[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.09"]
[Round "1.1"]
[White "Van den Doel, Erik"]
[Black "Vrabec, Milos"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2610"]
[BlackElo "2144"]
[Annotator "TA"]
[PlyCount "141"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,141,13,12,31,43,43,51,83,60,69,50,68,65,70,48,68,58,75,67,80,63,81,93,94,12,63,-59,-27,-64,50,65,44,17,74,72,145,134,158,147,152,156,177,179,173,143,143,143,143,143,143,131,150,150,150,150,143,143,160,160,160,132,168,160,172,172,172,172,172,158,172,158,165,165,172,172,172,165,165,158,172,172,172,165,165,165,165,165,165,165,165,165,165,149,165,145,165,165,140,138,140,131,131,129,176,193,275,275,260,267,233,231,290,261,247,210,340,337,386,386,386,382,358,345,345,338,330,330,328,306,2427,2407,2050,2019]} 1. d4 f5 2. Nc3 Nf6 3. Bg5 d5 4. e3 e6 5. Nf3 Be7 6. Bd3 Nbd7 {A80: Dutch Defence: Unusual White second moves} (6... Ne4 7. Bxe7 Qxe7 8. O-O O-O 9. Ne2 Nd7 10. c4 c6 11. Qc2 Kh8 12. a3 a5 13. Rab1 a4 14. Nc3 Nxc3 15. Qxc3 g5 16. Rbc1 g4 17. Nd2 Nf6 18. Kh1 Bd7 {1-0 (51) Duda,J (2738)-Potapov,P (2516) St Petersburg 2018}) 7. Ne2 Ne4 8. Nf4 Nf8 $146 {White is slightly better.} ({Predecessor:} 8... Nxg5 9. Nxg5 Nf8 10. Nf3 Bd6 11. h4 c6 12. Qe2 Qc7 13. g3 e5 14. dxe5 Bxe5 15. Nxe5 Qxe5 16. O-O-O Bd7 17. c4 dxc4 18. Bxc4 O-O-O 19. Qd3 Ng6 20. Qa3 a6 21. Nd3 {1-0 (21) Mikenas,V-Alexeev,A Kaliningrad 1972}) 9. Bxe7 Qxe7 10. O-O (10. Ne5 {keeps more tension.} g6 11. Bxe4 dxe4 12. d5 exd5 13. Qxd5 g5 14. Nh3) 10... Nd7 11. c4 c6 12. Be2 O-O 13. Rc1 Rf6 14. Nd3 Rh6 15. b4 g5 {White must now prevent ...g4.} 16. g3 g4 17. Nfe1 (17. Nfe5 $16) 17... dxc4 (17... a5 $11) 18. Nc5 ({White has to play} 18. Rxc4 $14 Qe8 19. Rc2) 18... Ndxc5 $15 19. bxc5 c3 (19... b5 $1 $15 20. Bxg4 e5) 20. f3 $14 gxf3 21. Bxf3 Qg5 (21... e5 $1 $11 {keeps the balance.}) 22. Ng2 {[#]} Nf6 (22... e5 $142 $1 {[%mdl 512]}) 23. Rxc3 $16 Nd5 24. Ra3 Qg7 25. Qd2 Bd7 26. Rb1 Bc8 27. Bxd5 exd5 28. Nf4 Qe7 29. Rab3 Rf6 30. Nd3 Rf7 31. Ne5 Rg7 32. Qf2 Qg5 33. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Rc7 34. a5 a6 35. Kh1 Rg7 36. Qf3 h6 37. Qf2 Ra7 38. Qb2 Be6 39. Rf1 Qe7 40. Qg2 Ra8 41. Rfb1 Ra7 42. Kg1 Kh7 43. R1b2 Qc7 44. Rb6 Bc8 45. Qf1 Ra8 46. Kh1 Qe7 47. Qb1 Kg8 48. R6b3 Qc7 49. Qe1 Ra7 50. Rb1 Ra8 51. Qc3 Qe7 52. R3b2 {[%cal Bb3b2,Bb2f2,Bf2f6][%mdl 32]} Qg5 53. Qd3 Qd8 54. Rf1 Qg5 55. Rbf2 Be6 56. Nf3 Qg4 {[#]} 57. Nh4 $1 Qe4+ (57... Qh3 {might work better.} 58. Ng2 (58. Nxf5 Bxf5 59. Qxf5 Qxf5 $16) 58... Qg4) 58. Qxe4 $18 fxe4 59. Rf6 Bh3 60. R1f4 Kh7 61. Rd6 h5 62. Rff6 Re8 (62... Kg8 $142 63. Ng6 Rb8) 63. Ng6 Kg8 64. Nf4 Bg4 65. h3 Bf3+ 66. Kh2 Rh7 67. Ne6 Rf7 68. Rg6+ Kh8 69. Kg1 Rg8 $2 (69... Rb8 70. Ng5 Rg7 71. Nxf3 exf3 72. Rh6+ Kg8) 70. Rxg8+ Kxg8 71. Rd8+ {Accuracy: White = 61%, Black = 37%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.09"]
[Round "1.2"]
[White "Splichal, Stanislav"]
[Black "Sedlak, Nikola"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2142"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,62,15,22,16,44,44,60,50,73,28,46,-6,-6,0,0,-17,-14,-36,0,0,0,0,16,-7,-7,-5,-4,-13,-6,-8,-1,-12,-8,-14,0,0,53,45,85,0,0,-11,-11,-11,-9,-88,-85,-132,-124]} 1. Nf3 e6 2. c4 b6 3. g3 Bb7 4. Bg2 Nf6 5. O-O g6 6. Nc3 Bg7 7. d4 Ne4 8. Nxe4 Bxe4 9. Bg5 {A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6)} (9. Ne5 Bxg2 10. Kxg2 c5 11. Be3 Bxe5 12. dxe5 Qc7 13. Bd2 Nc6 14. Bc3 O-O-O 15. f4 h5 16. e3 g5 {0-1 (39) Fedoseev,V (2731)-Rodshtein,M (2695) Tbilisi 2017}) 9... Qc8 10. Qd2 h6 11. Be3 {White is slightly better.} Nc6 {[%cal Bb8c6,Bc6e7,Be7f5,Bf5e3][%mdl 32]} 12. Rac1 $146 (12. d5 $5 {[%cal Rd5c6]} Bxf3 13. exf3 $16 (13. Bxf3 Ne5 $14)) ({Predecessor:} 12. d5 Ne7 13. Bd4 f6 14. dxe6 dxe6 15. Rfd1 O-O 16. Bc3 Rd8 17. Qe3 Rxd1+ 18. Rxd1 Bc6 19. Qd3 {½-½ (19) Lalic,B (2436)-Jakubowski,K (2557) Pardubice 2016}) 12... Ne7 13. Ne1 ({White should try} 13. d5 $14) 13... Bxg2 $11 14. Nxg2 Nf5 15. d5 c5 16. dxc6 Qxc6 17. Rfd1 O-O 18. b3 Rfd8 19. g4 (19. Bf4 {with more complications.} e5 20. Be3 h5 21. Ne1 Qe6 22. Nc2) 19... Nxe3 20. Qxe3 Rac8 {[%cal Ba8c8,Bc8c7,Bc7e7,Be7e4][%mdl 32]} 21. Ne1 Qb7 22. Nf3 Rc7 23. h4 Rdc8 24. Qf4 Qa6 25. Rc2 d5 (25... Qb7 $11) 26. Rcd2 $1 $14 Re7 {[#]} 27. g5 (27. h5 $1 $16) 27... h5 $1 $11 28. cxd5 exd5 29. Rxd5 Qxa2 30. Nd4 (30. Rd8+ $11 Re8 31. Rxe8+ Rxe8 32. Qc4) 30... Rce8 $17 31. e3 Re4 {Accuracy: White = 38%, Black = 68%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.09"]
[Round "1.3"]
[White "Zubov, Alexander"]
[Black "Haase, Pavel"]
[Result "1-0"]
[ECO "D80"]
[WhiteElo "2605"]
[BlackElo "2137"]
[Annotator "ChessBase"]
[PlyCount "63"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:06]} g6 {[%emt 0:00:00]} 3. Nc3 {[%emt 0:00:26]} d5 {[%emt 0:00:55]} 4. e3 {[%emt 0:02:48]} Bg7 {[%emt 0:00:51]} 5. Qb3 {[%emt 0:00:44]} c6 {[%emt 0:03:25]} 6. Nf3 {[%emt 0:00:07]} O-O {[%emt 0:00:28]} 7. Be2 {[%emt 0:00:20]} b6 {[%emt 0:03:35]} 8. O-O {[%emt 0:01:00]} Ba6 {[%emt 0:01:57]} 9. Rd1 {[%emt 0:04:16]} Qc7 {[%emt 0:02:38]} 10. a4 {[%emt 0:08:43]} Nbd7 {[%emt 0:05:19]} 11. Bd2 {[%emt 0:10:28]} e5 {[%emt 0:06:27]} 12. Rac1 {[%emt 0:09:38]} exd4 {[%emt 0:07:15]} 13. exd4 {[%emt 0:00:41]} Ne4 {[%emt 0:05:17]} 14. cxd5 {[%emt 0:03:46]} Nxc3 {[%emt 0:00:52]} 15. Bxa6 {[%emt 0:00:05]} Nxd1 {[%emt 0:00:16]} 16. dxc6 {[%emt 0:00:08]} Nc5 {[%emt 0:06:19]} 17. dxc5 {[%emt 0:00:47]} Nxb2 {[%emt 0:00:18]} 18. Bc3 {[%emt 0:03:25]} Bxc3 {[%emt 0:00:59]} 19. Rxc3 {[%emt 0:00:06]} bxc5 {[%emt 0:07:37]} 20. Qxb2 {[%emt 0:00:47]} Qxc6 {[%emt 0:01:26]} 21. Bb5 {[%emt 0:01:10]} Qf6 {[%emt 0:02:00]} 22. Qc2 {[%emt 0:01:26]} Rad8 {[%emt 0:02:31]} 23. g3 {[%emt 0:04:00]} Rd5 {[%emt 0:09:18]} 24. Kg2 {[%emt 0:00:28]} Rf5 {[%emt 0:02:26]} 25. h4 {[%emt 0:03:34]} h6 {[%emt 0:03:26]} 26. Re3 {[%emt 0:00:36]} Kg7 {[%emt 0:02:27]} 27. Bd3 {[%emt 0:08:06]} Rd5 {[%emt 0:00:52]} 28. Be4 {[%emt 0:01:36]} Rd6 {[%emt 0:02:14]} 29. Qxc5 {[%emt 0:00:19]} Ra6 {[%emt 0:00:50]} 30. Ne5 {[%emt 0:11:24]} Qd6 {[%emt 0:04:22]} 31. Qc3 {[%emt 0:02:06]} Kh7 {[%emt 0:00:42]} 32. h5 {[%emt 0:02:07]} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.09"]
[Round "1.4"]
[White "Burnett, Andrew"]
[Black "Bernadskiy, Vitaliy"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2134"]
[BlackElo "2581"]
[Annotator "RC"]
[PlyCount "84"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} g6 {[%emt 0:01:52]} 2. e4 {[%emt 0:00:00]} Bg7 {[%emt 0:00:04]} 3. Nc3 {[%emt 0:00:29]} a6 {[%emt 0:00:03]} 4. Be3 {[%emt 0:00:23]} b5 {[%emt 0:00:13]} 5. Bd3 {[%emt 0:00:55]} d6 {[%emt 0:00:32]} 6. Qd2 {[%emt 0:00:42]} Nd7 {[%emt 0:00:26]} 7. a4 {[%emt 0:00:58]} b4 {[%emt 0:00:10]} 8. Nce2 {[%emt 0:00:27]} c5 {[%emt 0:00:44]} 9. Nf3 {[%emt 0:05:21]} Qc7 {[%emt 0:00:20]} 10. Nf4 {[%emt 0:11:38]} Ngf6 {[%emt 0:01:09]} 11. Nd5 {[%emt 0:10:23]} Nxd5 {[%emt 0:00:22]} 12. exd5 {[%emt 0:00:07]} c4 {[%emt 0:01:10]} 13. Be2 {[%emt 0:03:58]} c3 {[%emt 0:00:07]} 14. bxc3 {[%emt 0:00:34]} bxc3 {[%emt 0:00:05]} 15. Qc1 {[%emt 0:02:08]} h6 {[%emt 0:00:27]} 16. Ng1 {[%emt 0:11:18]} Nf6 {[%emt 0:01:01]} 17. Bf3 {[%emt 0:00:19]} Bb7 {[%emt 0:02:12]} 18. Ne2 {[%emt 0:00:43]} Bxd5 {[%emt 0:00:24]} 19. Bxd5 {[%emt 0:01:02]} Nxd5 {[%emt 0:00:04]} 20. O-O {[%emt 0:00:34]} Rc8 {[%emt 0:00:18]} 21. Rd1 {[%emt 0:02:20]} Qa5 {[%emt 0:03:35]} 22. Ra3 {[%emt 0:04:20]} Rc4 {[%emt 0:01:23]} 23. Rd3 {[%emt 0:04:03]} Rxa4 {[%emt 0:02:21]} 24. Rxa4 {[%emt 0:00:17]} Qxa4 {[%emt 0:00:03]} 25. Nxc3 {[%emt 0:01:18]} Nxc3 {[%emt 0:00:06]} 26. Rxc3 {[%emt 0:00:07]} O-O {[%emt 0:00:21]} 27. Qa3 {[%emt 0:02:38]} Qxa3 {[%emt 0:02:05]} 28. Rxa3 {[%emt 0:00:09]} f5 {[%emt 0:00:55]} 29. f3 {[%emt 0:04:07]} f4 {[%emt 0:03:55]} 30. Bf2 {[%emt 0:02:48]} Rc8 {[%emt 0:00:05]} 31. c3 {[%emt 0:01:18]} a5 {[%emt 0:00:17]} 32. Kf1 {[%emt 0:00:28]} a4 {[%emt 0:01:35]} 33. Rxa4 {[%emt 0:03:49]} Rxc3 {[%emt 0:00:05]} 34. Ke2 {[%emt 0:01:35]} Rc2+ {[%emt 0:00:06]} 35. Ke1 {[%emt 0:00:20]} Kf7 {[%emt 0:00:10]} 36. g3 {[%emt 0:00:43]} Rc1+ {[%emt 0:01:19]} 37. Ke2 {[%emt 0:00:27]} Rh1 {[%emt 0:00:26]} 38. d5 {[%emt 0:00:34]} Be5 {[%emt 0:00:32]} 39. gxf4 {[%emt 0:00:28]} Bf6 {[%emt 0:00:03]} 40. Bg3 {[%emt 0:03:27]} h5 {[%emt 0:00:06]} 41. Bf2 {[%emt 0:35:25]} h4 {[%emt 0:31:23]} 42. f5 {[%emt 0:01:39]} g5 {[%emt 0:03:11]} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.09"]
[Round "1.5"]
[White "Vorobiov, Evgeny E."]
