8 9. Qc2 Nc6 10. b5 Ne7 {[#]} 11. Be2 $146 ({Predecessor:} 11. a4 h6 12. Be2 Kh7 13. O-O Nd7 14. Ne4 Ng8 15. c5 f5 16. c6 bxc6 17. Qxc6 fxe4 18. Qxa8 exf3 19. Bxf3 {1-0 (25) Jaime Montalvan,L (2167)-Serrano Garcia,L (1866) Marbella 2019}) 11... b6 12. O-O Bb7 13. e4 Nd7 14. Rfe1 Nc5 15. d4 exd4 16. Nxd4 Kh8 17. f4 Ng8 {[%cal Rb7e4]} 18. Bf3 $1 Re7 19. Re2 Qf8 20. Rae1 ({Better is} 20. e5 $16) 20... Rae8 $14 21. g3 (21. e5 $16) 21... Ne6 (21... Ba8 $11) 22. Nxe6 $16 Rxe6 23. e5 Bxf3 24. Nxf3 dxe5 25. Nxe5 Bxe5 26. Bxe5+ (26. Rxe5 $16 Rxe5 27. c5 (27. Bxe5+ f6 $17) (27. fxe5 Qc5+ 28. Qf2 Qxf2+ 29. Kxf2 Kg7 $16) (27. Rxe5 f6 $11)) 26... f6 $11 27. Bb2 Qd6 28. Kg2 Kg7 29. Kf3 Rxe2 30. Rxe2 Rxe2 31. Qxe2 Ne7 32. g4 Kf7 33. Qc2 Qd7 (33... a4 $5) 34. h3 {The position is equal.} h5 35. Kg3 hxg4 36. hxg4 Qe6 37. Qc3 c6 38. a4 cxb5 39. axb5 Nc8 {White should prevent ...Nd6.} 40. g5 Nd6 {[#] ...Ne4+ is the strong threat.} 41. Qxf6+ Qxf6 42. Bxf6 Nxc4 {[%mdl 4096] Endgame KB-KN} 43. Kf3 Nd6 44. Bd4 Nxb5 45. Bxb6 a4 {[#] Threatens to win with ...a3.} 46. Be3 a3 {And now ...a2 would win.} 47. Bc1 $1 a2 48. Bb2 Ke6 (48... Na3 $5 49. Ke4 $8 Nc4 $11) 49. Ke4 Nd6+ (49... Nc7 {seems wilder.} 50. Kd4 Nd5 51. Kc4 Nxf4 52. Kb3 Nd3) 50. Kd3 Kf5 51. Kc2 Kxf4 52. Bc1+ Kf5 53. Kb2 Ne4 54. Kxa2 Nxg5 55. Kb3 Nh3 56. Bh6 g5 57. Bxg5 Nxg5 {Weighted Error Value: White=0.10/Black=0.10} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.4"]
[White "Sadzikowski, Daniel"]
[Black "Socko, Bartosz"]
[Result "1/2-1/2"]
[ECO "B63"]
[WhiteElo "2527"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,63,49,49,77,17,98,39,45,52,42,20,31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,14,0,0,0,0,0,14,14,21,12,32,32,32,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O Nxd4 9. Qxd4 O-O 10. h4 Qa5 11. Kb1 Bd7 {B63: Sicilian: Richter-Rauzer: 7...Be7 and unusual Black 7th moves.} 12. f3 ({Better is} 12. Qd2 $16) 12... Rfd8 {[#]} (12... b5 $11 {remains equal.}) 13. Bd2 {[#]} (13. Qd2 $1 $16) 13... Qc5 $146 ({Predecessor:} 13... Qe5 14. Qxe5 dxe5 15. g4 Bc5 16. Bb5 Bxb5 17. Nxb5 a6 18. Nc3 h5 19. g5 Nh7 {0-1 (46) Chaves,J (2132)-Limp,E (2399) Rio de Janeiro 2002}) 14. Qxc5 dxc5 15. Bf4 a6 16. Bc7 Rdc8 17. Bd6 Bxd6 18. Rxd6 {[#] Threatens to win with e5.} Bc6 19. a4 Rd8 20. Rxd8+ Rxd8 21. Be2 Kf8 22. Kc1 Ke7 23. Rd1 Rd4 24. b3 Nh5 25. Bd3 Ng3 26. Ne2 Nxe2+ 27. Bxe2 Rxd1+ 28. Kxd1 $11 {KB-KB} f5 29. e5 a5 30. Kd2 b6 31. Ke3 h6 32. g3 {Weighted Error Value: White=0.12/Black=0.10} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.5"]
[White "Socko, Bartosz"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2618"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "126"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,126,9,0,6,10,8,9,4,16,11,22,14,13,11,13,21,6,10,5,13,7,8,14,10,11,2,15,20,0,0,0,0,0,34,36,29,31,82,72,127,132,134,144,138,135,155,71,242,242,242,242,242,242,242,200,200,200,200,200,200,20,80,80,80,80,80,25,30,72,72,0,0,0,79,0,0,0,79,20,1633,1633,29971,29973,29971,29974,29977,29977,29976,29978,29973,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 Be6 9. Bb3 O-O 10. O-O b5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 11. a4 {Black must now prevent Bxe6. Recently 11.Re1 got a lot of attention.} b4 12. Nd5 Bxd5 13. Bxd5 Nxd5 14. Qxd5 Nd7 15. Qd3 Qc7 16. Nd2 Rfc8 17. Rfc1 Nc5 18. Bxc5 Qxc5 19. c4 bxc3 20. Rxc3 Qd4 21. Qxd4 exd4 {[#]} 22. Rc4 $146 ({Predecessor:} 22. Rd3 Rc2 23. Rb1 Rb8 24. b3 Bg5 25. Nf3 Rc3 26. Rbd1 Bf6 27. Nxd4 Rxd3 28. Rxd3 Bxd4 29. Rxd4 Rxb3 {1-0 (54) Korneev,O (2530)-Drygalov,S (2485) Sochi 2019}) 22... d3 23. Kf1 Bg5 24. Rxc8+ Rxc8 $11 {[%mdl 4096] Endgame KRB-KRN} 25. Nf3 Bc1 26. Ra3 d2 27. Rd3 {[%mdl 64] Double Attack} Rc2 (27... Bxb2 $14 28. Rxd6 (28. Rxd2 Ba3 $11) 28... Ba3 29. Rxd2 Kf8) 28. Rxd6 {[%cal Rd6d8]} f6 (28... Kf8 $142) 29. b3 $16 Rb2 30. Ke2 Rxb3 31. Rxa6 Rb4 32. Nxd2 (32. Kd1 $142) 32... Bxd2 $2 (32... Rb2 $16) 33. Kxd2 $18 Rxe4 $16 {KR-KR} 34. Ra7 h5 35. a5 Ra4 36. a6 Kh7 37. Kc3 Kg6 38. Kb3 Ra1 39. h4 $2 (39. Ra8 $18) 39... Ra5 (39... Kf5 $11) 40. Kb4 Ra2 41. Kb5 Rb2+ 42. Kc6 (42. Kc4 $1 $16 {And now Rd7 would win.} Rxf2 43. Kb3 Rxg2 44. Rxg7+ $3 {[%mdl 576] Clearance, Promotion} Kxg7 45. a7) 42... Rc2+ $1 $11 43. Kb6 Rb2+ 44. Kc5 (44. Ka5 $1 $16 Ra2+ 45. Kb5 Rb2+ 46. Kc4) 44... Rc2+ $1 45. Kb6 (45. Kd4 $11 Rxf2 46. Rc7 Rxg2 47. Kc5) 45... Rb2+ $1 $16 {[#]} 46. Kc6 (46. Ka5 $1 $16 Ra2+ 47. Kb5 Rb2+ 48. Kc4) 46... Rc2+ $1 $11 47. Kb6 (47. Kd5 $11 Rxf2 48. Rc7 Rxg2 49. Kc5) 47... Rb2+ $1 $16 {[#]} 48. Kc7 ({White should try} 48. Ka5 $1 $16 Ra2+ 49. Kb5 Rb2+ 50. Kc4) 48... Rxf2 $2 {[%mdl 8192]} (48... Rc2+ $11 49. Kb6) 49. Rb7 $18 Ra2 50. a7 Kf5 51. Kb8 g5 52. a8=Q Rxa8+ 53. Kxa8 {KR-K3P} Kg4 54. Rb4+ $2 (54. Rb3 {mates} Kxh4 55. Kb7 f5 56. Kc6 g4 57. Kd5 Kg5 58. Ke5 f4 59. Ke4) 54... Kg3 $11 {The position is equal.} 55. hxg5 fxg5 {KR-KPP} 56. Rb2 g4 57. Kb7 h4 58. Kc6 h3 59. gxh3 gxh3 60. Kd5 h2 61. Rb1 Kg2 62. Ke4 h1=Q 63. Rxh1 Kxh1 {Black defended with fortune.  Weighted Error Value: White=0.23/Black=0.22} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.5"]
[White "Sadzikowski, Daniel"]
[Black "Socko, Bartosz"]
[Result "1/2-1/2"]
[ECO "B63"]
[WhiteElo "2527"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,83,0,-15,-35,19,-20,-21,-23,14,13,27,22,118,117,94,110,125,117,154,95,83,64,84,72,78,25,31,0,0,0,0,-85,0,-97,-74,-226,-239,-246,-256,-1064,328,309,327,183,440,277,285,294,289,282,292,289,294,280,278,295,293,265,269,178,182,89,105,76]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O Nxd4 9. Qxd4 O-O 10. f3 a6 11. Be3 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 12. Kb1 {B66: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 h6.} Rb8 (12... Qa5 $15) 13. g4 {[#]} b4 $146 ({Predecessor:} 13... Qc7 14. h4 b4 15. Ne2 a5 16. h5 e5 17. Qd2 Be6 18. g5 Nd7 19. f4 exf4 20. Nxf4 {1-0 (29) Sikorska,A (2107)-Rath,A (1884) Germany 2007}) 14. Ne2 {The position is equal.} e5 15. Qd2 Be6 16. g5 Nh5 (16... Nd7 $11) 17. Ng3 $16 Nf4 18. h4 $1 ({Reject} 18. Bxf4 $6 Qa5 $11) 18... Qa5 19. b3 Rfc8 20. Nf5 (20. Bxf4 $142 {aiming for Be3.} exf4 21. Nh5) 20... Bf8 {[#]} 21. Nd4 $1 exd4 (21... Rc3 22. Bxf4) 22. Bxf4 Rc3 23. Qf2 ({White should try} 23. Qxd4 $16 Rxf3 24. Bxd6) 23... Rbc8 $11 24. Bd3 Qc5 25. Bc1 a5 $1 26. f4 (26. Rh2 $11 {remains equal.}) 26... a4 $1 $17 27. Bb2 (27. f5 $1 $11 Bd7 28. Bb2) 27... Qa7 28. Bxc3 $2 (28. Rh2 $17 {is a better defense.}) 28... bxc3 $19 29. b4 {Black must now prevent a3.} Rb8 $1 {[%cal Rb8b4][%mdl 1024] Black has strong compensation.} 30. a3 {[#]} (30. Bb5 Rxb5 31. a3) 30... Qc5 $4 {[%mdl 8192]} (30... Rxb4+ $3 $19 {[%mdl 512] avoids the disaster.} 31. axb4 a3) 31. Rdg1 $18 d5 32. e5 (32. f5 $142 Rxb4+ 33. axb4 Qxb4+ 34. Kc1) 32... Qa7 $2 (32... Qa5 {might work better.}) 33. Kc1 Bxb4 34. axb4 a3 {[#]} 35. Kd1 $1 a2 36. Ke2 a1=Q 37. Rxa1 (37. Bxh7+ $2 Kxh7 38. Rxa1 Bg4+ 39. Kd3 Bf5+ 40. Ke2 d3+ 41. Kf3 Be4+ 42. Kg3 Qxf2+ 43. Kxf2 d2 $19) 37... Bg4+ 38. Kf1 Qxa1+ 39. Kg2 Qa7 40. b5 g6 {[#]} 41. Rb1 (41. h5 $1 $18 {and White stays clearly on top.}) 41... Qc5 42. Kg3 {Weighted Error Value: White=0.48/Black=0.36} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.6"]
[White "Bartel, Mateusz"]
[Black "Teclaf, Pawel"]
[Result "1/2-1/2"]
[ECO "D20"]
[WhiteElo "2635"]