[Black "Galicek, Stanislav"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2566"]
[BlackElo "2133"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,63,19,23,16,23,38,33,92,89,123,99,92,97,150,141,124,147,160,161,204,156,158,162,160,160,156,128,209,119,120,124,124,116,273,272,264,275,264,274,275,225,237,237,239,185,1037,1029,1132,1103,985,948]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nxc3 7. Bxc3 c5 8. d5 Bxc3+ {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3} (8... O-O 9. Qd2 e6 10. Bc4 exd5 11. Bxd5 Nd7 12. Bxg7 Kxg7 13. Ne2 Nb6 14. Nc3 Be6 15. O-O-O Qf6 16. h4 Bxd5 17. Nxd5 Nxd5 18. exd5 {½-½ (44) Tomashevsky,E (2701)-Kasimdzhanov,R (2706) Baku 2014}) 9. bxc3 Qa5 10. Qd2 b5 (10... e6 $14) 11. Nf3 b4 $146 ({Predecessor:} 11... O-O 12. h4 h5 13. Ne5 Kg7 14. Bd3 c4 15. Bc2 Qb6 16. g4 {0-1 (37) Watorek,M (2124)-Wozniak,M (2169) Chotowa 2014}) 12. cxb4 Qxb4 13. Bd3 $36 {[%mdl 2048] White is really pushing.} Ba6 (13... O-O $142) 14. Rb1 $16 Qxd2+ 15. Kxd2 c4 16. Bc2 e6 17. Ba4+ Ke7 18. Kc3 exd5 19. exd5 Rd8 20. Rhd1 Kf6 {[#]} (20... Nd7 $16) 21. Nd2 (21. Rd4 $1 $18) 21... Nd7 22. Ne4+ ({Don't play} 22. Nxc4 $6 Bxc4 23. Bxd7 (23. Kxc4 Nb6+ {[%mdl 64] Double Attack} 24. Kb5 Rab8 $11) 23... Rxd7 $11) 22... Kg7 23. Bc6 Rab8 $2 (23... Rac8 $16) 24. Bxd7 $18 Rxb1 25. Rxb1 Rxd7 {[%mdl 4096] Endgame KRB-KRN} 26. Nc5 Rd6 27. Rb8 g5 28. a4 g4 29. Ra8 Rf6 $2 {[#]} (29... Rxd5 30. Nxa6 Ra5) 30. Rxa7 {White is clearly winning.} Bc8 31. Rc7 Bf5 32. Rc6 {Accuracy: White = 86%, Black = 31%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.09"]
[Round "1.6"]
[White "Dette, Jan"]
[Black "Stefansson, Hannes"]
[Result "0-1"]
[ECO "B44"]
[WhiteElo "2128"]
[BlackElo "2523"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,112,20,0,0,0,0,0,23,0,-7,-20,-25,-28,-2,-62,-34,-42,-37,-75,-53,-35,-32,-41,-39,-41,2,10,79,31,18,8,34,-21,23,-43,-50,-81,-78,-82,-68,-106,-105,-127,-119,-190,-162,-190,-175,-173,-183,-182,-181,-175,-183,-169,-166,-172,-173,-193,-196,-185,-199,-184,-177,-222,-229,-189,-170,-187,-187,-177,-171,-314,-308,-387,-377,-504,-496,-570,-593,-644,-639,-631,-630,-754,-723,-721,-718,-1035,-1044,-1022,-934,-860,-823,-29966,-29965,-29968,-29968,-12833,-12833,-29960,-5620,-5226,-4610]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Be2 Nf6 6. Bf3 Qb6 {B44: Sicilian: Taimanov: 5 Nb5} 7. Nb3 Qc7 (7... d6 8. O-O Be7 9. Na3 Ne5 10. Bg5 h6 11. Bf4 Bd7 12. c4 O-O 13. Be2 Ba4 14. Be3 {½-½ (61) Lukiyanchuk,V (2331)-Grinev,V (2401) Omelnyk 2017}) 8. Nc3 $146 ({Predecessor:} 8. O-O Ne5 9. Nc3 a6 10. Be2 d6 11. a4 b6 12. f4 Ned7 13. Bf3 Bb7 {0-1 (29) Schloessner,H (2115)-Kauch,M (2270) Bruchkoebel 2002}) 8... a6 {The position is equal.} 9. a4 b6 10. Be3 Bb7 11. O-O Bb4 12. Ne2 (12. a5 $1 $11 bxa5 13. Nc5) 12... Bd6 13. Kh1 Ne5 14. Bf4 Nxe4 15. Bxe4 Bxe4 16. Qd4 $1 {[%cal Rd4e4]} Bd5 $1 ({Worse is} 16... Bxc2 17. Rac1 $16) 17. Nc3 $1 {[%cal Rc3d5]} Bc6 (17... Bxb3 $5 18. cxb3 f6 $15) 18. Rad1 Ke7 (18... g5 $1 $11 {keeps the balance.}) 19. Ne4 Bxe4 $1 20. Qxe4 {Black must now prevent Rd4.} f6 21. Rfe1 (21. Nd4 $14) 21... Rad8 22. Re2 (22. Nd4 $11) 22... Qc6 $15 23. Qd4 Bb8 24. Qb4+ {[#]} Kf7 $1 25. a5 b5 26. Qc5 Rhe8 27. Red2 (27. Bxe5 $17 {might work better.} Bxe5 28. c3) 27... d5 28. Bxe5 Qxc5 29. Nxc5 {[#] And now Bxb8 would win.} Bxe5 30. c3 Bd6 31. Nb7 Rd7 32. Nxd6+ Rxd6 $19 {[%mdl 4096] Endgame KRR-KRR} 33. f4 h5 34. Kg1 Kg6 35. Kf2 Rc8 36. Kf3 Rc4 37. g3 Rdc6 38. Rd4 Rxd4 39. Rxd4 {KR-KR} Rc4 40. Rd3 b4 41. cxb4 (41. b3 {is the only way for White.} Rc5 42. cxb4) 41... Rxb4 42. Rc3 Rxb2 43. Rc6 Kf5 44. Rxa6 Rxh2 45. Ra7 g6 46. a6 Ra2 47. Ra8 Ra3+ 48. Kf2 e5 49. a7 exf4 50. gxf4 h4 51. Kg2 Kxf4 52. Rg8 Rxa7 53. Rxg6 Ra2+ 54. Kh3 f5 55. Rg8 d4 56. Rd8 Ke5 {Accuracy: White = 32%, Black = 74%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "2.1"]
[White "Rudolf, Michal"]
[Black "Van den Doel, Erik"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2334"]
[BlackElo "2610"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,70,39,50,0,0,0,0,0,0,-4,-3,-16,-7,-3,7,22,0,0,55,57,35,53,53,0,0,-11,47,39,40,37,90,12,16,0,0,0,0,0,0,0,0,-108,-109,-109,-110,-110,-110,-112,-120,-1048,-987]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. Re1 d6 7. a4 Na5 8. Ba2 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack} c5 9. c3 Nc6 10. Na3 a6 11. h3 (11. Bd2 Rb8 12. Nc2 Be6 13. Bxe6 fxe6 14. b4 b5 15. Qe2 Qd7 {½-½ (54) Duda,J (2707)-Naiditsch,A (2710) Linares 2017}) 11... h6 {LiveBook: 8 Games} 12. d4 exd4 $146 ({Predecessor:} 12... cxd4 13. cxd4 Nd7 14. Nc2 a5 15. Bc4 Bf6 {1-0 (28) Fontaine,Q (2313)-Sadkowsky,D (2235) Charleroi 2018}) 13. cxd4 d5 14. exd5 Nxd5 15. dxc5 Ndb4 16. Be3 Nxa2 17. Rxa2 Nb4 18. Ra1 Nd3 19. Re2 Nxc5 20. Qc2 $1 Qd5 21. Nc4 {Nb6 is the strong threat.} Qh5 22. Nd4 (22. Nce5 $1 $14 Ne6 23. Rd1) 22... Be6 $1 $11 23. b4 Nd7 (23... Bxc4 $11 24. Qxc4 b5) 24. Nxe6 $14 fxe6 25. Rd1 Nf6 {[#]} ({Better is} 25... Rad8 $14) 26. Nb6 (26. Bd4 $1 $16) 26... Rad8 $11 27. Rxd8 Rxd8 28. Rd2 Rxd2 29. Qxd2 Qf5 30. Qb2 Qd3 31. Bc5 (31. b5 $11) 31... Qd1+ $17 32. Kh2 Bd6+ 33. g3 {[#]} Bxc5 $1 34. bxc5 Ne4 {Threatens to win with ...Qf1.} 35. Kg2 $2 {[%mdl 8192]} (35. Qa2 $17 Kh8 36. Nc4) 35... Nd2 {Precision: White = 27%, Black = 71%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "2.2"]
[White "Sedlak, Nikola"]
[Black "Skomorokhin, Roman"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2605"]
[BlackElo "2323"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,59,-2,21,0,0,0,0,-4,24,37,37,19,43,0,0,0,0,0,73,66,63,75,52,79,72,63,107,105,158,39,34,42,57,50,70,67,72,83,121,111,163,170,219,218,473,474,437,392,377,377,673,560]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 e6 4. e3 Bd6 5. Bg3 c5 6. Bb5+ {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} Nc6 7. c3 O-O 8. Nbd2 {The position is equal.} Qc7 (8... cxd4 9. exd4 Ne7 10. Bd3 Ng6 11. O-O Bxg3 12. fxg3 b5 13. Qe2 Qb6 14. Ng5 b4 15. Ndf3 h6 {½-½ (34) Naroditsky,D (2616)-Mamedyarov,S (2817) chess.com INT 2019}) 9. dxc5 Bxg3 10. hxg3 e5 11. e4 $146 ({Predecessor:} 11. Qc2 e4 12. Nd4 Ne5 13. f3 Bd7 14. Be2 Rfe8 15. O-O-O Qxc5 {½-½ (29) Ni,H (2697)-Tari,A (2556) Caleta 2016}) 11... dxe4 12. Ng5 $1 {[%cal Rg5h7] Hoping for Nxh7!} e3 13. fxe3 {Threatens to win with Nxh7!} Ne7 (13... Bf5 $11 {keeps the balance.}) 14. Nde4 $16 Nxe4 15. Nxe4 Bf5 16. Qd6 Rac8 {[#]} 17. Bd3 $1 Bxe4 18. Bxe4 f5 {[#]} (18... Rfd8 $142 19. Bxh7+ Kf8 20. Qxc7 Rxc7) 19. Bd5+ (19. O-O-O $1 $16 Rf6 20. Qxc7 Rxc7 21. Bc2) 19... Nxd5 $14 20. Qxd5+ Kh8 21. O-O-O Qxc5 22. Qxc5 Rxc5 {[%mdl 4096] Endgame KRR-KRR} 23. Rd7 Rb5 24. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Rb6 (24... Ra5 $16) 25. a5 $18 Rb5 26. b4 h6 $2 (26... a6 27. Kc2 b6) 27. Kb2 e4 28. Kb3 Rb8 29. Rhd1 Kh7 $2 (29... Re5 30. Rf7 a6) 30. Rc7 {Accuracy: White = 70%, Black = 31%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "2.3"]
[White "Gajic, Mladen"]
[Black "Zubov, Alexander"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2322"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,54,36,43,38,77,47,44,37,51,48,72,18,33,35,31,-31,-31,-40,-40,-39,-38,-31,-36,-26,-18,-135,-135,-131,-136,-128,-130,-133,-129,-210,-218,-212,-216,-204,-215,-332,-325,-320,-304,-483,-484]} 1. d4 d6 2. e4 g6 3. Nc3 Bg7 4. Be3 a6 5. Qd2 Nd7 6. O-O-O b5 7. h4 {B06: Modern Defence} h6 8. Kb1 Bb7 9. f3 {White is slightly better.} c5 (9... Ngf6 10. Nge2 b4 11. Na4 a5 12. Ng3 h5 13. b3 Bc6 {1-0 (60) Fedorchuk,S (2648)-Almasi,Z (2682) Riadh 2017}) 10. dxc5 dxc5 $146 ({Predecessor:} 10... Nxc5 11. Nh3 Rc8 12. Nf4 {1-0 (32) Berg,E (2558)-Fernandez,D (2447) Vaxjo 2015}) 11. f4 (11. g4 $16) 11... b4 12. Na4 Ngf6 13. Nxc5 (13. e5 $14 Ne4 14. Qxd7+ {[%mdl 64] Decoy} Qxd7 15. Rxd7 Kxd7 16. Nb6+ Kc6 17. Nxa8) 13... Nxc5 $15 14. Qxd8+ Rxd8 15. Rxd8+ Kxd8 16. Bxc5 Nxe4 17. Bb6+ Kd7 {aiming for ...Nd2+.} 18. Nf3 (18. Bd3 $1 $11) 18... Ng3 $36 {[%mdl 2048] White is under strong pressure.} 19. Rg1 Bxf3 $1 20. gxf3 Nxf1 21. Rxf1 {[%mdl 4096] Endgame KRB-KRB} Kc6 22. Ba5 (22. Be3 $17) 22... Rb8 $1 $19 23. Re1 Rb5 $1 {[%cal Rb5a5]} 24. Bd8 {[#]} e6 $1 25. Kc1 (25. Re3 {is a better defense.}) 25... Rd5 26. Be7 {[#]} a5 $1 27. Re4 (27. h5 $142 Rxh5 28. Bd8) 27... Rd7 {Accuracy: White = 28%, Black = 69%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "2.4"]
[White "Bernadskiy, Vitaliy"]
[Black "Malik, Jan"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2581"]
[BlackElo "2304"]
[Annotator "TA"]
[PlyCount "113"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,113,20,24,8,31,0,0,0,0,1,21,47,63,52,97,105,103,97,96,94,107,101,95,89,104,99,97,22,128,79,1048,1048,1935,112,201,207,191,190,188,191,195,144,237,248,197,27,17,57,138,18,17,27,27,45,31,36,184,203,182,186,283,256,534,534,495,461,577,524,792,779,750,849,1509,777,2364,2312,2035,2211,2083,2058,2710,2561,3068,2696,2500,2495]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nf6 6. Qe2 Nc6 7. c3 e6 8. d4 cxd4 9. cxd4 d5 10. e5 Ne4 11. Be3 Be7 12. Ne1 f6 13. f3 Ng5 14. Nd3 O-O 15. Nd2 {B52: Sicilian: Moscow Variation with 3...Bd7} b6 {LiveBook: 10 Games} (15... Rac8 16. Rac1 b6 17. Bf2 Nf7 18. f4 f5 19. Nf3 Rc7 20. h3 Rfc8 21. g4 Nh6 22. g5 Nf7 23. Be3 Nb4 24. Rxc7 {½-½ (24) Stellwagen,D (2622)-Areshchenko,A (2710) Germany 2013}) 16. a3 Rac8 17. Rae1 $146 {White is slightly better.} ({Predecessor:} 17. b4 Rc7 18. Rac1 Rfc8 19. Nb3 Nf7 20. Qb2 Ncd8 21. Rxc7 Rxc7 22. Re1 Qc8 {1-0 (40) Rosso,P (2339)-Mueller Alves,M (2307) LSS email 2010}) 17... fxe5 18. dxe5 Nf7 19. f4 Nh6 20. g4 d4 21. Bf2 Na5 22. h3 $1 Rc2 23. Qd1 Rfc8 24. Re4 {[%cal Be1e4,Be4d4,Bd4d7][%mdl 32]} Qb5 25. Nf3 $1 Nb3 26. Nxd4 Nxd4 27. Rxd4 (27. Bxd4 Qd5 $15) 27... Nf7 28. a4 (28. Re1 $16) 28... Qb3 (28... Qc6 $11) 29. Rd7 $36 {[%mdl 2048] White has strong initiative.} Bc5 $2 {[%mdl 8192]} (29... Bf8 $16) 30. Nxc5 $18 R8xc5 {[#]} 31. f5 $2 (31. Rd8+ $1 $18 {[%mdl 512]} Nxd8 32. Qxd8+ Kf7 33. f5) 31... Rd5 (31... Rc8 $16 {was worth a try.}) 32. Rxd5 exd5 33. Re1 $1 Ng5 34. Re3 Qc4 {[#] ...Rc1 is the strong threat.} 35. Qd3 $1 Rc1+ (35... Ne4 $16 {was called for.}) 36. Kg2 Qc6 {[#]} 37. Qd4 $2 (37. h4 $1 $18 {[%cal Rh4g5]} d4+ 38. Kg3 dxe3 39. Qd8+ (39. hxg5 Qc7 $16) 39... Kf7 40. hxg5) 37... Rc4 $1 $11 {[%cal Rc4d4]} 38. Rc3 Qb7 ({Black should try} 38... h5 $1 $14) 39. Rxc4 (39. Qd3 $16) 39... dxc4+ 40. Kf1 $1 Qh1+ 41. Ke2 {Hoping for Qd8+.} Qf3+ 42. Kd2 h6 (42... Ne4+ $14 43. Kc1 h5) 43. Be3 {Black must now prevent Bxg5.} Ne4+ 44. Kc2 Qe2+ (44... Kh7 {is a better defense.} 45. Kb1 c3) 45. Kb1 $18 Qd3+ $2 (45... Qf1+ {keeps fighting.} 46. Ka2 Qd3 47. Qxd3 cxd3) 46. Qxd3 {White is clearly winning.} cxd3 {[%mdl 4096] Endgame KB-KN} 47. Kc1 Kf7 48. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} Ke7 49. b5 Kd7 50. h4 {[%cal Bh3h4,Bh4h5][%mdl 32]} Ke8 51. Bd4 Ke7 52. h5 Kf7 53. e6+ Kf8 54. Be5 Nf2 55. Kd2 Nxg4 56. Bb8 Ke7 57. Kxd3 {Precision: White = 59%, Black = 22%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "2.5"]
[White "Kueppers, Timo"]
[Black "Vorobiov, Evgeny E."]
[Result "1-0"]
[ECO "A17"]
[WhiteElo "2303"]
[BlackElo "2566"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,73,11,4,-21,-21,-48,-27,-51,-28,-50,-55,-39,-55,-68,-37,-42,-36,-37,-47,-41,-34,-35,-39,-33,-25,-52,-14,-40,-41,-45,-57,-68,-35,-40,-11,-11,0,-19,-9,-8,-11,-10,-9,-53,0,-46,-26,-124,-8,-8,-9,-8,56,49,52,0,599,589,580,553,850,820]} 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. cxd5 exd5 5. d4 Bb4 6. Qa4+ Nc6 7. Bg5 h6 8. Bh4 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4)} (8. Bxf6 Qxf6 9. e3 O-O 10. Rc1 Be6 11. a3 Bd6 12. Nb5 a6 13. Nxd6 cxd6 14. Be2 Rfc8 15. O-O b5 16. Qb3 Qd8 17. Qa2 Na5 18. b3 Rxc1 19. Rxc1 {½-½ (51) Akobian,V (2647)-Bu,X (2730) Riadh 2017}) 8... g5 9. Bg3 Ne4 10. Rc1 {Black has an edge.} h5 {[#] Threatens to win with ...h4.} 11. Ne5 $1 Bd7 12. Nxd7 Qxd7 ({Don't play} 12... Nxg3 $6 13. hxg3 Qxd7 14. e3 $16) 13. f3 $1 {[%cal Rf3e4]} Bxc3+ 14. bxc3 Nxg3 15. hxg3 Qd6 16. Kf2 $146 ({Predecessor:} 16. Rh3 O-O-O {0-1 (32) Johansson,V (2160)-Solin,N (2200) Helsingborg 1991}) 16... h4 17. gxh4 Rxh4 18. Rxh4 gxh4 19. e3 Qg3+ 20. Ke2 O-O-O 21. Rb1 Rd6 22. Qb5 Nd8 23. Qd3 Rf6 24. Qh7 c6 25. Qh5 Re6 26. Qf5 Kc7 27. Rc1 Re7 28. Rc2 b5 ({Better is} 28... Ne6 $15 29. Kd1 Ng5) 29. a4 {Black should prevent axb5.} (29. Qf6 $5 {[%cal Rf6e7]} Re8 30. Qf5 $11) 29... bxa4 30. c4 (30. Qf6 $11 Re8 31. Qf5) 30... h3 (30... Ne6 $17 {aiming for ...Nxd4+.} 31. Qe5+ Qxe5 32. dxe5 Kb6 33. cxd5 cxd5) 31. gxh3 $11 Qh2+ 32. Kd3 $132 {[%mdl 2048] White is not holding back} Qg1 ({Black should play} 32... dxc4+ $11 33. Rxc4 Qf2 34. Qf4+ Kd7) 33. Qf4+ $14 Kb7 34. Be2 (34. Rb2+ $1 $14 Kc8 35. Rb8+ Kd7 36. Qg4+ Qxg4 37. fxg4 dxc4+ 38. Kxc4) 34... Ne6 $2 {[%mdl 8192]} (34... Qb1 $11 35. cxd5 a3) 35. Rb2+ $18 {White is clearly winning.} Ka6 36. Qd6 $1 {[%csl LRc6,LRd5,LRe7][%mdl 64] [#] Double Attack} Nc5+ 37. Kc2 {Accuracy: White = 46%, Black = 38%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "2.6"]
[White "Stefansson, Hannes"]
[Black "Yandarbiev, Ruslan"]
[Result "1-0"]
[ECO "E68"]
[WhiteElo "2523"]
[BlackElo "2302"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,119,68,87,85,73,-125,-118,-114,-113,-115,0,0,7,4,0,7,9,7,28,27,25,12,62,75,74,93,91,20,33,34,27,0,0,0,144,0,0,0,0,0,0,0,0,0,0,0,0,0,596,555,1029,996,710,942,929,894,844,653,644,589,910,774,970,934,866,776,641,599,995,364,12799,12802,29976,29977,29974,2328,29979,29980,29974,29980,29981,29982,29982,29983,29984,29981,29984,29985,29986,29987,29988,29989,29989,29990]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d6 5. Nf3 O-O 6. O-O Nbd7 7. Nc3 e5 8. e4 c6 9. b3 exd4 10. Nxd4 Re8 11. h3 Nc5 12. Re1 a5 13. Bf4 Nh5 14. Be3 Nf6 {[%cal Rc5e4]} 15. Qc2 {E69: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4 c6 9 h3} Bd7 (15... Qe7 16. f4 h5 17. Bf2 Ne6 18. Nf3 Qc7 19. Rad1 b6 20. e5 dxe5 21. Nxe5 Bb7 22. h4 Rad8 23. Rxd8 Rxd8 24. Nxg6 {½-½ (58) Navara,D (2663)-Movsesian,S (2645) Prague 2005}) 16. f4 $146 (16. Rad1 $16 {stays on course.}) ({Predecessor:} 16. Rad1 Qc8 17. Kh2 Re5 18. f3 d5 19. exd5 cxd5 20. Nxd5 Nxd5 21. cxd5 Rh5 22. g4 Rxd5 {1-0 (37) Miezis,N (2434)-Troyke,C (2348) Katowice 2017}) 16... Nfxe4 17. Nxe4 {Black is better.