[BlackElo "2502"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,61,7,59,-20,0,0,0,2,8,13,11,-17,24,-57,-53,-50,-31,-34,-27,-35,-7,-17,0,0,33,58,50,50,33,10,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 dxc4 3. e4 b5 4. a4 c6 5. Nc3 a6 (5... b4 $1 $11 6. Nce2 e6) 6. Nf3 {D20: Queen's Gambit Accepted: 3 e3 and 3 e4.} (6. axb5 $14 cxb5 {[#]} 7. Nxb5 $1 {[%mdl 576] Pin}) 6... e6 7. axb5 cxb5 8. Nxb5 axb5 9. Rxa8 {[#]} Bb7 $146 ({Predecessor:} 9... Na6 10. b3 Bb4+ 11. Bd2 c3 12. Bxb5+ Kf8 13. Bxa6 cxd2+ 14. Nxd2 Qxd4 15. Rxc8+ Ke7 {1-0 (22) Ballarin,S (905)-Lebduska,D (668) LSS email 2013}) 10. Ra7 Qb6 11. Rxb7 Qxb7 $15 12. Be2 Bb4+ 13. Bd2 Bxd2+ 14. Qxd2 Qxe4 15. O-O Nf6 16. Ne5 {[#] aiming for Bf3.} O-O 17. Bf3 {[%mdl 1024] White has compensation.} Qh4 18. g3 Qh3 19. Qb4 Qf5 {The position is equal.} 20. Bg2 (20. Re1 {is interesting.} Nbd7 21. Kg2 Nxe5 22. dxe5 Nd5 23. Qxb5 Qd3 24. Qa4) 20... Nbd7 21. Nc6 {Strongly threatening Ne7+.} Qc2 22. Qxb5 g6 23. d5 exd5 24. Bxd5 c3 25. bxc3 Qxc3 26. Bg2 Re8 27. Qb4 Qxb4 28. Nxb4 Kg7 29. Nd5 Nxd5 30. Bxd5 Nf6 31. Bf3 {Weighted Error Value: White=0.17/Black=0.11} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.30"]
[Round "1.6"]
[White "Sadzikowski, Daniel"]
[Black "Socko, Bartosz"]
[Result "0-1"]
[ECO "B63"]
[WhiteElo "2527"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "144"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,144,28,39,36,49,36,39,25,47,37,52,54,43,0,0,0,10,2,9,0,0,-28,0,0,0,-58,0,0,45,25,6,0,0,0,0,0,1,9,99,106,115,93,123,0,0,-35,-35,-202,35,46,87,40,7,123,167,123,150,108,229,58,152,40,171,0,0,0,0,-20,-16,-905,-598,-886,-886,-903,-875,-807,-795,-770,-733,-1082,-1082,-1082,-1082,-1057,-1041,-1065,-1030,-914,-1042,-1010,-823,-698,-637,-679,-634,-29966,-29960,-29964,-29963,-29968,-29970,-29971,-29967,-29973,-29974,-29978,-29979,-29979,-29980,-29980,-29979,-29983,-29980,-29980,-29981,-29987,-29988,-29988,-29989,-29996,-29982,-29990,-29991,-29991,-29992,-29992,-29993,-29997,-4618]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O Nxd4 {8...a6 is the modern continuation.} 9. Qxd4 O-O 10. h4 {B63: Sicilian: Richter-Rauzer: 7...Be7 and unusual Black 7th moves.} Bd7 11. f3 Bc6 12. Kb1 {White is slightly better.} Qc7 13. g4 Rfd8 {[#]} 14. Bd3 $146 ({Predecessor:} 14. h5 h6 15. Bc1 d5 16. e5 Nd7 17. f4 Bc5 18. Qd3 Bb4 19. Rg1 Qb6 20. Be3 {1-0 (58) Reinaldo Castineira,R (2402)-Balogh,C (2448) ICC INT 2003}) 14... a6 15. h5 h6 16. Bh4 Nh7 $1 17. Bxe7 Qxe7 18. Qe3 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 19. f4 b4 20. Ne2 e5 $1 21. Rhf1 (21. Ng3 $11) 21... a5 ({Black should try} 21... Bd7 $1 $15) 22. Bc4 Rf8 23. Ng3 $36 {[%mdl 2048] With the idea Nf5. White is pushing.} Bd7 24. fxe5 dxe5 25. Nf5 Bxf5 26. Rxf5 Ng5 27. Rd5 Rad8 (27... Qc7 $11 28. b3 a4) 28. Rfxe5 $16 Qc7 29. Bd3 a4 30. Rf5 (30. Qc5 $16 Qb8 31. Rxd8 Rxd8 32. Qb5) 30... a3 31. Qc5 Qg3 {[%cal Rg3e1]} 32. Qxb4 (32. Rf1 $1 $15) 32... Qxg4 $2 (32... Rxd5 $1 $19 33. exd5 Rb8) 33. bxa3 $14 Qxh5 34. a4 {[%cal Ba3a4,Ba4a5,Ba5a6][%mdl 32]} Qd1+ (34... Rc8 $14) 35. Kb2 $16 Ne6 36. a5 Qg1 37. a6 g6 {[#]} (37... Rc8 $16 {keeps fighting.}) 38. Rfe5 $2 (38. Rxd8 $1 $18 Rxd8 39. Rb5) 38... Ra8 (38... Qa7 $14) 39. a4 (39. Rd6 $16) 39... h5 {[#]} (39... Qh2 $1 $14) 40. Ra5 $2 (40. Rd6 $1 $18) 40... h4 $11 {Strongly threatening ...h3.} 41. Bc4 Qd4+ 42. Qc3 h3 43. Bxe6 {[%mdl 8192] White is now going downhill.} (43. Red5 $11 Rfb8+ 44. Bb3 Qxc3+ 45. Kxc3) 43... Qxc3+ $19 44. Kxc3 h2 45. Rh5 gxh5 {[%mdl 4096] Endgame KRR-KRB} 46. Rg5+ Kh7 47. Rxh5+ Kg6 48. Bxf7+ Rxf7 49. Rxh2 Rxa6 50. Rg2+ Kh6 51. Kb4 Rb7+ 52. Kc5 Rxa4 53. e5 Re4 54. Kd5 Re1 55. e6 Rb5+ 56. Kc6 Rbe5 {Black mates.} 57. c4 Rxe6+ 58. Kb5 Rc1 59. Rd2 Kg7 60. Rd7+ Kf6 61. c5 Re5 62. Rc7 Ke6 63. Kb6 Rc2 64. Rc8 Kd7 65. Rc7+ Kd8 66. Rc6 Rb2+ 67. Ka7 Re1 68. Rb6 Ra1+ 69. Kb8 Rab1 70. Kb7 Rxb6+ 71. cxb6 Kd7 72. Ka8 Rxb6 {Weighted Error Value: White=0.52/Black=0.26} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.7"]
[White "Markowski, Tomasz"]
[Black "Piorun, Kacper"]
[Result "0-1"]
[ECO "A20"]
[WhiteElo "2546"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,66,18,21,15,22,14,8,18,17,-23,-23,-19,-16,-25,-13,-70,-61,-77,-68,-69,-74,-64,-69,-70,-70,-43,-66,-142,-139,-134,-140,-133,-122,-143,-144,-226,-206,-197,-165,-367,-380,-425,-431,-552,-539,-657,-633,-809,-769,-827,-831,-1597,-1464,-1810,-1833,-29981,-29981,-29981,-29982]} 1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. Nf3 e4 5. Nd4 Qb6 6. Nb3 {A20: English Opening: 1...e5.} a5 {[#] Strongly threatening ...a4.} 7. d3 a4 8. N3d2 {The position is equal.} Bc5 9. e3 exd3 10. O-O O-O 11. Nc3 Qa6 {[#]} 12. Nce4 $146 ({White should try} 12. Nde4 $11 Be7 13. Nxf6+ (13. Qxd3 d5 $17) 13... Bxf6 14. Be4) ({Predecessor:} 12. b3 a3 13. Nf3 d5 14. cxd5 cxd5 15. Ne5 Bf5 16. g4 Nbd7 17. Nxd7 Bxd7 18. g5 {0-1 (31) Gorodetzky,D (2489)-Ter Sahakyan,S (2640) chess.com INT 2020}) 12... Be7 $1 $15 13. Rb1 d5 14. Nxf6+ Bxf6 15. cxd5 cxd5 16. Bxd5 Be6 17. Bxe6 Qxe6 18. b3 {[#] White is on the road to losing.} (18. a3 $1 $15) 18... a3 $1 $17 19. Nf3 Rd8 $36 {[%mdl 2048] Keeping White busy.} 20. Bd2 Nc6 21. Rc1 Rd5 22. Bc3 (22. Ne1 $17) 22... Bxc3 $19 23. Rxc3 d2 24. Rc4 $2 (24. b4) 24... Qf6 25. Kg2 {and the idea Qc2 leaves White hopeful.} Rad8 26. h4 h6 27. g4 b5 28. Rf4 Qb2 29. g5 Rc5 30. Nd4 Nxd4 31. exd4 Rxd4 32. Qf3 Rxf4 33. Qxf4 Rc1 {Weighted Error Value: White=0.92/Black=0.02} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.04.29"]
[Round "1.8"]
[White "Kempinski, Robert"]
[Black "Krasenkow, Michal"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2561"]
[BlackElo "2597"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,63,16,18,2,-3,9,6,-7,12,5,13,8,17,16,17,17,23,24,32,26,28,25,25,22,50,37,50,60,100,98,97,89,93,103,100,100,224,212,241,235,252,216,269,262,997,996,990,975,900,896,1012,854,951,677,902,871]} 1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. Nc3 e5 5. Bg5 f6 6. Bd2 {A41: 1 d4 d6: Tartakower System and Modern Defence.} exd4 7. Nxd4 f5 {[#]} 8. e3 $146 {The position is equal.} ({Predecessor:} 8. Bf4 Nc6 9. e3 Nf6 10. Be2 O-O 11. O-O Nxd4 12. exd4 Be6 13. Qc2 Qd7 14. d5 {½-½ (46) Eman,J (2230)-Velker,W (2190) ICCF email 2015}) 8... Nf6 9. g3 Na6 {[%cal Bb8a6,Ba6c5,Bc5e4][%mdl 32]} 10. Bg2 Nc5 11. Qc2 O-O 12. O-O Re8 13. Rfd1 c6 14. Be1 a5 15. Nb3 {[#] aiming for Nxc5.} Nce4 16. Na4 b5 17. cxb5 cxb5 18. Nc3 Qb6 19. Nd4 b4 20. Nxe4 Nxe4 21. a3 bxa3 22. bxa3 Be6 {This costs Black the game.} (22... Bxd4 $16 {was called for.} 23. Rxd4 Be6) 23. Nxe6 $18 Rxe6 24. Rab1 Qd8 25. Qc4 Qd7 26. Qd5 Ra7 {[#]} (26... Rae8 27. Bf1 (27. Qxa5 Qd8 $18) 27... Qa7) 27. Rb8+ {White is clearly winning.} Bf8 28. Bxe4 fxe4 29. Rc1 Kf7 30. Bxa5 Be7 31. Rc4 Kg7 32. Bb6 {Weighted Error Value: White=0.16/Black=0.23} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.01"]
[Round "2.1"]
[White "Moranda, Wojciech"]
[Black "Heberla, Bartlomiej"]
[Result "1/2-1/2"]
[ECO "C81"]
[WhiteElo "2618"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 32,75,17,17,17,15,10,0,0,0,24,31,24,10,16,19,12,19,12,0,0,0,0,0,10,10,26,26,26,26,28,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Bc5 13. Be3 Bxe3 14. Qxe3 Qb8 15. Bb3 Na5 16. Nbd2 Qa7 17. Qxa7 Rxa7 {C81: Open Ruy Lopez: Keres Variation (9 Qe2).} 18. Rac1 c5 19. Ba4 Nxd2 20. Nxd2 {[#]} Nc4 $146 ({Predecessor:} 20... Rc8 21. b3 Rac7 22. f4 h6 23. Kf2 Nb7 24. Nf3 Nd8 25. h3 f5 26. exf6 gxf6 {1-0 (59) Quesada Perez,Y (2645)-Gonzalez Vidal,Y (2550) Montevideo 2015}) 21. Nxc4 dxc4 22. b3 cxb3 23. Bxb3 Bxb3 24. axb3 $11 {[%mdl 4096] Endgame KRR-KRR} Rb7 25. Rc3 g6 26. g3 Rfb8 27. Rdd3 Rb5 28. f4 Ra5 29. Kg2 Ra2+ 30. Kh3 Rb2 31. Kg4 Rxh2 {The position is equal.} 32. Rxc5 Rb7 33. Rc6 (33. Ra5 {keeps more tension.} Rb2 34. Rxa6 R2xb3 35. Rd8+ Kg7 36. Raa8) 33... Rb2 34. Rxa6 R2xb3 35. Rxb3 Rxb3 36. Ra8+ Kg7 37. Ra7 Re3 38. Rb7 {A rather calm draw.  Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.01"]