} Nxe4 18. Bxe4 f5 (18... d5 $1 $17 19. cxd5 cxd5 20. Bxg6 (20. Bxd5 Rxe3 {[%mdl 64] Remove Defender} 21. Rxe3 Bxd4 $17) 20... hxg6) 19. Bxc6 $1 $11 Bxc6 20. Nxc6 bxc6 21. Rad1 Qd7 22. Qd3 Re6 23. Bf2 {Threatening Rxe6.} Rae8 24. Kf1 Qb7 25. Rxe6 Rxe6 26. Re1 $1 {[%cal Re1e6]} Kf7 {[#]} 27. Qf3 (27. g4 $1 $16) 27... d5 28. Rxe6 Kxe6 29. Qe3+ Kf7 30. Qc5 a4 (30... Bf8 $11 {keeps the balance.} 31. Qd4 Bg7) 31. bxa4 (31. cxd5 $16 cxd5 32. bxa4) 31... Qb1+ 32. Kg2 Qe4+ {[%mdl 64] Double Attack} 33. Kg1 {cxd5 is the strong threat.} dxc4 34. a5 {[%cal Ba4a5,Ba5a6,Ba6a7][%mdl 32] Strongly threatening a6.} c3 {aiming for ...c2.} 35. a6 $36 {[%mdl 2048] White has good play.} c2 {Hoping for ...Bd4!} 36. a7 $1 {[%cal Ra7a8]} Bd4 $1 {( -> ...Qe1+)} 37. Qc4+ Qd5 $2 {[%mdl 8192]} (37... Ke7 $11 {and Black has nothing to worry.} 38. Bxd4 c1=Q+ 39. Qxc1 Qxd4+ {[%mdl 64] Double Attack} 40. Kf1 Qxa7) 38. Qxc2 $18 Bxf2+ 39. Qxf2 {[%mdl 4096] Endgame KQ-KQ} ({And not} 39. Kxf2 Qd4+ 40. Kf3 Qxa7 $11) 39... Qa5 40. Qd4 Qe1+ 41. Kg2 Qe2+ {[#]} 42. Qf2 $1 {[%cal Rf2e2]} Qa6 43. g4 h6 44. gxf5 gxf5 {[#]} 45. a3 $1 {[%mdl 512]} Qxa3 46. Qb6 {Black must now prevent Qb7+.} Qa4 47. Kg3 {Threatens to win with Qb7+.} Qa3+ 48. Kf2 $2 (48. Kh4 {Threatening mate with Qb7+.} Qe7+ 49. Kh5 Qe2+ 50. Kxh6 Qe6+ 51. Kh5 Qg6+ 52. Kh4 Qf6+ 53. Kg3 Qc3+ 54. Kg2 Qc2+ 55. Kf3 Qe4+ 56. Kg3 Qe1+ 57. Qf2) 48... Qa2+ $2 (48... Qa4 49. Qc7+ (49. Qb7+ Kg6 $18) 49... Kg6 50. Qd6+ Kh5) 49. Ke3 Qe6+ 50. Kd2 Qa2+ 51. Kd3 (51. Kc3 $142 Qa1+ 52. Kc2 Qa2+ 53. Kc3 Qa1+ 54. Kb4 Qe1+ 55. Kc5 Qc1+ 56. Kd6 Qxf4+ 57. Kd7 Qd2+ 58. Kc8) 51... Qd5+ 52. Kc3 {White mates.} Qf3+ 53. Kb2 Qe2+ 54. Ka3 Qe7+ 55. Ka4 Qe4+ 56. Ka5 c5 57. Ka6 Qa4+ 58. Kb7 Qe4+ 59. Qc6 Qb4+ 60. Kc8 {Accuracy: White = 63%, Black = 48%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "3.1"]
[White "Van den Doel, Erik"]
[Black "Rakotomaharo, Fy Antenaina"]
[Result "1/2-1/2"]
[ECO "B92"]
[WhiteElo "2610"]
[BlackElo "2409"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,89,0,6,0,0,0,6,0,1,0,0,0,0,0,0,0,0,0,12,4,12,14,16,6,16,16,39,0,43,55,80,69,72,82,72,66,70,70,84,70,75,68,60,70,46,61,56,53,81,77,84,30,27,23,24,23,26,29,24,16,16,16,23,6,12,8,12,0,0,0,1,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nf3 Be7 8. Bg5 Be6 9. Bxf6 Bxf6 10. O-O O-O 11. Nd5 {B92: Sicilian Najdorf: 6 Be2} Nd7 12. Bc4 Rc8 13. Qe2 Nb6 14. Nxb6 Qxb6 15. Bb3 {[#]} Rc5 $146 ({Predecessor:} 15... a5 16. Rfd1 a4 17. Bxe6 fxe6 18. Rab1 Be7 {1-0 (41) Fedorchuk,S (2607)-Saric,I (2687) Bastia 2018}) 16. Rfd1 Be7 17. Ne1 a5 18. Qe3 Qc7 19. c3 Rb5 20. Bxe6 fxe6 21. Nd3 d5 22. Re1 Bd6 23. Re2 Rf6 24. Rc1 a4 25. exd5 exd5 26. c4 dxc4 27. Qe4 Qc6 28. Qxc6 ({Much worse is} 28. Qxc4+ $6 Qxc4 29. Rxc4 Rd5 $11) 28... bxc6 29. Rxc4 {[%mdl 64] [#] Double Attack} a3 30. bxa3 ({Wrong is} 30. Rxc6 $2 {[#]} e4 $1 $19 {[%mdl 512]}) 30... Rb1+ 31. Re1 Rxe1+ 32. Nxe1 Bxa3 $14 {[%mdl 4096] Endgame KRB-KRN} 33. Kf1 Be7 34. Nd3 Re6 35. Re4 ({White should play} 35. Ke2 $16) 35... Bd6 $11 36. a4 Re7 37. Ke2 Ra7 38. Rc4 Ra6 39. Ke3 Kf7 40. Ke4 Ke6 41. g3 g6 {The position is equal.} 42. h3 h5 43. g4 hxg4 44. hxg4 Ra8 45. Ne1 {Accuracy: White = 65%, Black = 60%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "3.2"]
[White "Plischki, Sebastian"]
[Black "Sedlak, Nikola"]
[Result "1/2-1/2"]
[ECO "A04"]
[WhiteElo "2397"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "121"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,121,36,34,61,52,58,50,60,52,94,85,100,107,111,100,101,99,116,2,3,14,7,7,14,0,0,-6,-4,-21,-13,-57,-31,-28,0,-5,-3,-23,-20,-22,-17,-19,0,-8,-27,-26,-26,-22,-22,-22,-22,-22,0,0,0,0,0,0,0,-9,0,0,0,0,0,-45,0,-37,-14,-111,-81,-156,-147,-131,-66,-43,-7,-132,-35,-54,-46,-53,0,-35,284,-155,-147,-354,-277,-265,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 e6 2. g3 b6 3. Bg2 Bb7 4. O-O Nf6 5. c4 g6 6. Nc3 {A15: English Opening: 1...Nf6} Bg7 7. Re1 {LiveBook: 19 Games} (7. d4 Ne4 8. Bd2 O-O 9. Rc1 c5 10. d5 exd5 11. cxd5 Nxd2 12. Nxd2 d6 13. Nc4 Ba6 14. b3 b5 15. Nd2 {0-1 (29) So,W (2815)-Carlsen,M (2832) chess.com INT 2017}) 7... c5 8. e4 {White is slightly better.} d6 9. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} O-O 10. d5 e5 11. Rb1 $146 ({Predecessor:} 11. Nh4 Bc8 12. f4 exf4 13. Bxf4 {1-0 (35) Koenig,F (1907)-Lenz,T (1696) Berlin 2006}) 11... Kh8 12. a3 Ng8 13. b4 Nd7 14. Be3 Bh6 15. bxc5 (15. Nb5 $16) 15... Bxe3 $11 16. c6 Bc5 17. Na4 Ngf6 18. cxb7 Rb8 {[%cal Ba8b8,Bb8b7,Bb7c7,Bc7c5][%mdl 32]} 19. Qb3 Rxb7 20. Bh3 Rc7 21. Bxd7 Qxd7 22. Kg2 Ng4 23. Nxc5 Rxc5 24. h3 Nf6 {[%cal Bg4f6,Bf6d7,Bd7c5][%mdl 32]} 25. Qd3 Rfc8 26. Nd2 h5 27. Rf1 h4 28. g4 Qe7 29. a4 Nd7 30. Rb5 Kg8 31. Ra1 R5c7 32. a5 bxa5 33. Rbxa5 Nc5 34. Qe3 a6 35. R5a3 Qf6 36. Rb1 Ra8 37. Rb6 Qd8 38. Nf3 Rcc8 39. Rb1 (39. Qh6 $5 {[%cal Rf3g5]} Nxe4 40. c5 $17) 39... Kg7 40. g5 (40. Nd2 $11) 40... Rcb8 41. Rxb8 (41. Rd1 $142) 41... Rxb8 $17 42. Nxh4 a5 ({Better is} 42... Rb4 $17 43. Nf3 Rxc4) 43. Nf3 $15 Qc7 {[%mdl 1024] Black has compensation.} 44. h4 {[#]} (44. Nd2 $11 {keeps the balance.}) 44... a4 (44... Qc8 $1 $17 {[%cal Rc8g4] Hoping for ...Qg4+.} 45. Nh2 a4) 45. Nd2 $1 Rb2 46. Qc3 Qb6 (46... Qb7 $15) 47. Kf1 (47. h5 $5 gxh5 48. Qf3 $11) 47... Rb3 $2 {[%mdl 8192]} (47... Kg8 $15 {stays ahead.}) 48. Rxb3 $2 ({White has to play} 48. Nxb3 $18 axb3 49. Qf3 Nxe4 50. Qxe4) 48... axb3 $17 {[%cal Ba4b3,Bb3b2][%mdl 32]} 49. f3 $2 (49. Ke2 $17) 49... b2 50. Nb1 {[#]} Na4 $2 (50... Qa6 $1 $19 {Threatens to win with ...Qa2.} 51. Kf2 Qa1) 51. Qa3 $11 {The position is equal.} Qd4 52. Qxd6 Qxc4+ 53. Kg2 Qc2+ 54. Kg3 Qxb1 55. Qf6+ Kg8 56. Qd8+ Kh7 57. Qe7 $1 {[%cal Re7f7]} Qg1+ 58. Kh3 Qf1+ 59. Kg3 Qe1+ 60. Kh3 Kg8 {( -> ...Qh1+)} 61. Qd8+ $1 {Precision: White = 50%, Black = 51%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "3.3"]
[White "Zubov, Alexander"]
[Black "Szotkowski, Jakub"]
[Result "1/2-1/2"]
[ECO "A58"]
[WhiteElo "2605"]
[BlackElo "2383"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,94,40,41,62,33,63,41,66,43,31,29,33,19,30,30,34,0,0,4,0,0,0,-13,12,12,20,25,18,0,0,0,0,0,0,0,102,91,94,105,96,103,152,136,179,177,185,197,184,154,197,194,201,201,188,187,201,200,189,185,486,471,484,225,420,420,504,504,504,497,424,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. Nf3 d6 8. g3 Bg7 9. Bg2 Nbd7 10. Rb1 O-O {A58: Benko/Volga Gambit: Lines with 5 bxa6} 11. b3 (11. O-O Qa5 12. Bd2 Rfb8 13. a4 Qd8 14. b3 Bb7 15. Nh4 Nb6 16. e4 Ba6 17. Re1 Nbd7 18. f4 Bd3 19. Rc1 c4 20. e5 {0-1 (41) Rodshtein,M (2699)-Kislinsky,A (2513) Katowice 2017}) 11... Qa5 12. Bd2 $1 Rfb8 {White is slightly better.} 13. a4 Ne8 $146 ({Predecessor:} 13... Qd8 14. Qc2 Nb6 15. Nh4 Bb7 16. e4 Ba6 17. f4 Qc8 18. h3 {0-1 (34) Bures,J (2394)-Kislinsky,A (2462) Czech Republic 2016}) 14. Na2 Qb6 15. O-O Nc7 16. Bc3 Nf6 $1 17. Nh4 Bb7 {[%cal Rc7d5]} 18. e4 e6 19. b4 {a5 is the strong threat.} exd5 20. a5 Qb5 21. e5 $36 {[%mdl 2048] White is pushing.} Ne4 22. Bxe4 dxe4 23. bxc5 Qxc5 24. Qxd6 Ne6 25. Qxc5 Nxc5 26. Rb5 Bd5 (26... Rc8 $11 {remains equal.} 27. Nb4 Nb3) 27. Rxc5 $16 Bxa2 28. Ra1 Be6 29. a6 Bf8 30. Rca5 $1 Rc8 31. Bd4 Rc4 32. Be3 Bb4 {[#]} 33. R5a4 $1 {Black must now prevent Rb1.} Bc3 34. Rxc4 Bxa1 35. Ra4 (35. Rxe4 Rxa6 36. f4 Bc3 $11) 35... Bxe5 {[#]} 36. a7 $1 (36. Rxe4 $6 Bb8 $14) 36... f5 37. Ra5 Bc7 38. Rb5 Rd8 $2 (38... Bc8 39. f3 Kf7 40. fxe4 fxe4) 39. Rb7 $18 Be5 40. Bf4 ({Less strong is} 40. Re7 Bc4 $16) (40. Bb6 $142 Bd5 41. Re7 (41. Bxd8 Bxb7 42. Bb6 Kf8 $11)) 40... e3 $2 (40... Bd5 41. Rb5 Bxf4) 41. fxe3 ({But not} 41. Bxe5 $2 Rd1+ 42. Kg2 Bd5+ 43. Kh3 Bxb7 $19) 41... Rd1+ 42. Kf2 Rd2+ 43. Ke1 Bc3 44. Be5 $2 ({Better is} 44. Rb8+ $18 Kf7 45. a8=Q Rd8+ 46. Kf2 Rd2+ 47. Ke1 Rd8+ 48. Kf1 Rd1+ 49. Kg2 Bd5+ 50. Qxd5+ Rxd5 51. Nf3) 44... Rd4+ $1 $11 {The position is equal.} 45. Kf2 Rd2+ {[%mdl 64] Discovered Attack} 46. Ke1 Rd4+ $1 47. Kf2 Rd2+ {[%mdl 64] Discovered Attack. Accuracy: White = 59%, Black = 50%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "3.4"]
[White "Sokolov, Alexander"]
[Black "Bernadskiy, Vitaliy"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "2393"]
[BlackElo "2581"]
[Annotator "TA"]
[PlyCount "154"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,154,91,100,56,46,40,57,30,59,55,71,53,58,55,47,47,69,56,60,46,76,4,60,59,45,45,74,68,66,66,97,50,67,39,46,33,50,17,45,11,33,11,11,0,16,-6,0,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-187,-6,-6,-6,-6,-6,-6,0,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-14,-6,-25,-20,-20,-7,-42,-42,-42,-41,-41,-16,-21,-16,-16,-16,-19,-16,-180,-178,-177,-168,-176,-165,-176,-176,-169,-154,-168,-135,-93,0,-197,0,0,0,0,0,-51,-48,-102,-82,-110,0,0,0,0,0,0,0]} 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 c6 5. Nf3 Bg4 6. Be3 Qb6 7. Qd2 Nf6 8. e5 {B06: Modern Defence} (8. Be2 {seems wilder.} O-O 9. h3 Bd7 10. g4 a5 11. a3) 8... Nd5 $1 9. Nxd5 cxd5 10. Be2 $146 {White is slightly better.} ({Predecessor:} 10. c4 Bxf3 11. gxf3 e6 12. cxd5 exd5 13. f5 Nc6 14. f4 dxe5 15. fxe5 f6 {0-1 (33) Alsina Leal,D (2428)-Moskalenko,V (2543) Badalona 2006}) 10... O-O 11. c3 Nd7 12. O-O e6 13. h3 Bxf3 14. Bxf3 Qc6 15. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Rac8 16. a5 f6 {[%cal Rd6e5]} 17. exd6 (17. c4 $16 Qxc4 18. Bg4) 17... Qxd6 (17... f5 $11) 18. g4 $14 f5 19. g5 Nb8 20. h4 Nc6 21. h5 Rf7 22. Qd3 a6 23. Bd2 (23. h6 $5 {[%cal Rh6g7]} Bf8 24. Bd2 $14) 23... Qc7 24. Rfe1 Re7 $1 25. Qe3 Rce8 26. b4 (26. h6 $5 {[%cal Rh6g7]}) 26... Nd8 {[%cal Bc6d8,Bd8f7,Bf7d6,Bd6e4][%mdl 32]} 27. Bd1 Nf7 $1 28. Rf1 Nd6 29. Be1 Rc8 30. h6 Bf8 31. Rf3 Ne4 32. Ra3 Qb8 33. Kg2 Rec7 34. Be2 Bd6 35. Bf1 Rf8 36. Be2 Qd8 37. Kf1 Qe7 38. Rb3 Rb8 39. Ra3 Qe8 40. Kg2 Rbc8 41. Bf1 Re7 42. Be2 Bb8 43. Qd3 Qd8 44. Kh1 $2 (44. Qe3 $11) 44... Rec7 $2 ({Black should try} 44... Qd6 $1 $19 {White must now prevent ...Nxg5!} 45. Kg2 Qd8) 45. Kg2 Qd6 46. Qe3 Re7 47. Kf1 Rce8 48. Qd3 Qc7 49. Bd1 Nd6 50. Ba4 Rc8 51. Bb3 Qd8 52. Qe2 Ne4 53. Bd1 Bd6 54. Qd3 Qc7 55. Qe3 b6 56. Be2 b5 57. Kg2 Rce8 58. Ra2 Qd8 59. Kf1 Bb8 60. Bd1 Nd6 61. Be2 Nf7 62. Bg3 $2 {[#]} (62. Qd3 $11 {and White is okay.}) 62... Nxg5 $1 $19 {[%mdl 512]} 63. fxg5 Bxg3 $1 64. Rxg3 {And now Bf3 would win.} f4 $1 {[%cal Rf4e3]} 65. Qe5 fxg3 66. Bg4 {Strongly threatening Bxe6+!} Rf7+ 67. Kg2 Qc7 $1 68. Re2 {[#]} Qxc3 (68... Qxe5 $1 $17 69. Rxe5 Rfe7 70. Kxg3 Kf7) 69. Re3 $2 {[#]} (69. Kh3 $1 $11) 69... Qxb4 $2 (69... Qc2+ $1 $19 70. Re2 Qb3) 70. Bxe6 $11 {[#]} Rxe6 $1 71. Qxe6 Qxd4 $19 {[%mdl 4096] Endgame KQR-KQR} 72. Rf3 ({White should play} 72. Re2 $11) 72... Qd2+ $15 {[%mdl 64] Double Attack} 73. Kxg3 Qxg5+ {[%mdl 64] Double Attack} 74. Kf2 Qh4+ (74... Qe7 $17 75. Qxd5 Qh4+ 76. Ke2 Qc4+ 77. Rd3 Qxd5 78. Rxd5 Ra7) 75. Kg2 $11 {The position is equal.} Qe7 76. Qc8+ Qf8 77. Qe6 {Rc3 is the strong threat.} Qe7 {Accuracy: White = 49%, Black = 59%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "3.5"]
[White "Vedrickas, Tautvydas"]
[Black "Stefansson, Hannes"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "2390"]
[BlackElo "2523"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,58,12,0,0,8,9,14,15,16,-17,-14,-18,-14,-15,28,-33,-33,-47,-38,-121,-108,-127,-104,-245,-106,-89,-38,-77,-34,-29,-20,-19,-55,-62,-3,-10,-20,-14,-24,-104,-114,-269,-243,-873,-868,-839,-834,-1934,-1933,-1840,-1730]} 1. d4 d5 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 (4... Nf6 5. a3 Bxc3+ 6. Qxc3 O-O 7. Bg5 h6 8. Bxf6 Qxf6 9. Nf3 c6 10. e3 Nd7 11. Rc1 a5 12. Bd3 Re8 13. O-O dxc4 14. Qxc4 e5 15. Bb1 {1-0 (46) Bu,X (2664)-Zhao,X (2553) Biel 2013}) 5. cxd5 exd5 6. a3 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6} Bxc3+ $146 ({Predecessor:} 6... Qa5 7. axb4 Qxa1 8. Nxd5 Na6 9. e4 Be6 10. Bb5+ Kd8 11. Ne2 Bxd5 12. O-O {1-0 (65) Krysa,L (2457)-Halvax,G (2316) Graz 2015}) 7. Qxc3 cxd4 8. Qxd4 {The position is equal.} Nf6 9. b4 Nc6 10. Qb2 O-O 11. Nf3 Re8 12. e3 ({Better is} 12. Bg5 $1 $11) 12... Bg4 $36 {[%mdl 2048] White is under pressure.} 13. b5 Na5 14. Bd3 (14. Nd4 $15) 14... Bxf3 $1 $17 15. gxf3 d4 {And now ...dxe3 would win.} 16. e4 (16. O-O $17) 16... Nd5 (16... Nd7 $19 {has better winning chances.} 17. Be2 Rc8) 17. Rg1 Qf6 (17... Nc3 $17 {White must now prevent ...Qh4.} 18. Qb4 Rc8) 18. Rg3 g6 19. Bg5 Qe5 20. Kf1 Nf4 21. Rd1 Rac8 ({Black should try} 21... Ne6 $15) 22. Bxf4 $1 $11 Qxf4 23. Qxd4 Red8 24. Qb4 {[#]} (24. Qa4 $11 b6 25. Kg2) 24... Nc4 $1 $17 {[%cal Rc4e5][%mdl 512] Strongly threatening ...Ne5.} 25. Kg2 $2 {[#]} (25. e5 $17 {might work better.}) (25. Bxc4 Rxd1+) 25... Ne5 $1 $19 26. Be2 $2 (26. Qb3 h5 27. h4) 26... Rxd1 {[%mdl 64] Overworked Piece. Black is clearly winning.} 27. Bxd1 {[#]} Nd3 $1 28. Qb3 Qd2 29. e5 Rc1 {Accuracy: White = 20%, Black = 51%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.10"]
[Round "3.6"]
[White "Kramer, Julian"]
[Black "Kriebel, Tadeas"]
[Result "1/2-1/2"]
[ECO "C55"]
[WhiteElo "2380"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "148"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,148,35,26,31,22,43,24,29,26,27,0,0,0,0,0,0,0,14,-45,-33,-42,-46,-48,-12,-27,2,8,9,8,14,19,28,29,77,91,133,127,115,118,116,112,203,197,200,172,232,180,178,174,170,180,181,164,166,165,192,187,227,223,218,197,272,235,230,227,208,205,191,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,19,19,19,19,19,19,19,19,0,19,19,19,19,19,19,20,19,19,19,19,19,20,19,20,19,19,19,28,8,154,147,148,148,144,40,135,40,44,8,8,8,8,8,95,8,8]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. O-O d6 6. c3 g5 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack} 7. Re1 (7. Nbd2 Bg7 8. Bb3 O-O 9. Nc4 d5 10. Ncxe5 dxe4 11. dxe4 Nxe5 12. Nxe5 Qxd1 13. Rxd1 Nxe4 14. Nd3 {½-½ (34) Giri,A (2783)-Matlakov,M (2700) St Petersburg 2018}) 7... Bg7 8. d4 O-O {White has an edge.} 9. dxe5 dxe5 10. Qxd8 (10. Nfd2 {feels hotter.} a6 11. a4 g4 12. Qe2 Nh5 13. g3) 10... Rxd8 11. h3 $146 ({Predecessor:} 11. b4 a6 12. Nbd2 Ne8 13. a4 Nd6 14. Ba2 {1-0 (63) Popov,I (2599)-Triapishko,A (2500) Sochi 2017}) 11... a6 12. Na3 {[%cal Bb1a3,Ba3c2,Bc2e3,Be3c4,Bc4e5][%mdl 32]} b5 13. Bf1 Rb8 14. h4 (14. Nc2 $11) 14... g4 $15 15. Nd2 Bf8 16. g3 Na5 17. Nc2 c5 18. a4 {Threatening axb5.} b4 19. Ne3 Bb7 20. Nec4 Nc6 21. a5 Na7 22. Nxe5 {And now Bc4 would win.} Re8 23. Nec4 Nb5 24. e5 bxc3 25. bxc3 Nxc3 (25... Nd5 $16) 26. Bb2 $18 Nfd5 27. Nd6 Red8 (27... Re6 {was worth a try.