[Round "2.1"]
[White "Socko, Bartosz"]
[Black "Piorun, Kacper"]
[Result "1/2-1/2"]
[ECO "B34"]
[WhiteElo "2618"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,62,14,12,0,10,0,10,0,31,33,37,0,25,0,0,0,31,27,33,-2,8,0,6,0,20,-50,-14,-14,-21,-10,0,0,0,0,0,0,0,0,0,-26,0,0,0,-23,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Ne7 9. c4 Ng6 {[%cal Be7g6,Bg6f8,Bf8d7,Bd7e5,Be5f7][%mdl 32]} 10. g3 {B33: Sicilian: Pelikan and Sveshnikov Variations.} a6 11. Nc3 Be7 12. h4 f5 13. h5 Nf8 {[#]} 14. Be3 $146 ({Predecessor:} 14. Bg2 Nd7 15. O-O O-O 16. b4 Qc7 17. Qb3 Nf6 18. h6 b6 19. a4 Rb8 20. Bd2 {0-1 (34) Mihevc Mohr,N (2142)-Boehmer,E (2128) Graz 2010}) 14... Nd7 15. Qd2 O-O 16. O-O-O e4 17. Kb1 Ne5 18. Be2 Bd7 19. c5 Rc8 20. h6 {Threatening c6!} g6 21. Bd4 (21. Rc1 $11) 21... Bf6 22. cxd6 Nf7 23. f4 Nxd6 24. Rc1 Kf7 25. Rc2 Bxd4 26. Qxd4 Qf6 27. Qe3 Rg8 28. Rcc1 Rc7 29. Rc2 {[#] Threatens to win with Nxe4.} Rcc8 30. Rcc1 Rc7 31. Rc2 {Strongly threatening Nxe4.} Rcc8 {Weighted Error Value: White=0.12/Black=0.09} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.01"]
[Round "2.1"]
[White "Gajewski, Grzegorz"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "A37"]
[WhiteElo "2596"]
[BlackElo "2694"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,60,13,24,0,3,0,0,0,8,0,18,0,20,25,16,0,16,12,30,26,26,6,30,33,33,33,24,-40,0,0,0,0,13,9,19,19,21,5,12,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 c5 2. g3 Nc6 3. c4 g6 4. Bg2 Bg7 5. Nc3 d6 6. O-O Bf5 {seems to push 6...e5 aside.} 7. h3 {A37: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3.} e5 8. d3 Nge7 9. a3 {[%cal Ba2a3,Ba3a4,Ba4b5][%mdl 32] [#]} a5 $146 ({Predecessor:} 9... O-O 10. Bd2 Rb8 11. b4 b6 12. Qa4 Bd7 13. Nb5 a6 14. Qxa6 e4 15. dxe4 Ra8 {½-½ (28) Gajewski,G (2648)-Ragger,M (2668) Montpellier 2015}) 10. Ng5 O-O 11. Nb5 Na7 12. a4 Nxb5 13. axb5 Rb8 14. f4 f6 15. Ne4 b6 16. Nc3 Qd7 17. Kh2 Be6 18. e4 $1 f5 19. Nd5 ({White should try} 19. Qe2 $11) 19... Nxd5 20. exd5 {The position is equal.} Bf7 21. Ra2 Be8 22. b3 Qf7 23. fxe5 Bxe5 24. Bh6 Bd7 25. Re2 Rfe8 26. Qd2 Qf6 27. Rff2 Bc3 28. Qf4 Be5 29. Qd2 Bc3 30. Qf4 Be5 {Weighted Error Value: White=0.08/Black=0.07} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.01"]
[Round "2.1"]
[White "Teclaf, Pawel"]
[Black "Kempinski, Robert"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2502"]
[BlackElo "2561"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,67,19,28,24,21,22,24,6,4,0,61,72,78,60,84,84,78,70,76,0,0,-34,-22,0,68,-21,61,68,175,111,155,151,143,156,247,213,224,222,197,199,465,462,560,559,555,566,585,595,597,594,590,583,577,528,659,646,1420,1314]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Nb3 Nc6 7. Be3 {B56: Classical Sicilian: Unusual Lines.} e6 8. Qe2 Qc7 9. O-O-O {White has an edge.} b5 10. g4 {[#]} Ne5 $146 (10... h6 $11) ({Predecessor:} 10... Bb7 11. Bg2 Be7 12. f4 Nd7 13. f5 Nde5 14. g5 Nd8 15. h4 Nc4 16. Bd4 e5 {1-0 (55) Schnider,G (2292)-Breneis,L (2087) Aschach 2004}) 11. g5 $1 $14 {[%cal Rg5f6]} Nfd7 12. f4 Nc4 13. Bd4 Bb7 14. Bh3 O-O-O 15. Qh5 (15. a3 $16) 15... b4 $11 16. Qxf7 bxc3 17. Bxc3 Ndb6 (17... d5 $11) 18. Qxc7+ (18. Qxe6+ $2 Kb8 $19) 18... Kxc7 19. Nd4 Kb8 {White leaves nothing to chance now.} ({Black should try} 19... Bc8 $1 $14) 20. b3 ({Better is} 20. Nxe6 $18 Re8 21. Rhe1) 20... Ne3 {[#]} 21. Rde1 $36 {[%cal Re1e3][%mdl 2048] Keeping Black busy.} Bxe4 {aiming for ...e5.} 22. Rhg1 Ned5 (22... Nbd5 $16) 23. Ba5 Nxf4 {And now ...d5 would win.} 24. Rxe4 Nxh3 {[#]} 25. Rg3 ({Resist} 25. Bxb6 $6 Nxg1 26. Bxd8 e5 $14) 25... Kb7 (25... Rd7 {keeps fighting.} 26. Rxh3 (26. Bxb6 d5 $16) 26... e5) 26. Nxe6 $18 {White is clearly winning.} ({Weaker is} 26. Rxh3 Rd7 $18) 26... Re8 {[#] White should prevent ...d5.} 27. Nc5+ $1 {[%mdl 512]} dxc5 28. Rxe8 Nf4 29. Rf3 Ng6 {Now ...Be7 and Black clings on.} 30. Rf7+ Kc6 31. Bxb6 Kxb6 32. h4 Kc6 33. h5 Be7 34. Rfxe7 {Weighted Error Value: White=0.13/Black=0.40} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.2"]
[White "Wojtaszek, Radoslaw"]
[Black "Gajewski, Grzegorz"]
[Result "1/2-1/2"]
[ECO "D40"]
[WhiteElo "2694"]
[BlackElo "2596"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,66,-16,-7,-7,0,0,0,11,-12,-19,-14,-19,-21,-25,-33,-12,-21,-6,-35,-9,-26,-6,-46,-46,-52,-43,-43,-51,-51,-51,-43,-47,-71,-15,-14,-22,-22,-21,-22,-14,-14,-21,-29,-23]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c5 5. e3 Nc6 6. a3 dxc4 7. Bxc4 a6 8. Bd3 cxd4 9. exd4 Be7 10. O-O O-O 11. Bc2 b5 12. Qd3 Bb7 13. Re1 g6 {D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4.} 14. Bh6 Re8 15. Rad1 Rc8 {The position is equal.} 16. Bb1 b4 17. axb4 Nxb4 18. Qe2 Nbd5 {[#]} 19. Nxd5 $146 ({Predecessor:} 19. Rc1 Qb6 20. Ne5 Qxd4 21. Nxf7 Bb4 22. Be3 Nxe3 23. fxe3 Qh4 24. Ne5 Bd6 25. Nf3 {0-1 (41) Alekseev,V (2461)-Novopashin,A (2385) Alushta 1999}) 19... Nxd5 20. Be4 Bb4 21. Rf1 Bd6 22. h4 f5 23. Bb1 Bf4 24. Bg5 Bxg5 25. hxg5 Nf4 26. Qe3 Bxf3 27. Qxf3 Qxg5 28. Rfe1 h5 (28... Qg4 $17 {Threatens to win with ...Qxf3.} 29. Qxg4 fxg4) 29. g3 $11 Nh3+ 30. Kg2 Qg4 31. Qxg4 hxg4 32. f3 $1 Rb8 33. fxg4 Ng5 {Weighted Error Value: White=0.08/Black=0.10} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.2"]
[White "Kempinski, Robert"]
[Black "Teclaf, Pawel"]
[Result "1-0"]
[ECO "D97"]
[WhiteElo "2561"]
[BlackElo "2502"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,63,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,47,50,129,129,140,160,157,150,208,201,593,590,29985,29986,29986,29987,29987,29988]} 1. d4 {Mueller,Karsten} Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6 8. e5 b5 9. Qb3 Nfd7 $1 10. e6 {D97: Grünfeld: Russian System: 7 e4, replies other than 7...Bg4.} fxe6 11. Ng5 {[#]} Bxd4 $146 ({Predecessor:} 11... Nb6 12. Nxe6 Bxe6 13. Qxe6+ Kh8 14. Be3 Qd6 15. Qxd6 exd6 16. h4 Nc6 17. O-O-O b4 {1-0 (46) Yu,Y (2738)-Ding,L (2836) chess24.com INT 2020 CBM 196 Extra [Mueller,Karsten]}) 12. Nxe6 {The position is equal.} Bxf2+ 13. Ke2 Nc5 14. Nxc5+ (14. Nxd8+ $2 {perishes.} Nxb3 15. axb3 Bg4+ 16. Kd2 Rxd8+ 17. Bd3 Nc6 $19) 14... e6 {Strongly threatening ...Nc6.} 15. N3e4 $1 {[%cal Re4f2]} ({Don't go for} 15. Nxe6 $2 Qe8 $19) 15... Bxc5 16. Nxc5 Nc6 $1 {[%cal Rc6d4] White must now prevent ...Nd4+.} 17. Be3 Nd4+ 18. Bxd4 Qxd4 19. Qc3 $1 {[%cal Rc3d4]} Qf2+ 20. Kd1 e5 $1 {And now ...Bf5 would win.} 21. Bd3 Bg4+ 22. Kc1 Rad8 23. Re1 Qxg2 24. a4 $36 {[%mdl 2048] White fights for an advantage.} Bf5 ({Black should try} 24... Rd4 $14) 25. Bxf5 $16 Rxf5 26. Kb1 Rd4 {[#] aiming for ...Rf3.} 27. axb5 $1 ({Not} 27. Nxa6 Rf3 $11) 27... axb5 {[#]} (27... Rf1 $16) 28. Ne6 $1 $18 {[%mdl 64] Discovered Attack} Rc4 (28... Rd2 {is tougher.}) 29. Qd3 Rf2 {[%csl Gg2][%cal Rf2b2]} 30. Qd8+ {[%mdl 64] Double Attack. White mates.} Kf7 31. Qd7+ {[%mdl 64] Double Attack} Kf6 32. Qg7+ {Weighted Error Value: White=0.00/Black=0.58} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.2"]
[White "Heberla, Bartlomiej"]
[Black "Moranda, Wojciech"]
[Result "0-1"]
[ECO "B84"]
[WhiteElo "2556"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,100,0,8,1,22,0,0,0,21,0,42,0,0,0,16,0,2,0,0,0,104,110,106,103,102,93,95,97,114,104,166,160,164,156,158,148,207,210,206,204,210,199,199,78,160,0,0,0,0,-464,-533,-541,-540,-533,-533,-714,-729,-688,-659,-570,-753,-29964,-29953,-29975,-29976,-29978,-29978,-29988,-29979,-29974,-29980,-29980,-29980,-29979,-29979]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Be7 8. f4 Qc7 9. Kh1 O-O 10. Qe1 Nc6 11. Be3 Nxd4 12. Bxd4 b5 13. a3 Bb7 14. Qg3 Rad8 15. Rae1 {B85: Sicilian Scheveningen: 6 Be2 a6, lines with early Be3.} Rd7 {15...Bc6 is the modern continuation.} 16. Bd3 Re8 {16...Qd8 is vanishing.} 17. Nd1 {The position is equal.} Bd8 18. Bc3 {[#]} Qc5 $146 ({Predecessor:} 18... g6 19. Nf2 Nh5 20. Qg4 e5 21. Nh3 Rde7 22. f5 Bc8 23. Qh4 Rd7 24. Qf2 Qc5 {0-1 (55) Golecki,J (2117)-Mis,M (2366) Szklarska Poreba 2021}) 19. Nf2 e5 20. Ng4 Nxg4 21. Qxg4 Qc8 22. Re3 Rc7 23. Qh5 g6 (23... Bf6 $1 $11 {keeps the balance.}) 24. Qh6 $16 f6 25. Rg3 $1 Rg7 26. f5 g5 27. h4 $1 $40 {[%mdl 128] White has strong attack.} g4 28. Qh5 {[%cal Rh5e8]} Bb6 (28... Qd7 $16 {is a better defense.}) 29. Bd2 $1 $18 (29. Rxg4 $6 Ree7 $14) 29... Kh8 30. Bh6 ({Of course not} 30. Rxg4 $6 Rxg4 31. Qxg4 d5 $11) 30... Rd7 31. Rxg4 d5 (31... Rg8 $16 {might work better.}) 32. Rf3 $1 {Threatening mate with Bg7+!} Ree7 {Threatening ...dxe4.} 33. Rfg3 $1 Bf2 ({Reject} 33... dxe4 $6 34. Bxe4 Bxe4 35. Rg8+ Qxg8 36. Rxg8+ Kxg8 37. Qg4+ Kh8 38. Qxe4) 34. Rg8+ Qxg8 35. Rxg8+ Kxg8 {[#]} 36. a4 $2 ({Better is} 36. Qe2 $1 $16 {[%cal Re2f2]} Bb6 37. g4) 36... dxe4 $11 37. Bxe4 Rd4 38. Qf3 {[%mdl 8192]} Rxe4 $19 ({And not} 38... Bxe4 39. Qxf2 Rxa4 40. Kg1 $11) 39. Qxf2 Rg4 {[%mdl 64] Discovered Attack} 40. Qd2 {[#] Intending Qd8+ and mate.} Kf7 $1 41. Qe3 Rxg2 {And now ...Rc7 would win.} 42. Qb3+ Ke8 {aiming for ...Rg3+.} 43. Be3 b4 44. a5 h5 {Black mates.} 45. Qa2 Bc6 46. Qb3 Kd8 47. Qa2 Rd7 48. Bb6+ Kc8 49. Qe6 Rxc2+ 50. Kg1 Kb7 {[%cal Rd7d1] Weighted Error Value: White=0.46/Black=0.08} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.3"]
[White "Wojtaszek, Radoslaw"]
[Black "Gajewski, Grzegorz"]
[Result "1-0"]
[ECO "D32"]
[WhiteElo "2694"]
[BlackElo "2596"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,53,31,30,34,45,65,20,25,22,25,25,39,21,32,25,41,50,49,48,47,50,69,68,91,46,34,12,133,131,527,493,960,946,1628,1617,1595,1617,1437,1401,6672,6479,29997,29998]} 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. dxc5 d4 7. Na4 Bxc5 {[%mdl 64] [#] Decoy. D32: Tarrasch Defence: Sidelines and lines without g3.} 8. Nxc5 Qa5+ 9. Bd2 Qxc5 {The position is equal.} 10. Rc1 Qb6 11. e3 dxe3 12. Bxe3 Qb4+ 13. Bd2 Qe7+ 14. Be2 Nf6 15. O-O {aiming for Bf4.} O-O 16. Re1 {[#]} Bf5 $146 ({Predecessor:} 16... Be6 17. Qa4 Bd5 18. Be3 Qe4 19. Qxe4 Nxe4 20. a3 Rfe8 21. Red1 Rad8 22. b4 a6 {½-½ (43) Debashis,D (2501)-Srihari,L (2414) chess.com INT 2020}) 17. Bb5 Qd8 18. Qa4 Bd7 19. Qh4 {Strongly threatening Red1.} a6 (19... Bg4 $11 {remains equal.}) 20. Bd3 $16 {Bg5 is the strong threat.} h6 {[%mdl 8192] This costs Black the game.} (20... Re8 $16 {is more resistant.}) 21. Bxh6 $18 Bg4 {[#]} (21... Re8 $142 22. Bxg7 Rxe1+ 23. Rxe1 Kxg7 24. Qg5+ Kh8) 22. Bxg7 $1 {[%mdl 512]} Kxg7 (22... Nh5 23. Qxg4) 23. Qg5+ Kh8 24. Qh6+ Kg8 25. Re3 Re8 26. Ng5 {White wants to mate with Bh7+.} Qd5 27. Bh7+ {Weighted Error Value: White=0.06/Black=0.99} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.3"]
[White "Piorun, Kacper"]
[Black "Socko, Bartosz"]
[Result "0-1"]
[ECO "B18"]
[WhiteElo "2615"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,134,-2,4,9,9,9,12,0,0,0,0,0,28,23,25,35,41,28,26,34,19,27,20,-75,-35,-47,-41,-129,-118,-127,-126,-116,-138,-122,-114,-146,-131,-132,-132,-143,-137,-138,-127,-132,-118,-106,-118,-134,-139,-164,-165,-207,-185,-254,-252,-271,-275,-277,-279,-291,-285,-266,-209,-302,-302,-294,-291,-339,-328,-310,-291,-292,-253,-262,-264,-270,-269,-269,-268,-267,-267,-324,-311,-327,-337,-322,-329,-355,-354,-399,-358,-360,-320,-343,-357,-351,-342,-299,-217,-256,-237,-335,-238,-491,-493,-658,-658,-1229,-1132,-889,-1210,-956,-1017,-1993,-1859,-5081,-5073,-2425,-1445,-2608,-2260,-1791,-1706]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nh3 Nf6 7. Nf4 e5 {7...e5 has lost popularity.} 8. dxe5 {B18: Classical Caro-Kann: 4...Bf5 sidelines.} Qa5+ {[%mdl 64] [#] Double Attack} 9. c3 Qxe5+ 10. Be2 {The position is equal.} Bc5 {[#]} 11. Qb3 $146 ({Predecessor:} 11. O-O O-O 12. Nd3 Bxd3 13. Bxd3 Nbd7 14. Qa4 Rfe8 15. Bc2 Nf8 16. Bf4 Qe6 17. Bf5 {½-½ (24) Azarov,S (2658)-Gelashvili,T (2604) Rockville 2012}) 11... Qc7 12. h4 Qb6 13. O-O Qxb3 14. axb3 Nbd7 15. h5 Bc2 16. Bd1 Bxd1 17. Re1+ Be7 18. Nf5 (18. Rxd1 $11 O-O 19. Be3) 18... Bg4 (18... Bc2 $5 {[%cal Rc2f5]} 19. Nxe7 (19. Rxe7+ Kd8 $17) 19... Kd8 $15) 19. Nxe7 {Black must now prevent Neg6+.} ({Much weaker is} 19. Rxe7+ Kf8 $17) 19... Kd8 20. Ra5 {White is now going downhill.} (20. f3 $15) 20... Re8 $17 21. f3 Rxe7 22. Rxe7 Kxe7 23. fxg4 Nxg4 24. Kf1 Nde5 25. Ke2 a6 26. Be3 Re8 27. Bd4 Kd6 {And now ...Nc4+ would win.} 28. Kd2 f6 29. Bc5+ Kc7 {Threatens to win with ...b6.} 30. Bd4 Nf7 31. b4 Re4 32. Ne2 Nge5 33. b3 (33. Ra1 {is a better defense.}) 33... Rg4 $19 34. Ke3 Rxg2 35. Ra1 Rg5 36. Nf4 {White wants to play Ne6+.} Rg3+ 37. Ke2 Rg4 38. Be3 (38. Ne6+ $142 Kd7 39. Nc5+ Kc8 40. Rg1) 38... Ng5 39. Rd1 Rh4 40. Rd4 Rh2+ 41. Kd1 b5 42. Kc1 Kc8 43. Rd1 Rh4 44. Kc2 g6 45. hxg6 hxg6 46. Kc1 Ngf7 47. Kc2 Rh2+ 48. Kb1 g5 49. Ne6 Re2 50. Bc1 Nf3 51. Nc5 g4 52. Bf4 Re1 53. Kc2 Rxd1 54. Kxd1 {[%mdl 4096] Endgame KBN-KNN} N3e5 55. Ke2 Nd7 {Strongly threatening ...Nxc5.} 56. Ne6 Nd8 57. Nc7 (57. Ng7 {was worth a try.}) 57... Nb6 58. Nxa6 $2 (58. Bg3) 58... Ne6 {Black is clearly winning.} 59. Bh2 Nd7 60. Bd6 Kb7 61. Nc5+ {[#]} Ndxc5 $1 62. bxc5 {KB-KN} f5 63. Kd3 f4 64. Ke4 g3 65. Kf3 Kc8 66. b4 Kd7 67. Be5 Ke7 {Weighted Error Value: White=0.33/Black=0.11} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.3"]
[White "Teclaf, Pawel"]
[Black "Kempinski, Robert"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2502"]
[BlackElo "2561"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,120,20,8,22,14,14,22,22,12,12,10,4,-15,-29,-13,-21,-6,0,0,0,0,47,8,7,23,18,13,18,20,70,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-21,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Nb3 Nbd7 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 7. g4 b5 8. g5 b4 9. Nd5 $1 Nxd5 10. exd5 g6 {[#]} 11. Be3 $146 ({Predecessor:} 11. Qd4 Ne5 12. Qxb4 Bg7 13. Be2 a5 14. Qa4+ Bd7 15. Bb5 O-O 16. Be3 Bg4 17. f4 {½-½ (71) Pridorozhni,A (2567)-Sarana,A (2618) Khanty-Mansiysk 2018}) 11... Bg7 12. Bd4 f6 13. a3 bxa3 14. Rxa3 O-O 15. Na5 Qe8 16. Bg2 fxg5 17. Bxg7 Kxg7 18. O-O Ne5 19. Nc6 Bg4 20. Qd2 (20. Qe1 $1 $14) 20... Bf3 $1 $11 {[%cal Rf3g2] ...Bxg2 is the strong threat.The position is equal.} 21. Nxe5 Bxg2 22. Kxg2 dxe5 23. Re1 Rf5 24. Rae3 Qb8 25. c4 Qd6 26. Qc3 {[%cal Re3e5]} Raf8 27. f3 {[%cal Re3e5]} Kg8 28. Rxe5 {Hoping for c5.} Rxf3 29. Qxf3 Rxf3 30. Kxf3 {[%mdl 4096] Endgame KQ-KRR} Qb4 {[%mdl 64] [#] Double Attack} 31. R1e4 Qxb2 32. Rxe7 Qc3+ 33. Kg4 Qf6 34. Kg3 (34. h3 {feels hotter.} h5+ 35. Kg3 Qc3+ 36. Kg2 Qc2+ 37. Kg3) 34... Qc3+ 35. Kg4 Qf6 36. R7e6 Qf2 {[%cal Rf2g2] [#]} 37. Kxg5 Qf5+ 38. Kh4 Qf2+ 39. Kg5 {White wants to mate with Re8+.} Qf5+ 40. Kh4 Qf2+ 41. Kg4 Kg7 42. Re7+ Kh6 43. Re3 {Rh3+ would kill now.} Qf5+ 44. Kg3 Qg5+ 45. Kf3 Qf5+ 46. Kg2 Qc2+ (46... Qg4+ {seems wilder.} 47. Rg3 Qxc4 48. Rh3+ Kg5 49. Re5+ Kf6) 47. Kg3 Qxc4 48. d6 Qc5 49. d7 Qg5+ 50. Kf2 {Intending Rh3+ and mate.} Qf4+ 51. Ke2 Qc4+ 52. Kf2 Qf4+ 53. Ke2 Qc4+ 54. Kd2 (54. Kd1 $5 {[%cal Re3h3]} Qd5+ 55. Ke1 $11) 54... Qb4+ 55. Kd3 Qd6+ 56. Kc3 Qc5+ 57. Kd3 Qd6+ 58. Kc2 {Threatens to win with Rh3+.} Qc5+ 59. Kd2 Qb4+ 60. Ke2 Qc4+ {Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.4"]