} 28. Bc4 Bxd6 29. exd6 Rd8 30. Rxe6 fxe6) 28. Nxb7 Rxb7 29. Bxc3 Nxc3 30. Ne4 $1 {[%cal Re4c3]} Nxe4 31. Rxe4 Rb4 32. Bc4 $1 h5 33. Rf4 Bh6 34. Bxf7+ {[%mdl 64] Double Attack} Kg7 35. Rf5 $1 {Hoping for e6.} Re4 (35... c4 $142) 36. e6 ({Much less strong is} 36. Rxh5 $6 Bd2 $18) (36. Bxh5 $6 Rf8 $18) 36... c4 37. e7 (37. Rxh5 Rd2 $14) 37... Rxe7 38. Bxc4 ({Worse is} 38. Bxh5 Rc7 $11) 38... Kg6 39. Rd5 $2 (39. Rc5 $18) 39... Rxd5 $11 40. Bxd5 {[%mdl 4096] Endgame KRB-KRB} Bd2 41. Ra2 Bc3 42. Bc4 Re5 43. Bd3+ Kf6 44. Rc2 Bxa5 45. Rc6+ Kg7 46. Rg6+ Kf7 47. Rxa6 Bc3 48. Kg2 Bd4 49. Ra4 Bc3 50. Be4 Kf6 51. Rc4 Ba5 52. f3 gxf3+ 53. Kxf3 Rb5 54. Rc6+ Kg7 55. Kg2 Re5 56. Kf3 Bd2 57. Rc7+ Kf6 58. Rc2 Bb4 59. Rc6+ Kg7 60. Kf4 Rc5 61. Re6 Bd2+ 62. Kf3 Kf7 63. Rd6 Bb4 64. Bg6+ Kg7 {White must now prevent ...Rc3+.} 65. Re6 Rc3+ 66. Kf4 Ba3 (66... Ba5 $11) 67. Bxh5 $16 Bc1+ 68. Kg4 Be3 69. Re7+ (69. Kf3 $16 Ba7+ 70. Kg2) 69... Kg8 {[#]} (69... Kh6 $1 $14) 70. Rf7 (70. Re8+ $1 $16 Kg7 71. Re7+ Kf6 72. Rf7+ Ke6 73. Rg7) 70... Bb6 $14 71. Rf3 Rxf3 72. Kxf3 Bd8 73. Kg4 Kg7 {[#]} (73... Bc7 $1 $11 {remains equal.}) 74. Kf5 (74. Kh3 $1 $16) 74... Bxh4 {Accuracy: White = 57%, Black = 51%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.11"]
[Round "4.1"]
[White "Stefansson, Hannes"]
[Black "Bakhmatsky, Vladislav"]
[Result "1-0"]
[ECO "E63"]
[WhiteElo "2523"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,93,23,36,34,31,31,35,32,43,33,30,36,33,35,44,43,46,13,20,20,19,14,27,0,0,0,0,0,25,24,16,0,87,81,133,141,137,118,191,191,190,195,194,194,270,268,251,194,218,218,250,250,249,249,277,270,331,326,347,308,443,437,520,533,540,522,531,529,529,529,529,502,718,714,708,702,729,722]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O a6 8. Re1 Rb8 9. Rb1 Bf5 10. e4 {E63: King's Indian: Fianchetto: Panno Variation with 7...a6} Bg4 11. Be3 Nd7 12. Qd2 {White is slightly better.} e5 {Strongly threatening ...Bxf3.} 13. d5 Bxf3 14. Bxf3 ({Don't play} 14. dxc6 Bxg2 15. Kxg2 bxc6 $15) 14... Nd4 15. Bg2 c5 16. dxc6 bxc6 17. b4 {[#]} Qc7 $146 ({Predecessor:} 17... Nb6) 18. Rec1 Rb7 19. a3 Rfb8 20. Qa2 Qd8 21. Bf1 Qe7 22. Rb2 Nc5 23. Rcb1 Nce6 24. b5 Nc5 {[#]} (24... Qc7 $11 {keeps the balance.}) 25. a4 $1 $16 {[%cal Ba3a4,Ba4a5][%mdl 32]} Qe6 (25... Ra8 $142) 26. bxa6 Rxb2 27. Rxb2 Nxa6 (27... Rf8 $16) 28. Rxb8+ $18 Nxb8 29. a5 Na6 {[#]} 30. c5 $1 {[%mdl 512]} Qxa2 (30... Nxc5 {was called for.} 31. a6 Qxa2 32. Nxa2 Nxa6) 31. Nxa2 Nxc5 32. a6 {Threatens to win with a7.} Nxa6 33. Bxa6 Ne6 34. Nb4 c5 35. Nd5 Bf8 36. Kf1 Kg7 37. Ke2 f6 38. Kd3 Nd8 (38... Kf7 $142 39. Bc4 Kg7) 39. Nc7 {White is clearly winning.} Kf7 40. Bc4+ Ke7 41. Bg8 Bg7 42. Nd5+ Kf8 43. Bxh7 Kf7 44. f4 f5 45. exf5 gxf5 46. Bxf5 Nc6 47. h4 {Accuracy: White = 89%, Black = 49%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.11"]
[Round "4.2"]
[White "Gasanov, Eldar"]
[Black "Kozusek, Daniel"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2500"]
[BlackElo "2350"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,67,-12,21,22,37,23,62,49,75,67,75,62,65,62,86,91,82,72,82,75,86,80,113,94,87,65,66,59,72,65,83,80,142,135,141,119,118,118,118,116,110,102,134,141,198,197,194,190,193,191,344,341,29984,29985,29985,29986,29994,29995,29995,29996]} 1. e4 e6 2. d3 d5 3. Qe2 Nf6 4. Nf3 c5 5. g3 b5 (5... Be7 6. Bg2 O-O 7. O-O Nc6 8. e5 Nd7 9. c4 b5 10. Na3 bxc4 11. dxc4 Ba6 12. Rd1 Qa5 13. Bd2 Nb4 14. Qe1 Rfe8 15. cxd5 exd5 16. Bxb4 cxb4 17. Nc2 Rac8 18. e6 Nb6 19. exf7+ Kxf7 20. Bh3 Bd6 21. Be6+ Kf6 22. Ncd4 Rc7 23. Qe3 h6 24. Nh4 {1-0 (24) Amin,B (2700)-Mareco,S (2645) Sharjah 2018}) 6. exd5 {C00: French: Unusual White 2nd moves} Nxd5 7. c4 bxc4 8. dxc4 {White is slightly better.} Nf6 9. Bg2 Bb7 10. O-O Nbd7 $146 ({Predecessor:} 10... Nc6 11. Rd1 Qc8 12. Nc3 Be7 {½-½ (32) Martinez Ramirez,E (2301)-Gonzalez Rodriguez,J (2436) Barcelona 2011}) 11. Nc3 a6 12. Rd1 Be7 13. Bg5 Qb6 14. Rd3 Bc6 15. Rad1 Ra7 16. Nh4 Bxg2 17. Kxg2 h6 18. Bc1 O-O 19. b3 Qc6+ 20. Kg1 Raa8 {[#]} ({Black should play} 20... Qc8) 21. Nf5 $1 $16 {[%mdl 512]} Rfe8 (21... exf5 22. Qxe7) 22. Nxe7+ Rxe7 23. Rd6 Qb7 24. Bf4 Rc8 25. R1d2 Kh8 26. g4 Ree8 (26... Nf8 $16) 27. h4 $18 {aiming for g5.} Nf8 28. g5 hxg5 29. hxg5 N6d7 $2 (29... N6h7 30. Ne4 Kg8) 30. Ne4 {Rxd7! is the strong threat.} f5 $2 {[#]} (30... Kg8 $18 31. R6d3 Qc6) 31. Rxd7 $1 {[%mdl 576] Clearance. White mates.} Nxd7 (31... Qxd7 32. Qh5+) 32. Nd6 {[%mdl 64] Double Attack} Qc6 33. Qh5+ {[%mdl 64] Double Attack} Kg8 34. Qf7+ {Accuracy: White = 81%, Black = 35%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.11"]
[Round "4.3"]
[White "Dong, Bao Nghia"]
[Black "Cernousek, Lukas"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2180"]
[BlackElo "2429"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,107,0,-3,-6,0,0,0,0,0,0,0,-6,-11,-24,-25,-24,-24,-14,-26,-40,-47,-77,-41,-69,0,0,0,0,0,0,2,2,0,0,76,75,72,64,60,77,67,60,79,80,93,93,93,91,93,93,93,93,95,93,93,89,93,93,86,85,86,86,86,79,86,72,105,105,105,98,114,112,119,112,112,112,111,111,100,86,86,72,72,72,70,68,100,76,253,244,509,357,370,12,12,12,12,12]} 1. d4 Nf6 2. Nf3 g6 3. h3 Bg7 4. Bf4 O-O 5. e3 d6 6. Bc4 b6 7. a4 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} (7. O-O Bb7 8. Nbd2 c5 9. c3 Nc6 10. Qe2 a6 11. a4 Qc7 12. Rfd1 Na5 13. Ba2 cxd4 14. exd4 Nd5 {1-0 (46) Pourramezanali,A (2522)-Evdokimov,A (2495) Mersin 2016}) 7... a6 8. O-O Bb7 9. Nbd2 Nbd7 {[%cal Bb8d7,Bd7b6,Bb6c4][%mdl 32]} 10. Bh2 Qe8 11. b4 $146 ({Predecessor:} 11. Re1 e5 12. dxe5 Nxe5 13. Nxe5 dxe5 14. c3 {½-½ (49) Saligo,P (1912)-Stuemer,P (2135) Gent 2011}) 11... e5 12. Ra3 e4 13. Ne1 $1 {[#]} b5 $1 {[%mdl 512]} 14. axb5 Nb6 15. bxa6 Nxc4 16. axb7 Rxa3 17. Nxc4 Rc3 {[#]} (17... Ra2 $15 18. Nxd6 Qa4) 18. Nxd6 $1 $11 {[%mdl 512]} cxd6 19. Bxd6 Qb5 20. Qa1 $1 {[%cal Ra1c3]} Rc6 $1 $132 {[%cal Rc6d6][%mdl 2048] Black is fighting back} 21. Bxf8 Bxf8 22. d5 Nxd5 (22... Rd6 $11) 23. Qa8 $16 Rb6 {[#]} 24. c4 $1 {[%cal Rc4b5][%mdl 576] Double Attack} Qxb4 {Strongly threatening ...Nc3.} (24... Qxc4 25. b8=Q) 25. cxd5 {Threatens to win with Nc2.} Rxb7 26. Nc2 Qb3 27. d6 $1 {Hoping for Nd4.} Rd7 28. Qxe4 Rxd6 29. Nd4 Qd5 30. Qxd5 Rxd5 {[%mdl 4096] Endgame KRB-KRN} 31. Ra1 Rd7 32. Ra8 h5 33. g4 hxg4 34. hxg4 Kg7 35. Rc8 Bd6 36. Kg2 Be5 37. Nf3 Bf6 38. g5 Bb2 39. Rc2 Ba1 40. Nh2 Re7 41. Ng4 f6 42. gxf6+ Bxf6 43. Rc6 Bb2 44. f4 Rb7 45. e4 Rb4 46. Rc7+ Kf8 47. Kf3 Rb3+ 48. Ke2 Bd4 49. e5 Rg3 $2 {[#]} (49... Rb5 $16 50. Nf6 Ra5 51. Nh7+ Kg8) 50. Nf6 $1 $18 g5 $2 (50... Ra3 51. Rc6 Kg7) 51. Rc4 Ba1 {[#] intending ...gxf4.} 52. Rc8+ $2 (52. Nh7+ $1 $18 Ke7 53. Nxg5) 52... Kf7 $11 53. Ne4 $1 {[%csl LRg3,LRg5]} gxf4 {aiming for ...Re3+.} 54. Nxg3 {Accuracy: White = 58%, Black = 55%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.11"]
[Round "4.4"]
[White "Nguyen, Piotr"]
[Black "Martin Duque, Jesus"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2419"]
[BlackElo "2347"]
[Annotator "TA"]