[White "Gajewski, Grzegorz"]
[Black "Wojtaszek, Radoslaw"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2596"]
[BlackElo "2694"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,74,30,11,9,19,45,39,34,0,17,16,13,2,22,27,25,33,31,-12,-16,-16,0,0,0,-9,-14,-40,-24,-31,0,-118,-98,-106,-110,-101,0,-287,-275,-225,-224,-250,10,-300,-118,-102,-110,-287,-294,-417,-408,-311,-214,-219,-70,-489,-449,-1556,-6,-12,-25,-29,-10,-2818,-2315]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 h6 {B81: Sicilian Scheveningen: Keres Attack.} 8. a3 Be7 9. Be3 Nc6 {[#] White is slightly better.} 10. Qe2 $146 ({Predecessor:} 10. Bg2 O-O 11. f4 d5 12. e5 Nd7 13. O-O Nxd4 14. Bxd4 b6 15. Kh1 a5 16. g5 {1-0 (36) Narayanan,S (2565)-Xu,Y (2533) Bhubaneswar 2018}) 10... Nxd4 11. Bxd4 e5 12. Be3 b5 13. O-O-O Bb7 14. Bg2 Rc8 15. h4 {[#]} Rxc3 $1 16. bxc3 Qa5 17. Kb2 Nxe4 18. Bxe4 Bxe4 19. Bb6 Qa4 {White must now prevent ...d5.} 20. f3 Bh7 21. g5 (21. Rd2 $1 $11) 21... O-O $36 {[%mdl 2048] White is under strong pressure.} 22. gxh6 d5 $1 23. Ra1 {And now Rhd1 would win.} d4 (23... Rc8 $17 24. Ra2 Bf6) 24. Rhg1 $2 {[%mdl 8192]} (24. cxd4 $1 $11 {and White stays safe.} Bf6 25. Rhg1) 24... dxc3+ $19 25. Kc1 Bf6 (25... Bxa3+ 26. Kd1 $15) 26. Rg4 b4 $2 ({Black should play} 26... e4 $1 $19 {[%cal Re4f3] Hoping for ...exf3.} 27. hxg7 (27. fxe4 Re8 $17) 27... Re8 28. fxe4 Rxe4 29. Rxe4 Bxe4) 27. Qg2 {[%mdl 8192] [#]} (27. Rxb4 $11 Qd7 28. Rab1) 27... Qb5 $2 (27... e4 $1 $19 {and Black stays clearly on top. aiming for ...b3.} 28. Bc5 (28. fxe4 $2 b3 $19) (28. hxg7 $2 Rb8 $19) 28... Re8 29. fxe4 Bg6 30. Bxb4 Rd8 31. Rxg6 fxg6) 28. Rxb4 $17 (28. hxg7 bxa3 29. gxf8=N+ (29. gxf8=Q+ Kxf8 30. Qf2 Be7 $14) 29... Kxf8 $16) 28... Qd5 29. Rg4 $2 (29. Qe2 $17) 29... Rb8 $19 30. Rb1 (30. Be3 $142) 30... Qa2 31. Rgb4 Qxa3+ 32. Kd1 Qa2 (32... a5 $19 33. Rb5 (33. Bxa5 $2 Rxb4 34. Rxb4 Qa1+ 35. Ke2 Bxc2 $19) 33... Qa2) 33. R4b3 {[%mdl 8192]} (33. Be3 $15 Rd8+ 34. Ke1 Bxc2 35. Rc1) 33... Bf5 34. Bc7 (34. Kc1 $142 g6 35. Qe2) 34... Qxb1+ $2 ({Better is} 34... Rxb3 $19 35. Rxb3 Qa1+ 36. Ke2 {[#]} Bd3+ $1 {[%mdl 512]} 37. cxd3 Qa2+ 38. Ke3 Qxg2 39. Rxc3 e4 40. fxe4 Bxc3) 35. Rxb1 $11 Rxb1+ 36. Ke2 Bxc2 37. Bd8 $2 {[%mdl 8192]} Bg6 {Weighted Error Value: White=1.19/Black=0.53} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.4"]
[White "Kempinski, Robert"]
[Black "Teclaf, Pawel"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2561"]
[BlackElo "2502"]
[Annotator "ChessBase"]
[PlyCount "62"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "900+10"]

1. d4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} b6 {[%emt 0:00:00]} 3. e4 {[%emt 0:00:03]} Bb4+ {[%emt 0:00:00]} 4. Bd2 {[%emt 0:00:10]} Bxd2+ {[%emt 0:00:02]} 5. Qxd2 {[%emt 0:00:08]} d5 {[%emt 0:00:03]} 6. Nc3 {[%emt 0:01:50]} dxe4 {[%emt 0:00:09]} 7. Nxe4 {[%emt 0:00:25]} Bb7 {[%emt 0:00:04]} 8. Nc3 {[%emt 0:00:36]} Nf6 {[%emt 0:00:08]} 9. Nf3 {[%emt 0:00:23]} O-O {[%emt 0:00:34]} 10. Be2 {[%emt 0:00:12]} c5 {[%emt 0:00:29]} 11. O-O {[%emt 0:01:08]} cxd4 {[%emt 0:01:00]} 12. Qxd4 {[%emt 0:00:08]} Nc6 {[%emt 0:00:19]} 13. Qh4 {[%emt 0:00:38]} Ne7 {[%emt 0:01:45]} 14. Rfd1 {[%emt 0:00:39]} Qb8 {[%emt 0:00:47]} 15. Qg3 {[%emt 0:00:25]} Qxg3 {[%emt 0:01:51]} 16. hxg3 {[%emt 0:00:03]} Nf5 {[%emt 0:00:45]} 17. Ne5 {[%emt 0:01:17]} Rfd8 {[%emt 0:00:16]} 18. Bf3 {[%emt 0:00:04]} Bxf3 {[%emt 0:01:14]} 19. gxf3 {[%emt 0:00:02]} Nd4 {[%emt 0:01:35]} 20. Kg2 {[%emt 0:00:32]} Rd6 {[%emt 0:00:56]} 21. Rd3 {[%emt 0:02:47]} Rad8 {[%emt 0:00:18]} 22. Rad1 {[%emt 0:00:37]} Nf5 {[%emt 0:00:57]} 23. Nb5 {[%emt 0:00:37]} Rxd3 {[%emt 0:00:21]} 24. Rxd3 {[%emt 0:00:02]} Rxd3 {[%emt 0:00:07]} 25. Nxd3 {[%emt 0:00:02]} a6 {[%emt 0:00:38]} 26. Nc7 {[%emt 0:00:20]} a5 {[%emt 0:00:19]} 27. c5 {[%emt 0:00:45]} bxc5 {[%emt 0:00:22]} 28. Nxc5 {[%emt 0:00:02]} Nd4 {[%emt 0:00:18]} 29. Nb7 {[%emt 0:01:31]} Nc6 {[%emt 0:00:09]} 30. Nb5 {[%emt 0:00:33]} Nd5 {[%emt 0:00:14]} 31. N5d6 {[%emt 0:00:30]} Nb6 {[%emt 0:00:47]} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.5"]
[White "Teclaf, Pawel"]
[Black "Kempinski, Robert"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2502"]
[BlackElo "2561"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,65,23,4,19,10,20,13,25,-19,20,-45,55,54,68,22,28,36,68,75,70,83,79,-138,-133,-154,-133,-118,-68,-70,-27,0,53,26,91,30,23,0,89,88,233,231,208,116,94,82,118,120,723,644,1245,1222,29965,5406,29961,29962,29984,29978]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Nb3 e6 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 7. g4 b5 8. Bg2 {e5! is the strong threat.} Bb7 {The position is equal.} 9. g5 Nfd7 {[#]} 10. Qe2 $1 $146 {[%mdl 8] An important novelty.} (10. O-O $11) ({Predecessor:} 10. h4 b4 11. Ne2 Nc6 12. O-O h6 13. g6 Qxh4 14. gxf7+ Kxf7 15. a3 a5 16. axb4 axb4 17. Rxa8 Bxa8 {½-½ (25) Svidler,P (2723)-Nepomniachtchi,I (2784) Moscow 2020}) 10... Ne5 (10... b4 $15 11. Nd1 a5) 11. f4 Nc4 12. Nd2 Nxd2 13. Bxd2 Nc6 14. O-O-O Be7 15. h4 Rc8 16. f5 $2 {[#]} (16. Qf2 $16 {and life is bright.}) 16... b4 $1 $17 17. fxe6 fxe6 18. Bh3 bxc3 19. Bxc3 Qd7 {White must now prevent ...0-0.} 20. Bxg7 Rg8 (20... Bxg5+ $11 21. hxg5 Qxg7 22. Bxe6 Qxg5+ 23. Kb1 Rd8) 21. Bc3 {[%mdl 1024] White has compensation.} Kd8 (21... Nd8 $11) 22. Qc4 (22. Rhf1 $16) 22... Rg6 $11 23. Kb1 Ke8 (23... Ne5 $11 24. Qb3 Nc4) 24. h5 $16 Rxg5 (24... Ne5 $16 25. hxg6 Rxc4 26. gxh7 Ng6) 25. Bxe6 $18 Qc7 {[#] aiming for ...Nd8.} 26. Bxc8 ({White should try} 26. Qa4 $18) 26... Qxc8 $16 27. Rhg1 $36 {[%mdl 2048] Strongly threatening Rxg5. White is on the roll.} Ne5 28. Qb3 {Threatens to win with Rxg5.} h6 {[%mdl 8192]} (28... Rxg1 $16 29. Rxg1 Nc4) 29. Rxg5 $18 hxg5 30. Bxe5 dxe5 31. Qg8+ Bf8 32. Rf1 Qc5 33. Qf7+ {[%mdl 64] Double Attack. Never resign too early!  Weighted Error Value: White=0.32/Black=0.62} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.02"]
[Round "2.6"]
[White "Kempinski, Robert"]
[Black "Teclaf, Pawel"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "2561"]
[BlackElo "2502"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,54,21,32,-12,-27,-14,-22,-8,16,27,24,27,23,-20,16,-23,-17,-79,-41,-114,-100,-113,-122,-77,-94,-272,-256,-308,-307,-406,-390,-558,-476,-617,-597,-558,-338,-333,-278,-278,-271,-756,-742,-709,-236,-244,-240]} 1. d4 e6 2. c4 b6 3. e4 Bb4+ 4. Bd2 Bxd2+ 5. Qxd2 d5 6. Nc3 {[%cal Rc4d5] C01: French: Exchange Variation.} dxe4 7. Nxe4 Bb7 8. Nc3 {[#] The position is equal.} c5 $146 ({Predecessor:} 8... Nh6 9. O-O-O Nf5 10. Nge2 Nc6 11. Rg1 O-O 12. g4 Nd6 13. Ng3 e5 14. d5 Nd4 {0-1 (52) Postny,E (2630)-Meier,G (2623) Nancy 2019}) 9. d5 Nf6 10. O-O-O O-O 11. Nf3 (11. dxe6 $5 {[%cal Rd2d8]} Qxd2+ 12. Rxd2 $11) 11... Na6 12. d6 Nb4 13. a3 (13. Qf4 $11 {keeps the balance.}) 13... Nc6 (13... Bxf3 $5 14. gxf3 Nc6 $15) 14. Bd3 ({Better is} 14. Kb1 $15) 14... Nd4 $17 15. Nxd4 cxd4 16. Nb5 e5 ({Much worse is} 16... Bxg2 $6 17. Rhg1 $14) 17. f4 $2 {Loses the game.} (17. Rhe1 $17) 17... e4 $19 18. Bb1 d3 19. Qb4 Rc8 20. Nxa7 (20. Ba2 {is a better defense.}) 20... Rc5 {Threatens to win with ...Nd5.} 21. Nb5 Nd5 22. Qb3 Ne3 23. Rxd3 exd3 24. Qxd3 {[%csl Gb1][%cal Rd3h7] [#]} Rxc4+ 25. Kd2 $2 (25. Nc3 g6 26. Qxe3 Qxd6 27. Rd1 Qxf4 28. Qxf4 Rxf4 29. Rd2) 25... Re4 26. Nc3 Qxd6 $2 27. Nxe4 Bxe4 {Weighted Error Value: White=0.64/Black=0.50} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.04"]
[Round "3.1"]
[White "Wojtaszek, Radoslaw"]
[Black "Socko, Bartosz"]
[Result "1-0"]
[ECO "A62"]
[WhiteElo "2694"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,55,19,21,46,25,31,22,28,16,48,43,20,31,24,0,79,58,77,47,182,201,322,328,430,422,535,533,544,537,545,543,973,983,29989,29990,29992,29990,29994,29995]} 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O Re8 10. Re1 Na6 {A62: Modern Benoni: Fianchetto Variation without early ...Nbd7.} 11. Bf4 {11.Nd2 is setting a new trend.} Ne4 12. Nxe4 Rxe4 {The position is equal.} 13. Nd2 Rxf4 14. gxf4 Bxb2 15. Rb1 Bg7 16. e4 Nb4 (16... Bh6 $11 {remains equal.}) 17. Rb3 $1 $16 Nxa2 18. e5 Nb4 {This costs Black the game.} (18... a5 $14) 19. e6 $1 $18 {[%cal Re6e7] Hoping for e7.} Qe7 {[#]} (19... b5 {is a better defense.}) 20. f5 $146 ({Predecessor:} 20. Ne4 fxe6 21. dxe6 d5 22. Ng3 a5 23. Bxd5 a4 24. Ra3 Nxd5 25. Qxd5 Ra6 26. f5 b5 27. Rd3 Bf6 28. Ne4 Bh4 29. f6 Bxf6 30. Nxf6+ {1-0 (30) Korchmar,V (2406)-Papadopoulos,G (2267) Paleochora 2015}) 20... gxf5 {[%cal Rf7e6] [#]} 21. Nc4 $1 {And now exf7+ would win.} fxe6 22. dxe6 Bxe6 {[#]} 23. Rbe3 $1 Qh4 (23... Be5 24. Nxe5) 24. Nxd6 Bf7 25. Nxf7 Kxf7 26. Qd7+ {White mates.} Kg8 27. Rg3 {[%csl Gg3][%cal Rd7g7]} Qf6 28. Re7 {Weighted Error Value: White=0.02/Black=0.70} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.04"]
[Round "3.1"]
[White "Moranda, Wojciech"]
[Black "Teclaf, Pawel"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2618"]
[BlackElo "2502"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,60,17,19,27,26,29,23,24,35,26,33,20,31,28,25,16,15,15,12,19,22,22,15,13,19,14,29,29,27,22,33,35,55,5,3,6,5,0,2,0,0,0,0,0,0,0,0,0,0,-2,0]} 1. d4 e6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 a6 5. Nc3 Nf6 6. e4 Bb4 7. Qd3 {B41: Sicilian: Kan Variation: 5 c4.} d5 8. exd5 exd5 9. Be2 {White has an edge.} Nc6 10. Nxc6 bxc6 11. O-O O-O 12. Rd1 Be6 13. cxd5 Nxd5 14. Nxd5 Bxd5 {[#]} 15. Bf3 $146 {[%cal Rf3d5]} ({Predecessor:} 15. Bd2 a5 16. Bc3 Qg5 17. Bf3 Rfd8 18. Bxd5 cxd5 19. h3 Rac8 20. Rac1 h6 21. Bd2 Bxd2 22. Rxc8 Rxc8 23. Qxd2 Rc5 {½-½ (23) Svane,R (2543)-Van Wely,L (2632) Berlin 2015}) 15... Bc5 16. Bxd5 cxd5 17. Qxd5 Qb6 18. Qf3 Rad8 19. Rf1 Rd6 20. b3 Rf6 21. Qg3 Rg6 22. Qh3 Re6 {The position is equal.} 23. Bf4 Bd4 24. Rac1 Re2 {[%cal Rd4f2]} 25. Rc8 {And now Rxf8+ would win.} Bxf2+ 26. Kh1 {[#] Threatens to win with Rxf8+.} Bc5 27. Qf3 {White wants to mate with Bd6!} Rxc8 28. Qxe2 Bf8 29. h3 h6 30. Rd1 Qc6 {Weighted Error Value: White=0.05/Black=0.01} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.05"]
[Round "3.2"]
[White "Socko, Bartosz"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2618"]
[BlackElo "2694"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,97,11,31,-14,-11,-25,3,0,0,0,0,0,0,0,0,0,13,6,7,-24,-16,-40,-45,-42,-38,-42,-51,-37,-4,-16,0,-53,-39,-49,-32,-46,-21,-24,-18,-32,-28,-31,-40,-42,-11,-41,-27,-47,-18,-62,-70,-47,-51,-56,-46,-114,-60,-87,-59,-60,0,0,0,0,0,-6,0,0,0,0,0,0,37,37,139,37,139,139,139,139,139,139,139,139,139,139,139,139]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 $1 {6...e5 scores better than 6...e6.} 7. Nde2 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Be6 8. Be3 Nc6 {[%cal Bb8c6,Bc6e7,Be7f5,Bf5d4][%mdl 32]} 9. Nd5 {The position is equal.} Bxd5 10. exd5 Qa5+ 11. Nc3 Ne7 {[%cal Re7d5]} 12. Bc4 {[#]} g6 $146 ({Predecessor:} 12... b5 13. Bb3 b4 14. Ne4 Nexd5 15. Nxf6+ Nxf6 16. O-O Be7 {0-1 (54) Degrave,J (1961)-Giffard,N (2337) Nancy 2013}) 13. O-O Bg7 14. Qd3 O-O 15. b4 Qc7 {[#] aiming for ...Rac8.} (15... Qxb4 $2 16. Rab1 $18) 16. Bb3 Nf5 {Hoping for ...e4!} 17. Bf2 Nd4 18. Ne2 Nxe2+ 19. Qxe2 e4 20. c4 a5 21. bxa5 (21. c5 $11) 21... exf3 22. Qxf3 Nd7 23. Rae1 Nc5 24. Bh4 Rae8 25. Rxe8 Rxe8 26. Re1 Be5 {[%mdl 1024] Black has compensation.} 27. Rf1 Bd4+ 28. Kh1 Re3 29. Qd1 {[%cal Rd1d4]} Re4 30. Bg5 Be5 31. Qf3 f5 32. Be3 {Black should prevent Bc2.} Qe7 {Strongly threatening ...Bxh2!} 33. g3 (33. Bg1 $15) 33... Bd4 (33... Nxb3 $17 34. axb3 {[#]} Bxg3 $1) 34. Bf4 $15 Re1 {( -> ...Rxf1+)} 35. Bc2 Rxf1+ (35... Qe2 $1 $15 36. Qxe2 Rxe2) 36. Qxf1 $11 Bc3 37. h4 Bxa5 38. Qf3 Bb6 39. Kg2 Nd7 40. g4 Ne5 41. Bxe5 Qxe5 (41... dxe5 {keeps more tension.} 42. gxf5 Qxh4 43. fxg6 Qg5+ 44. Kh3 hxg6 45. d6 Qh6+) 42. gxf5 Qe3 (42... Qe1 $14 43. fxg6 hxg6) 43. fxg6 (43. Qxe3 $16 {White threatens Qe6+ and mate.} Bxe3 44. Kf3 (44. fxg6 hxg6 45. Kf3 Bd2 $16)) 43... hxg6 (43... Qg1+ $14 44. Kh3 hxg6) 44. Qxe3 $16 {White is clearly better.} Bxe3 45. Bxg6 {KB-KB} Kg7 46. Bf5 b6 47. Kf3 Bc5 48. Kg4 Kh6 49. Be6 {Weighted Error Value: White=0.15/Black=0.18} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.05"]
[Round "3.2"]
[White "Teclaf, Pawel"]
[Black "Moranda, Wojciech"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2502"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,73,33,40,35,42,25,25,9,17,0,-15,-8,34,14,15,0,47,4,4,0,0,0,0,0,0,-33,0,-15,-9,-16,-14,-14,0,0,0,0,0,8,26,20,112,104,111,73,79,43,53,31,104,104,114,97,108,77,95,95,132,30,25,7,13,11]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 g6 6. Nf3 Nf6 {6...Bf5 is a critical line.} 7. Bf4 Bf5 8. Bxf5 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack.} gxf5 9. O-O e6 10. Re1 {White has an edge.} Rg8 11. Nbd2 Nh5 12. Be5 {[#]} Be7 $146 (12... Qe7 {is interesting.} 13. Bg3 Nxg3 14. hxg3 Qc7 15. Qe2 f4) ({Predecessor:} 12... Qe7 13. Bg3 Nxg3 14. hxg3 O-O-O 15. b4 Kb8 16. Nb3 Qc7 17. Rb1 Bd6 18. Qd3 Rg7 {0-1 (54) Sherwood,R (1796)-Egorov,V (2020) LSS email 2011}) 13. Nf1 Kf8 14. Ng3 Nxg3 15. hxg3 Nxe5 16. Nxe5 Bf6 17. Qd2 Bxe5 18. Rxe5 Rc8 19. a4 Rg6 20. a5 Kg7 21. Ree1 h5 22. Qf4 Kh7 23. f3 Qd7 24. Kf2 Rcg8 25. Rh1 Rh6 26. Rh3 f6 (26... Qb5 $11 {keeps the balance.} 27. Qd2 Kg7) 27. Rah1 $16 Rg5 28. Qe3 Kg6 29. Qe2 Rh8 30. g4 Qd6 ({Black should try} 30... fxg4 $14 31. fxg4 Qd6) 31. gxf5+ Rxf5 32. g4 Rg5 33. Qe3 Rh7 34. Ke1 f5 35. gxh5+ (35. Rg1 $16 Qe7 36. Rxh5 Rhxh5 37. gxh5+ Kxh5 38. Rh1+ Kg6 39. Rh8) 35... Rgxh5 $11 36. Rg1+ Kf7 37. Rxh5 {[%mdl 32768] Weighted Error Value: White=0.20/Black=0.16. Loss on time!?} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.05"]
[Round "3.3"]
[White "Moranda, Wojciech"]
[Black "Teclaf, Pawel"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "2618"]
[BlackElo "2502"]
[Annotator "RC"]
[PlyCount "51"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "900+10"]