[PlyCount "202"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,202,1,15,17,26,19,24,20,19,-7,0,-5,0,-14,0,-13,-6,-24,-8,-41,-6,-22,-23,-18,-16,-45,-33,-39,-27,-13,-14,-60,-49,-54,-54,-54,-39,-51,-21,-30,-29,-47,-41,-57,-23,-25,-26,-33,-25,-25,0,-25,-25,-25,-20,-25,-19,-25,13,-16,13,0,27,0,0,0,0,0,5,0,0,-120,-72,-265,-145,-142,-96,-133,-107,-121,-110,-189,-187,-179,-186,-184,-182,-227,-225,-183,-175,-274,-23,-16,-24,-68,-14,-12,-10,-8,0,0,9,10,8,-47,-34,-83,-63,-79,-67,-33,0,0,0,0,4,0,4,0,0,2,31,35,20,12,12,12,52,52,52,50,49,33,33,13,33,13,20,20,20,23,31,12,13,12,20,8,9,11,10,8,8,8,20,20,20,9,13,13,20,20,20,20,20,20,20,20,20,20,20,0,8,0,20,6,8,8,8,7,8,8,8,8,8,0,0,0,8,8,8,8,8]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 c5 4. e3 Nc6 5. Nbd2 e6 6. c3 cxd4 7. exd4 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} Nh5 8. Be3 Bd6 9. Ne5 {White has an edge.} (9. Bd3 Nf4 10. Bxf4 Bxf4 11. g3 Bd6 12. O-O O-O 13. Re1 Bd7 14. h4 h6 {1-0 (44) Caruana,F (2822)-Aronian,L (2767) chess.com INT 2018}) 9... g6 10. Be2 (10. Ndf3 {seems wilder.} f6 11. Ng4 Ng7 12. Bd2 Nf5 13. Be2) 10... Ng7 $1 11. f4 f6 12. Nd3 O-O 13. O-O b6 14. Qa4 $146 ({Predecessor:} 14. a4 a5 {1-0 (35) Milanovic,D (2494)-Lobanov,S (2526) Skopje 2018}) 14... Qd7 15. Bg4 Qb7 16. Rae1 Bd7 17. Qc2 Rac8 18. Nb3 a5 19. a3 Ne7 {[%cal Bc6e7,Be7f5,Bf5d6,Bd6c4][%mdl 32]} 20. g3 Nef5 21. Nbc1 Bb8 22. Nf2 Bb5 23. Ncd3 Qa6 24. Qd1 Nd6 25. Be2 Qb7 26. Bc1 Qd7 27. Bf3 Bc4 28. a4 Ba6 29. Qb3 Nc4 30. Re2 Bb7 31. Rfe1 Bc6 32. Qd1 Nd6 33. b3 Bb7 34. Bb2 Ba7 35. Bg2 Kh8 36. Qa1 Rfe8 37. Ba3 Bb8 38. Ng4 Nh5 39. Ndf2 Ba6 40. Rc2 Nf5 41. Rec1 (41. Qc1 $11) 41... Qd8 42. Nd1 $2 {[#]} (42. b4 $17) 42... Nhxg3 $1 {[%mdl 512]} 43. hxg3 $17 h5 44. Nge3 Nxg3 45. c4 Bxf4 46. Qb2 (46. Qc3 $17 {was called for.}) 46... f5 $19 47. Rf2 Qg5 48. Rxf4 Qxf4 49. Qf2 Qxf2+ 50. Kxf2 f4 51. Kf3 (51. Nc3 {keeps fighting.}) 51... fxe3 $2 (51... Kg7 $19 52. Kxf4 Ne2+ {[%mdl 64] Double Attack} 53. Kg5 Nxc1 54. Bxc1 dxc4) 52. Kxg3 $11 e2 53. Nc3 $1 dxc4 ({Black should try} 53... Kh7 $15 54. Bf3 Red8) 54. b4 axb4 55. Bxb4 Kh7 56. Ne4 Rf8 57. Bxf8 Rxf8 58. Bf3 (58. Nc3 $1 $11) 58... Bb7 $15 59. Ng5+ {[%mdl 64] Discovered Attack} Kh6 60. Re1 $1 Kxg5 61. Bxb7 $17 {[%mdl 4096] Endgame KRB-KR} Rf4 62. Rxe2 Rxd4 63. Rxe6 Rd3+ 64. Kf2 Ra3 65. Bc6 c3 66. Be8 c2 67. Rxg6+ Kf4 68. Rf6+ {[%mdl 64] Discovered Attack} Kg5 69. Rc6 Rxa4 (69... Ra2 {keeps more tension.} 70. Ke3 h4 71. Bf7 Ra3+ 72. Kf2 Rxa4 73. Bb3 Rf4+) 70. Rxc2 Rb4 71. Rd2 h4 72. Kg2 Kf4 73. Kh3 Ke3 74. Rd8 (74. Rd5 {seems wilder.} Kf3 75. Bb5 Ke4 76. Bc6 Ke3 77. Bd7) 74... Rd4 75. Rb8 (75. Ra8 {is interesting.} Rb4 76. Rb8 Kd3 77. Rd8+ Kc4 78. Kxh4 b5 79. Kg3) 75... Rb4 76. Bd7 Kd2 77. Bg4 Rb3+ {The position is equal.} 78. Kxh4 b5 79. Kg5 b4 80. Kf4 Kc3 81. Bf5 Ra3 82. Ke3 Ra7 83. Rc8+ Kb2 84. Kd3 {Rb8 is the strong threat.} Ra3+ 85. Kd4 {Strongly threatening Rc2+.} Rg3 86. Rb8 b3 87. Kc4 {And now Kb4 would win.} Rc3+ 88. Kb4 Rf3 $1 {[%cal Rf3f5]} 89. Be6 {Threatens to win with Rh8.} Rf4+ $1 90. Kc5 Rf3 91. Kb4 {Hoping for Rh8.} Rf4+ $1 92. Kc5 Rf3 93. Kd4 {aiming for Bd5.} Kc2 94. Rc8+ Kd2 95. Rh8 Rf4+ 96. Ke5 b2 97. Rb8 Kc1 $1 98. Rc8+ Kd2 {White must now prevent ...Rf1.} 99. Rb8 Kc1 $1 100. Kxf4 {White threatens Bf5 and mate.} b1=Q 101. Rxb1+ Kxb1 {Accuracy: White = 48%, Black = 54%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.11"]
[Round "4.5"]
[White "Lavrov, Maxim"]
[Black "Van den Doel, Erik"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2387"]
[BlackElo "2610"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,56,15,26,-12,-10,-27,0,-13,-2,-20,11,-3,9,-37,-29,-45,-35,-30,-21,-39,0,25,7,0,0,0,0,3,0,3,21,20,27,-48,-44,-68,-51,-45,382,-18,112,0,89,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. c3 O-O 6. Bb3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} (6. O-O d6 7. Re1 h6 8. Nbd2 a6 9. a4 a5 10. Nf1 Be6 11. b3 d5 12. exd5 Nxd5 13. Bd2 Bd6 14. Ng3 Re8 15. Qc2 {½-½ (145) Anand,V (2773)-So,W (2765) Kolkata 2018}) 6... d5 7. Qe2 d4 8. O-O Rb8 $146 ({Predecessor:} 8... Bg4 9. h3 Bh5 10. Nbd2 Qe7 11. c4 h6 12. Rd1 Nh7 13. Nf1 Bg6 {1-0 (47) Sieber,F (1942)-Zahn,A (2024) Erfurt 2014}) 9. Bg5 Be7 10. h3 h6 11. Bh4 Nh5 $1 {[%cal Rh5f4]} 12. Bg3 Nxg3 13. fxg3 Bf6 14. Nbd2 Na5 (14... dxc3 $15 15. bxc3 b5) 15. cxd4 $11 exd4 16. Rac1 Nxb3 17. Nxb3 b6 18. e5 Bg5 $1 {[%cal Rg5c1]} 19. Nxg5 hxg5 20. Nd2 $36 {[%mdl 2048] Black is under pressure.} Qe7 21. Ne4 (21. Rce1 $11) 21... Qxe5 $15 22. Qh5 Ba6 23. Rce1 Qa5 $2 {[%mdl 8192]} (23... Qd5 $1 $15 {stays ahead.} 24. Qf3 Rbd8) 24. b4 $2 (24. Rd1 $1 $18 Qe5 25. Nxg5 Qe3+ 26. Kh2 Bxd3 27. Nxf7) 24... Qxb4 (24... Qd5 $1 $11 25. Rf4 Bb7) 25. Qxg5 ({White must play} 25. Nxg5 $16 {[%csl Gg5][%cal Rh5h7]} Bxd3 26. Nxf7) 25... f5 {[#]} (25... f6 $1 $11 {keeps the balance.} 26. Qd5+ Kh8 27. Qh5+ Kg8 28. Qd5+ Kh8 29. Qh5+ Kg8 30. Qd5+) 26. Qh5 (26. Nc5 $1 $16 {[%mdl 512] Intending Re7 and mate.} bxc5 (26... Qxc5 27. Re7) 27. Re7) 26... fxe4 {The position is equal.} 27. Qd5+ {[%mdl 64] Double Attack} Kh8 28. Qh5+ Kg8 {Accuracy: White = 24%, Black = 43%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.11"]
[Round "4.6"]
[White "Sedlak, Nikola"]
[Black "Sokolov, Alexander"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2605"]
[BlackElo "2393"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,78,48,46,45,34,30,33,43,41,47,44,64,66,60,65,76,78,76,76,78,62,67,64,62,50,74,66,71,66,86,93,83,97,100,82,114,116,115,95,100,24,133,101,90,93,96,93,58,0,0,0,0,-4,-6,-496,-445,-5414,-5413,-1909,-5321,-5197,-5181]} 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. d4 c5 7. c4 cxd4 8. Nxd4 Qc7 9. O-O Nc6 10. Nc3 Bd7 {E65: King's Indian: Fianchetto: 6...c5 7 0-0 without d5 by White} 11. Rc1 Nxd4 (11... Qa5 12. Nd5 Nxd5 13. cxd5 Nxd4 14. Bxd4 Rfc8 15. Bxg7 Kxg7 16. Qd4+ f6 17. a4 b5 18. axb5 Qxb5 {1-0 (34) Huebner,R (2574)-Kovalenko,I (2684) Puhajarve 2016}) 12. Qxd4 Bc6 {White is slightly better.} 13. e4 Qb6 14. Qd2 a5 15. Nd5 Bxd5 $146 ({Predecessor:} 15... Nxd5 16. exd5 Bxb2 17. Qxb2 Bd7 18. Rfe1 Rae8 19. h4 f6 20. Kh2 {1-0 (44) Barros Rivadeneira,C (2116)-Martinez Alcantara,J (1995) Bogota 2011}) 16. exd5 Nd7 17. Bxg7 Kxg7 18. Rfe1 Rfe8 19. Re4 Nf6 20. Rh4 h5 21. Bf3 Rh8 22. Qb2 Rae8 23. Re1 Qc7 24. Rhe4 Kg8 25. R4e3 h4 {[#]} 26. g4 $1 h3 27. Bd1 Rh4 28. Rg3 b5 29. g5 (29. cxb5 $16 Qb6 30. a4) 29... Ne4 (29... Nd7 $11 {remains equal.}) 30. Rg4 Rxg4+ 31. Bxg4 Nxg5 32. Qd2 f6 33. f4 (33. cxb5 $14 e5 34. Rc1) 33... f5 $11 34. fxg5 fxg4 {KQR-KQR} 35. Re6 Qc5+ 36. Kh1 $2 {[%mdl 8192]} (36. Qf2 $1 $11 {and White has nothing to worry.} bxc4 37. bxc4) 36... Rf8 $19 {[%cal Rf8f1] Black is clearly winning.} 37. Qd3 {[#]} (37. Rxg6+ $142 Kf7 38. Re6 bxc4 39. bxc4 Qxc4 40. Kg1) 37... Rf2 $1 {[%cal Rf2h2]} 38. Re3 Kf7 {( -> ...bxc4)} 39. Rg3 bxc4 {Accuracy: White = 50%, Black = 62%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.12"]
[Round "5"]
[White "Zubov, Alexander"]