1. d4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} c5 {[%emt 0:00:00]} 3. c4 cxd4 {[%emt 0:00:00]} 4. Nxd4 {[%emt 0:00:01]} a6 {[%emt 0:00:00]} 5. Nc3 {[%emt 0:00:03]} Nf6 {[%emt 0:00:00]} 6. g3 {[%emt 0:00:01]} Qc7 {[%emt 0:00:00]} 7. Bg2 {[%emt 0:00:02]} Qxc4 {[%emt 0:00:19]} 8. O-O {[%emt 0:00:02]} Nc6 {[%emt 0:00:56]} 9. Nb3 {[%emt 0:00:05]} Be7 {[%emt 0:01:05]} 10. e4 {[%emt 0:00:35]} Qb4 {[%emt 0:00:32]} 11. Bf4 {[%emt 0:02:01]} d6 {[%emt 0:01:35]} 12. Be3 {[%emt 0:00:37]} Ne5 {[%emt 0:01:48]} 13. a3 {[%emt 0:00:23]} Qc4 {[%emt 0:00:02]} 14. Rc1 {[%emt 0:00:04]} Qd3 {[%emt 0:00:01]} 15. Nd2 {[%emt 0:01:10]} Nfg4 {[%emt 0:01:41]} 16. Bb6 {[%emt 0:00:30]} Bg5 {[%emt 0:01:42]} 17. f4 {[%emt 0:03:57]} Ne3 {[%emt 0:00:03]} 18. Bxe3 {[%emt 0:00:13]} Qxe3+ {[%emt 0:00:01]} 19. Kh1 {[%emt 0:00:03]} Bh6 {[%emt 0:00:32]} 20. Rc2 {[%emt 0:01:30]} Nd3 {[%emt 0:03:07]} 21. Ndb1 {[%emt 0:00:02]} Bxf4 {[%emt 0:04:00]} 22. gxf4 {[%emt 0:00:18]} Nxf4 {[%emt 0:00:01]} 23. Qxd6 {[%emt 0:00:13]} Nxg2 {[%emt 0:00:25]} 24. Rxg2 {[%emt 0:00:12]} Bd7 {[%emt 0:00:02]} 25. Nd2 {[%emt 0:00:24]} Rc8 {[%emt 0:00:10]} 26. Rxf7 {[%emt 0:00:32]} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.05"]
[Round "3.4"]
[White "Teclaf, Pawel"]
[Black "Moranda, Wojciech"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "2502"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,118,14,17,17,27,8,3,4,18,0,-11,-24,-10,-46,0,0,41,38,45,34,48,49,65,62,77,75,83,78,81,83,88,91,93,54,72,71,80,83,93,0,0,0,0,-52,0,0,49,49,49,39,50,50,50,50,50,50,50,50,50,50,50,51,61,61,72,72,80,80,83,80,93,93,93,83,93,86,84,83,93,76,76,76,76,89,84,56,67,56,54,54,56,56,60,31,43,38,38,14,18,14,40,39,76,38,38,38,38,45,45,-454,-445]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. c3 Bg4 6. Ne2 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack.} e6 {6...Nc6 gains popularity.} 7. O-O Bd6 8. Qe1 {The position is equal.} Bh5 9. f4 {[#]} O-O $146 ({Predecessor:} 9... Qc7 10. Ng3 Nbd7 11. Nxh5 Nxh5 12. g3 O-O 13. Nd2 Rfe8 14. Qe2 g6 15. Nf3 Nb6 {1-0 (41) Zierk,S (2499)-Postny,E (2600) Chess.com INT 2020}) 10. Ng3 Bg6 11. f5 exf5 (11... Bxg3 $5 12. Qxg3 exf5 $15) 12. Nxf5 Nc6 13. Bg5 Re8 14. Qh4 {Hoping for Nxg7!} Re6 15. Nd2 Bf8 16. Rae1 Rxe1 17. Rxe1 Qd7 18. Qh3 Re8 19. Rf1 {Black must now prevent Bxf6.} Qe6 20. Bxf6 gxf6 21. Nf3 {[%cal Bd2f3,Bf3h4,Bh4f5,Bf5d6][%mdl 32]} Ne7 {[%cal Re7f5]} 22. N3h4 Nxf5 23. Nxf5 Qb6 {[#]} 24. b3 ({White should try} 24. Rb1 $1 $16) 24... Qc7 $11 25. c4 Qa5 26. Qg3 ({White should play} 26. Bb1 $11) 26... dxc4 (26... Qxa2 $15 27. Bb1 (27. cxd5 Qxb3 28. d6 Qc3 $15) 27... Qa5) 27. Bxc4 Kh8 28. Nd6 Re7 29. Qf4 Qc7 30. Qxf6+ Bg7 31. Qf4 Rd7 32. Nxf7+ Bxf7 33. Qxc7 {White threatens Qc8+ and mate.} Bxd4+ 34. Kh1 Rxc7 35. Bxf7 $14 {[%mdl 4096] Endgame KRB-KRB} Kg7 36. Bc4 Bf6 37. Rd1 Re7 38. g3 b6 39. Kg2 Rc7 40. a4 Re7 41. h4 Rc7 42. Kh3 Re7 43. Rd3 Be5 44. Rd8 Bc7 45. Ra8 Bd6 46. Rg8+ Kf6 47. g4 h6 48. Rd8 Re3+ 49. Kg2 Ke7 50. Rg8 Kf6 51. Kf2 Rh3 52. h5 {Rg6+ is the strong threat.} Bf4 $1 53. Rf8+ Kg5 54. Be6 Bd6 (54... Rh2+ {seems wilder.} 55. Ke1 Be3 56. Rf3 Bf4 57. Rd3 Kh4) 55. Rf5+ Kh4 56. Rf6 (56. g5 $5 {[%cal Rg5h6]} Rh2+ 57. Kg1 Kxh5 58. Bf7+ Kg4 {[#]} 59. g6 $1 Kxf5 60. g7 $16) 56... Bc5+ 57. Ke2 Be3 58. Rf7 {aiming for g5.} Bg5 {Strongly threatening ...Re3+.} 59. Rxa7 $2 {[%mdl 8192]} (59. Rf3 $14 {keeps the upper hand.}) 59... Re3+ {[%mdl 32832] Double Attack.  Weighted Error Value: White=0.23/Black=0.08. An unexpected result.} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.06"]
[Round "4.1"]
[White "Moranda, Wojciech"]
[Black "Wojtaszek, Radoslaw"]
[Result "1-0"]
[ECO "C78"]
[WhiteElo "2618"]
[BlackElo "2694"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,101,54,42,39,47,37,52,53,55,55,53,65,76,64,67,67,74,66,68,66,63,57,58,52,65,79,30,55,30,30,30,61,37,38,54,79,78,83,83,83,83,83,78,83,79,256,250,462,449,462,462,450,461,418,426,545,537,581,531,726,722,766,758,665,737,700,671,730,716,788,745,1533,1446,29966,29967,29966,29964,29967,29966,29969,29970,29975,29976,29976,29977,29976,29978,29976,29976,29966,-29982]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 b5 7. Bc2 d5 {C78: Ruy Lopez: Archangelsk and Möller Defences.} 8. a4 dxe4 9. axb5 $1 Bg4 {[%mdl 64] Pin. White is slightly better.} 10. bxc6 exf3 11. gxf3 Bh3 {is cutting edge theory.} 12. Re1 O-O 13. Ra5 $1 {[%cal Ra5c5]} Qd6 14. b4 Bxf2+ 15. Kxf2 e4 16. Kg1 Rae8 $1 17. Re3 {[%cal Rf3e4]} (17. Rxa6 exf3 18. Rf1 Re2 19. Rf2 Rxf2 20. Kxf2 Re8 21. Qg1 Ng4+ 22. Kxf3 Nxh2+ 23. Qxh2 Qxh2 24. Bxh7+ Kxh7 25. d4 Qg2+ 26. Kf4 g5#) 17... Nh5 $1 18. Rg5 (18. Rxh5 {leads to mate.} Qg6+ 19. Rg5 Qxg5+ 20. Kf2 Qg2+ 21. Ke1 Qf1#) (18. Rxe4 f5 $19) 18... Qh6 19. f4 (19. Rg3 $5 Nxg3 20. hxg3 $14) 19... Nxf4 {[#]} 20. Reg3 $146 ({Predecessor:} 20. Rgg3 f5 21. Qe1 Bg4 22. d4 Nh3+ 23. Kh1 Qh5 24. Nd2 Ng5 25. Qg1 h6 26. Re1 {0-1 (42) Ikeda,J (2452)-Kuybokarov,T (2543) Canberra 2021}) 20... f5 $1 21. Rxg7+ Qxg7 22. Rxg7+ Kxg7 23. Qe1 e3 24. dxe3 ({Wrong is} 24. Qg3+ $2 Kh8 $19) 24... Rf6 {Threatens to win with ...Rg6+.} 25. Kf2 Rg6 {aiming for ...Rg2+.} 26. Nd2 Rg2+ 27. Kf3 Ng6 {( -> ...Ne5+)} 28. e4 {Black must now prevent Qh1.} Ne5+ $2 {Loses the game.} (28... f4 $16 {keeps fighting.}) 29. Ke3 $18 f4+ $2 (29... Rd8 30. exf5 Re8) 30. Kxf4 ({And not} 30. Kd4 Rxd2+ $1 31. Qxd2 Nf3+ 32. Kc5 Nxd2 $17) 30... Ng4 {[#] ...Rf8+ is the strong threat.} 31. e5 $1 Nxe5 32. Qxe5+ Rxe5 33. Kxe5 Rxh2 34. Be4 Re2 35. Nf3 Bg2 {Strongly threatening ...Bxf3.} 36. Kd4 Rf2 37. Ng5 Bxe4 38. Nxe4 Rf1 39. Bg5 Kg6 40. Be7 h5 41. Nc5 a5 42. bxa5 {[%cal Bb4a5,Ba5a6][%mdl 32]} h4 43. Bxh4 {White mates.} Rf4+ 44. Kd5 Rxh4 {[%mdl 4096] Endgame KR-KN} 45. a6 Kf7 46. a7 Rh8 47. Na6 Ra8 48. Nxc7 Rxa7 49. Nb5 Ra5 {[#]} 50. c7 $1 Rxb5+ 51. Ke4 $4 {[%mdl 40960] Weighted Error Value: White=0.02/Black=0.36. Sensor Board Error (Ke4/e5)?} (51. Kc6 {and all is fine.} Rg5 52. c8=Q Rg2 53. Qc7+ Kg6 54. Qf4 Kh5 55. Qf3+ Rg4 {[#]} 56. Qxg4+ $3 {[%mdl 512]} Kxg4 57. c4) 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.06"]
[Round "4.1"]
[White "Socko, Bartosz"]
[Black "Teclaf, Pawel"]
[Result "1/2-1/2"]
[ECO "C07"]
[WhiteElo "2618"]
[BlackElo "2502"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,60,39,25,0,3,0,8,5,5,13,8,8,8,1,12,0,0,0,0,0,0,0,13,15,8,0,34,0,0,0,0,0,0,0,0,-18,-24,-20,-21,-35,0,0,0,-6,0]} 1. d4 e6 2. e4 d5 3. Nd2 c5 4. Ngf3 cxd4 5. Nxd4 Nc6 6. Bb5 Bd7 7. Nxc6 Bxc6 8. Bxc6+ bxc6 9. c4 Bc5 10. cxd5 {C07: French Tarrasch: 3...c5, 4 Ngf3 and 4 exd5 Qxd5.} (10. Qa4 {looks sharper.} Qd7 11. O-O Ne7 12. Nb3 Bb6 13. Bf4) 10... cxd5 11. Qa4+ Qd7 12. Qxd7+ Kxd7 13. exd5 exd5 14. O-O Ne7 15. Nb3 Bb6 16. Bd2 Rhc8 17. Bc3 f6 {[#]} 18. Rfe1 $146 ({Predecessor:} 18. Rfd1 Ke6 19. Kf1 Nf5 20. Rd2 Rd8 21. Re1+ Kf7 22. Red1 Ke6 23. a4 a6 24. g4 {½-½ (30) Spasov,V (2606)-Sedlak,N (2546) Vrsac 2010}) 18... a5 19. Rad1 Rc4 20. Re2 a4 21. Nd2 Rcc8 22. Bb4 Bc5 23. Bxc5 Rxc5 24. Ne4 Rc4 25. Nc3 Ra5 26. g3 a3 {[#] Threatens to win with ...axb2.} 27. Nb1 axb2 28. Rxb2 Rc7 29. Kg2 Ke8 30. Rd3 Rca7 {An uneventful encounter.  Weighted Error Value: White=0.04/Black=0.05} 1/2-1/2

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.07"]
[Round "4.2"]
[White "Wojtaszek, Radoslaw"]
[Black "Moranda, Wojciech"]
[Result "1-0"]
[ECO "E17"]
[WhiteElo "2694"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,91,10,15,27,19,28,27,31,-8,23,-14,16,15,14,10,20,16,40,23,27,26,37,18,46,18,24,0,90,85,85,100,110,108,100,105,101,107,99,105,102,101,102,108,118,124,105,111,128,100,179,188,181,181,166,177,181,182,241,245,297,307,511,511,519,526,522,529,523,517,515,510,512,461,878,858,12842,6307,29985,29986,29984,29981]} 1. Nf3 Nf6 2. g3 b6 3. d4 Bb7 4. c4 e6 5. Bg2 Be7 6. O-O O-O 7. Re1 a5 {7...Na6 is becoming the main line. E17: Queen's Indian: 4 g3 Bb7 5 Bg2 Be7.} 8. Bf4 d6 9. Nc3 Ne4 {White has an edge.} 10. Rc1 Nd7 11. Qd3 {[#]} Nxc3 $146 (11... f5 {is more complex.} 12. Red1 Nxc3 13. Qxc3 Qe8 14. Be3 Qh5) ({Predecessor:} 11... f5 12. Nd2 Nxc3 13. Bxb7 Nxa2 14. Bxa8 Qxa8 15. Qe3 Kf7 16. Rcd1 Nb4 {0-1 (44) Gorozhanin,M (2315)-Makarov,M (2512) St Petersburg 2013}) 12. Rxc3 h6 13. e4 a4 14. Rc2 Ra7 15. Rce2 Qa8 16. h4 Nf6 17. Nh2 Nd7 18. Bh3 Re8 19. Bd2 c5 {[#]} (19... c6 $11) 20. d5 $1 $16 {White now steadily converts the win.} Ne5 {[#]} 21. Qc2 exd5 22. exd5 {Hoping for Bc3.} Ba6 23. Re4 b5 {[%cal Rb5c4]} 24. Bc3 bxc4 25. Bxe5 dxe5 26. Rxe5 {And now d6 would win.} Bb5 27. Ng4 Bd6 28. Rxe8+ Bxe8 29. Ne3 Bb5 30. Bf1 a3 (30... Re7 $16) 31. Bxc4 $18 Bd7 32. bxa3 Rxa3 33. Bb3 Ra6 34. Nc4 Bf8 (34... Qb8 $142) 35. Ne5 Be8 36. Qe4 Ba4 $2 (36... Rd6 {was necessary.} 37. h5 Qc8) 37. Bc4 Rd6 38. h5 Be8 39. Bd3 {[%csl Gd3][%cal Re4h7]} g6 40. Nc4 Rd8 41. hxg6 fxg6 42. Qg4 {aiming for Nb6.} Qc8 (42... h5 $142 43. Qg5 (43. Qe6+ Bf7 $14) 43... Rd7 44. Bxg6 Rg7) 43. Re6 g5 44. Qf5 {[%csl Gd3][%cal Rf5h7]} Qd7 45. Ne5 Qg7 46. Rf6 {Weighted Error Value: White=0.04/Black=0.36} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.07"]
[Round "4.2"]
[White "Teclaf, Pawel"]
[Black "Socko, Bartosz"]
[Result "0-1"]
[ECO "A21"]
[WhiteElo "2502"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,120,-2,-17,-10,16,13,16,13,16,-10,6,-1,16,20,7,12,29,-27,-22,-36,-9,-45,-44,-51,-49,-47,-47,-43,-39,-83,-64,-117,-102,-136,-138,-151,-149,-149,-144,-118,-153,-154,-104,-129,-129,-200,-195,-185,-190,-152,-11,-52,-44,-52,-13,-148,-162,-164,-111,-109,0,0,0,0,83,-75,-75,-75,-75,-74,-74,-73,-74,-74,-72,-81,-19,-12,-11,-68,-66,-201,-89,-93,0,-198,-190,-393,-381,-439,-242,-630,-555,-555,-324,-324,-324,-369,-359,-636,-613,-591,-572,-550,-534,-1132,-1123,-1099,-994,-1052,-1013,-968,-967]} 1. c4 e5 2. Nc3 d6 3. Nf3 f5 4. d4 e4 5. Bg5 Be7 6. Bxe7 {A21: English Opening: 1...e5 2 Nc3.} Nxe7 (6... Qxe7 {is more complex.} 7. Nd2 Nf6 8. e3 c5 9. Be2 Nc6) 7. Nd2 O-O 8. e3 {The position is equal.} c6 9. f4 {[#]} Be6 $146 ({Predecessor:} 9... exf3 10. Nxf3 Nd7 11. Bd3 Nf6 12. O-O d5 13. b3 Kh8 14. Qc2 g6 15. c5 Qc7 {½-½ (28) David,P (2335)-Prymula,R (2305) Hradec Kralove 1988}) 10. g4 d5 11. g5 $1 Nd7 12. Rc1 Bf7 {With the idea ...c5.} 13. c5 (13. cxd5 $142 $1 Nxd5 14. Nxd5 Bxd5 15. Bc4) 13... b6 $11 14. Na4 Qc7 (14... b5 $5 15. Nc3 $8 Qb8 $11) 15. Qe2 Rfb8 $36 {[%mdl 2048] Black has good play.} 16. b3 Nf8 17. Bh3 Ne6 18. O-O Rf8 19. Qf2 Bh5 20. Rfe1 (20. Bg2 $15) 20... Ng6 {[%cal Rg6f4]} 21. Bf1 b5 $1 {[%cal Rb5a4]} 22. Nc3 Ngxf4 23. exf4 Qxf4 24. Qxf4 Nxf4 25. b4 Ne6 {[%cal Bf4e6,Be6g5,Bg5f3][%mdl 32]} 26. Nb3 Nxg5 27. Na5 (27. Bg2 $17 {keeps fighting.}) 27... Nf3+ $19 {[%mdl 64] Double Attack} 28. Kf2 Nxe1 29. Kxe1 Rac8 (29... Be8 $1 $17 {And now ...f4 would win.} 30. Bxb5 cxb5 31. Nxd5 Rd8 32. Ne7+ Kf7 33. Nxf5 Rd5 34. Nd6+ Ke6) 30. Nxc6 Rxc6 31. Nxd5 {Hoping for Ne7+.} Rh6 (31... Kf7 {is interesting.} 32. Bxb5 Rg6 33. Rc3 Bf3 34. c6 a6) 32. c6 {[#]} (32. Ne7+ $1 $11 Kf7 33. Nxf5) 32... f4 $1 $17 33. h3 {[#] Strongly threatening c7.} Rd6 (33... Be8 $1 $19 34. c7 Bd7 35. Ne7+ Kf7) 34. Rc5 Be8 (34... g5 $17 35. c7 Kg7) 35. Bxb5 $11 f3 36. Kf2 a6 (36... g6 $11) 37. Ne7+ $2 (37. Bxa6 $16 {stays on course. Bc4 is the strong threat.} e3+ 38. Nxe3 Bxc6 39. Nf5 Rxf5 40. Rxf5 Rxd4 41. a3) 37... Kf7 $17 38. Nf5 e3+ $1 39. Kxf3 axb5 40. Nxd6+ Ke6+ {[%mdl 64] Discovered Attack} 41. Kxe3 Kxd6 {[%mdl 4096] Endgame KRB-KR} 42. d5 Bg6 (42... Bh5 $17 43. Rxb5 Bf3) 43. Rxb5 $11 Re8+ 44. Kf4 ({Better is} 44. Kd4 $1 $11) 44... Re4+ $15 45. Kg5 (45. Kg3 $15) 45... Re5+ (45... Bf7 $19 {is more deadly.} 46. Rb7 h6+ 47. Kf5 Re5+ 48. Kg4 Rg5+ 49. Kf4 Bxd5 {[%mdl 64] Double Attack}) 46. Kf4 $17 Re4+ (46... Bd3 $17 47. Rb7 Rxd5 48. Rxg7 Kxc6) 47. Kg5 $19 Bf7 {( -> ...Ke5)} 48. Kf5 (48. Rb7 h6+ 49. Kf5 Re5+ 50. Kg4 Bxd5 51. Rxg7) 48... Bxd5 49. Rb6 Rc4 (49... Rd4 $142 50. Rb7 Kxc6 51. Rxg7 Bxa2) 50. b5 $2 (50. Rb7) 50... Be6+ 51. Kg5 Rc5+ {[%mdl 64] Discovered Attack} 52. Kf4 g5+ ({Much less strong is} 52... Bxh3 53. Rb8 $19) 53. Ke4 Bxa2 54. Rb7 $2 (54. Kd4 Rc4+ 55. Ke3) 54... Be6 {Black is clearly winning.} 55. Kd4 Rc4+ 56. Kd3 Rh4 57. c7 {If White can now play Rb6+ this consolidates a bit.} Rxh3+ 58. Kd4 Rh4+ 59. Kd3 Bc8 60. Ra7 Rb4 {Weighted Error Value: White=0.43/Black=0.29} 0-1

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.07"]
[Round "4.4"]
[White "Wojtaszek, Radoslaw"]
[Black "Moranda, Wojciech"]
[Result "1-0"]
[ECO "E17"]
[WhiteElo "2694"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,77,13,12,20,20,19,18,18,0,18,12,21,22,25,0,24,6,23,0,38,35,75,40,53,64,64,38,39,56,62,39,41,40,37,42,36,23,38,6,0,20,177,177,344,337,323,313,338,253,322,338,364,275,552,551,645,629,579,429,400,402,831,817,809,807,966,965]} 1. Nf3 Nf6 2. g3 b6 3. d4 Bb7 4. c4 e6 5. Bg2 Be7 6. O-O O-O 7. Re1 Ne4 {7...Na6 is the modern continuation. E17: Queen's Indian: 4 g3 Bb7 5 Bg2 Be7.} 8. Nfd2 d5 9. cxd5 exd5 {The position is equal.} 10. Nc3 {[%cal Rd2e4]} f5 11. Ndxe4 dxe4 12. Bf4 Nc6 {[%cal Bb8c6,Bc6a5,Ba5c4][%mdl 32]} 13. Qb3+ Kh8 {[#]} 14. d5 $146 ({Predecessor:} 14. Red1 Bd6 15. Bxd6 cxd6 16. d5 Ne5 17. Nb5 Ba6 18. Nd4 Bc4 19. Qe3 Ng4 20. Qa3 {½-½ (44) Mesquita Jr,F (2371)-Sanchez,M (2369) ICCF email 2018}) 14... Na5 15. Qa4 Bd6 16. Bxd6 cxd6 17. Rac1 Rc8 18. Qd4 Ba6 19. f3 Nc4 20. fxe4 f4 21. gxf4 Rxf4 22. Rf1 Rxf1+ 23. Rxf1 Qg5 24. Nd1 {[%cal Bc3d1,Bd1e3,Be3f5][%mdl 32]} Ne5 25. Qf2 {Threatening mate with Qf8+!} h6 26. Ne3 $40 {[%mdl 128] White has some attack.} Qh5 $2 {[#] Black cannot hold the game after this.} (26... Rc7 $11 {and Black is okay.}) 27. Nf5 $1 $18 Qxe2 $2 (27... Rc2) 28. Qxe2 ({Inferior is} 28. Nxd6 Qxf2+ 29. Rxf2 Rc1+ 30. Bf1 Ng4 $11) 28... Bxe2 29. Nxd6 Rc7 30. Rf8+ Kh7 31. Rc8 Rd7 32. Nf5 g6 $2 (32... Bh5 {keeps fighting.} 33. Nd4 Kg6) 33. Nd4 Bh5 34. Re8 Nc4 35. b3 g5 36. Rc8 Ne3 (36... Ne5 $142 37. Nc6 Nxc6) 37. Ne6 {White is clearly winning.} Rf7 38. d6 Bg4 {[#]} 39. d7 $1 {Weighted Error Value: White=0.12/Black=0.39} 1-0

[Event "78th LOTTO POL-ch 2021"]
[Site "Bydgoszcz"]
[Date "2021.05.07"]
[Round "4.4"]
[White "Moranda, Wojciech"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2618"]
[BlackElo "2694"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.04.29"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,91,13,21,4,27,27,34,27,26,29,31,23,31,30,31,24,37,25,49,54,61,61,61,61,61,55,55,55,55,55,55,55,64,61,64,64,64,64,64,45,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. exd5 cxd5 9. O-O O-O 10. Bg5 c6 11. Qf3 h6 12. Bxf6 Qxf6 13. Qxf6 gxf6 14. Ne2 Rb8 15. Nd4 {C47: Scotch Four Knights and Four Knights with 4 g3.} (15. Rab1 {with more complications.} Re8 16. a3 Bd6 17. b4 Bd7 18. Ng3) 15... Rb6 16. Nf5 Bxf5 17. Bxf5 {White is slightly better.} Re8 18. Rad1 Re5 19. Bd3 {[#]} Rb8 $146 ({Predecessor:} 19... a5 20. a4 Bc5 21. b3 Rb4 22. Ba6 f5 23. Rd3 f4 24. Rh3 Kg7 25. Bd3 Be7 {½-½ (39) Gordyk,L (2166)-Eljanov,P (2672) Chess.com INT 2020}) 20. g3 Ba5 21. b3 Rbe8 22. Ba6 Bc3 23. Rd3 d4 24. Rf3 Kg7 25. a4 c5 26. Kg2 Be1 27. h4 R8e6 28. Bc4 Rc6 29. Bd3 a5 30. Rf5 {[#] And now Rxe5 would win.} Rxf5 31. Bxf5 $14 {[%mdl 4096] Endgame KRB-KRB} Bc3 32. Bd3 Re6 33. Rd1 (33. g4 {is interesting.} Re5 34. Kf3 Re8 35. Kg3 Bd2 36. Rg1) 33... Re1 34. Rxe1 {White is better.} Bxe1 $16 {KB-KB} 35. Kf1 Bb4 36. Ke2 Kf8 37. f4 Ke7 38. h5 Ke6 39. Bc4+ Ke7 40. g4 Bc3 41. Kd3 Bb4 42. Ke4 Bd2 43. Kd5 Bb4 44. Bd3 Kf8 45. Kc6 Ke7 46. Bc4 {Weighted Error Value: White=0.02/Black=0.03} 1/2-1/2