[Black "Nguyen, Piotr"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2605"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,69,44,32,43,10,31,33,127,98,119,66,84,53,52,46,46,34,31,45,37,53,54,66,83,77,108,103,107,97,115,114,326,263,265,260,398,475,467,453,475,452,485,478,652,650,626,619,740,737,736,727,715,706]} 1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Bc4 Nf6 5. Qe2 O-O 6. e5 dxe5 7. dxe5 Nd5 8. h3 Nb6 9. Bb3 c5 10. O-O Nc6 {B04: Alekhine's Defence: 4 Nf3} 11. c3 (11. e6 Bxe6 12. Bxe6 fxe6 13. Qxe6+ Kh8 14. c3 Qd5 15. Qxd5 Nxd5 16. Nbd2 Nf4 17. Ne4 Nd3 18. Rb1 {½-½ (96) Short,N (2678)-Adhiban,B (2655) Riadh 2017}) 11... c4 12. Bc2 f6 $146 (12... Be6 $14) ({Predecessor:} 12... Qc7 13. Bf4 e6 14. Na3 Ne7 15. Nb5 Qc5 16. Nd6 Ned5 17. Bg3 Rb8 18. Nd2 {1-0 (49) Dianov,A (2179)-Sosnin,M (2030) Krasnoyarsk 2012}) 13. Na3 Qd5 {[%cal Rc6e5]} 14. Bf4 ({White should play} 14. exf6 $16 exf6 15. Be3) 14... Nxe5 $14 15. Bxe5 fxe5 16. Rae1 {[%cal Rf3e5]} Bf5 $1 {[%cal Rf5d3] White should prevent ...Bd3.} 17. Nxe5 Rac8 18. Bxf5 Rxf5 19. Ng4 $36 {[%mdl 2048] Ne3 is the strong threat. White is pushing.} Rf7 20. Rd1 Qc6 21. Nc2 Nd5 {aiming for ...Nf4.} 22. g3 h5 23. Ne5 Qe6 24. Rfe1 Rf5 $2 (24... Qxe5 $16 {was necessary.} 25. Qxe5 Bxe5) 25. Nd4 Qxe5 26. Qd2 {[#]} Rd8 (26... Rxf2 $142 $1 {[%mdl 512]} 27. Kxf2 (27. Qxf2 Qd6 $18) 27... Qf6+ 28. Kg1 e5) 27. Rxe5 $18 Rxe5 {White is clearly winning.} 28. Nf3 Re6 29. Qg5 Red6 30. Nh4 Kf7 {[#]} 31. Rxd5 $1 {[%mdl 576] Deflection} Rxd5 32. Qxg6+ Kf8 33. Nf5 Rxf5 34. Qxf5+ Bf6 35. Qxh5 {Accuracy: White = 82%, Black = 41%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.12"]
[Round "5"]
[White "Sivuk, Vitaly"]
[Black "Pulpan, Jakub"]
[Result "1-0"]
[ECO "A06"]
[WhiteElo "2514"]
[BlackElo "2417"]
[Annotator "TA"]
[PlyCount "123"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,123,0,0,0,15,0,4,-2,9,9,2,14,34,42,52,0,0,0,0,-13,-13,-13,-6,-13,-12,-12,0,-11,60,0,12,13,17,15,7,0,120,120,151,133,231,222,285,269,267,236,341,327,322,445,444,438,439,442,455,442,441,0,420,413,419,290,424,429,421,350,412,459,396,429,503,455,489,454,454,446,446,433,370,337,435,97,97,0,387,334,2327,2192,2274,916,29972,29973,29973,29974,29974,29975,29975,29975,29973,29974,29976,29978,29978,29977,29977,29978,29977,29978,29978,29979,29975,29970]} 1. Nf3 d5 2. c4 e6 3. e3 Nf6 4. b3 Be7 5. Bb2 O-O 6. Nc3 c5 7. cxd5 Nxd5 8. Qc2 {A13: English Opening: 1...e6} Nc6 9. h4 b6 10. a3 {The position is equal.} h6 $146 ({Predecessor:} 10... f5 11. Bb5 Bb7 12. Nxd5 exd5 13. d4 Rc8 14. dxc5 bxc5 15. O-O Bf6 {1-0 (43) Karjakin,S (2760)-Anand,V (2762) Moscow 2016}) 11. g4 Nxc3 $1 12. dxc3 Bb7 {White must now prevent ...Ne5.} 13. Rh3 f5 {[#]} 14. gxf5 (14. g5 $1 $14 {[%mdl 512]}) 14... Rxf5 15. Bd3 {[#]} Rxf3 $1 {[%mdl 512]} 16. Bh7+ (16. Rxf3 Nd4) 16... Kh8 17. Rxf3 Nd4 18. cxd4 Bxf3 19. Be4 $1 {[%cal Re4f3]} Bxe4 20. Qxe4 {Hoping for dxc5.} cxd4 (20... Bf6 $11) 21. Rd1 ({White should play} 21. Bxd4 $14 Bf8 22. Kf1) 21... Bf6 22. Bxd4 Bxd4 23. Rxd4 $11 {[%mdl 4096] Endgame KQR-KQR} Qf8 24. Rd7 Rc8 (24... Rd8 $11 {keeps the balance.} 25. Qf4 (25. Qxe6 Rxd7 26. Qxd7 Qxa3 $11) (25. Rxa7 Qf6 $11) 25... Qe8 26. Rxd8 Qxd8) 25. Rxa7 $16 Qf6 26. Ra8 $1 {[%cal Ra8c8]} Qa1+ (26... Rxa8 $16 {keeps fighting.} 27. Qxa8+ Kh7) 27. Ke2 $18 {[%cal Ra8c8]} Qb2+ 28. Kf1 $1 {[%cal Ra8c8]} Qc3 29. Kg2 $40 {[%mdl 128] White attacks with force.} e5 (29... Qc7 {might work better.} 30. a4 Qd7) 30. a4 Rxa8 31. Qxa8+ {KQ-KQ} Kh7 32. Qe4+ Kh8 33. b4 Qc7 34. Kg3 Qc1 35. Kg2 Qc7 $1 36. b5 Qd6 37. Kg3 Qd1 (37... h5 $142 38. Qf5 g6) 38. Qxe5 Qg1+ 39. Kf3 $1 Qd1+ 40. Kf4 Qxa4+ 41. e4 Qa7 42. Qe8+ Kh7 43. Kf5 Qc7 44. Qg6+ Kh8 {intending ...Qc5+.} 45. Qe6 Kh7 46. h5 Qc5+ {[#]} 47. Qe5 $2 (47. Qd5 $1 $18 {[%cal Rd5c5] is the precise move to win. White wants to mate with Qxc5.} Qe7 48. Kg4) 47... Qc8+ $16 48. Qe6 $2 {[%mdl 8192]} (48. Kf4 $16 {Threatens to win with Qf5+.} Qc1+ 49. Kf5) 48... Qc5+ $18 {[#]} 49. Qd5 $1 {[%cal Rd5c5] Threatening mate with Qxc5.} Qxf2+ $2 (49... Qe7 50. f4 Qf6+ 51. Kg4 Qc3) 50. Ke6 Qf6+ 51. Kd7 g5 52. hxg6+ {White mates.} Kxg6 53. e5 Qg7+ 54. Kc6 Qa7 55. Qe6+ Kg5 56. Qf6+ Kg4 57. e6 Qa8+ 58. Kc7 Qa7+ 59. Kd6 Qa3+ 60. Kd7 Qd3+ 61. Ke8 Qxb5+ 62. Kf8 {Accuracy: White = 68%, Black = 40%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.12"]
[Round "5"]
[White "Stany, G.A."]
[Black "Dong, Bao Nghia"]
[Result "1/2-1/2"]
[ECO "C05"]
[WhiteElo "2507"]
[BlackElo "2180"]
[Annotator "TA"]
[PlyCount "185"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,185,37,33,18,34,46,0,0,0,14,0,12,4,17,19,24,-39,46,34,33,33,50,37,57,57,94,87,79,76,95,0,0,0,32,0,0,0,81,15,6,16,22,15,66,59,67,61,70,65,92,71,75,54,126,62,71,71,90,103,106,59,141,141,175,172,195,195,231,231,231,231,225,226,235,222,267,275,270,263,297,267,251,223,268,133,133,134,119,52,52,52,52,52,52,52,52,52,52,52,52,52,52,8,8,0,52,52,52,52,52,52,52,52,52,52,52,52,52,52,52,52,52,0,52,52,52,16,52,52,52,8,52,52,52,52,52,52,52,52,52,52,52,0,52,52,52,52,52,52,52,8,52,52,52,0,31,8,31,0,8,0,8,0,0,-8,-8,-8]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 f6 8. exf6 Nxf6 9. Nf3 Bd6 {C06: French Tarrasch: 3...Nf6 4 e5 Nfd7 5 Bd3 main lines} 10. O-O O-O (10... Qc7 11. g3 O-O 12. Bf4 e5 13. dxe5 Nxe5 14. Nxe5 Bxe5 15. Bxe5 Qxe5 16. Nf4 Bg4 17. f3 {½-½ (87) Tabatabaei,M (2605)-Chakravarthi,R (2442) Dubai 2018}) 11. Bf4 {LiveBook: 13 Games} Ng4 {White is slightly better.} 12. Bxd6 Qxd6 13. h3 $146 ({Predecessor:} 13. Ng3 e5 14. dxe5 Ncxe5 15. Nxe5 Nxe5 16. Qd2 Bg4 17. f4 Nxd3 18. Qxd3 {1-0 (58) Dory,J (2330)-Vogler,T (2295) Wiesbaden 1994}) 13... Rxf3 $1 {[%csl Gg4][%cal Rd6h2]} 14. hxg4 Rf7 15. f4 Bd7 16. g5 g6 17. Qd2 Raf8 18. g3 (18. Rf3 $11) 18... b5 (18... cxd4 $1 $15 19. cxd4 e5) 19. Kg2 b4 $1 20. Rab1 a5 21. Qe3 Qe7 22. Ng1 bxc3 23. bxc3 cxd4 24. cxd4 Qa3 {[#] Threatening ...Nb4.} 25. Rf2 (25. Rfe1 $1 $16) 25... e5 $1 $11 26. dxe5 {Black must now prevent Nf3.} Nxe5 27. Rb3 Qd6 {And now ...d4 would win.} 28. Rd2 Ng4 {[#]} (28... Nxd3 $11 29. Qxd3 Bf5) 29. Qb6 (29. Qd4 $1 $16) 29... Qxb6 30. Rxb6 Ne3+ 31. Kf2 Nc4 (31... Ng4+ $11 32. Kf1 Ne3+ 33. Kf2 Ng4+ 34. Kg2 Ne3+ 35. Kf2) 32. Bxc4 $1 $14 dxc4 33. Ne2 Rc8 34. Nc3 Bf5 35. a4 Bd3 36. Rdb2 h6 (36... Rd7 $14) 37. R2b5 (37. gxh6 $16 Kh7 38. R2b5) 37... hxg5 38. Rxg5 Rh7 39. Rxa5 Rh2+ 40. Ke3 Rg2 (40... Rc2 $14 41. Nd5 Re2+ 42. Kd4 Rd8) 41. Kf3 $16 Rd2 42. Nd5 Rf8 43. Rc5 Kg7 44. Rb7+ Rf7 45. Rcc7 Rxc7 46. Rxc7+ $18 {[%mdl 4096] Endgame KRB-KRN} Kf8 47. Ke3 Rg2 48. a5 {aiming for a6.} Ra2 49. Ra7 Ra3 50. Kd4 Bf1 51. Nc3 Ke8 52. a6 (52. Ra8+ $18 {has better winning chances.} Kd7 53. Ra6) 52... Ra5 $16 53. Ra8+ Kf7 54. Ne4 (54. Ke3 $16) 54... c3 $14 55. Nxc3 Rxa6 56. Rxa6 Bxa6 {KB-KN} 57. Ke5 Bc8 58. Ne4 {Nd6+ is the strong threat.} Kg7 59. Nf6 Kf7 60. g4 {[%cal Bg3g4,Bg4g5][%mdl 32]} Kg7 61. Ne8+ Kf8 62. Nf6 Kg7 $1 63. g5 Kf7 64. Kd6 Bf5 65. Nd7 Ke8 66. Ne5 Kf8 $1 67. Nc6 Kf7 68. Nd4 Bg4 69. Kd5 Bh3 70. Ke5 Bd7 71. Kd6 Bg4 72. Nc2 $1 Bc8 73. Kc7 Bf5 74. Ne3 Be6 75. Kd8 Bb3 76. Kd7 Be6+ 77. Kd6 Bh3 78. Nc4 Bf5 79. Ke5 {Intending Nd6+ and mate.} Ke7 80. Nd6 Bg4 81. Nc4 Bf5 $1 82. Ne3 Bh3 83. Nd5+ Kf7 84. Kd6 Bf5 85. Kc7 Be6 86. Nb4 Bh3 87. Nc2 ({White should play} 87. Kd6 $14) 87... Ke7 88. Ne3 Be6 89. Nc2 Bf5 {The position is equal.} 90. Ne3 Be4 91. Ng4 Ke6 92. Ne5 Kf5 93. Nxg6 {Precision: White = 52%, Black = 47%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.12"]
[Round "5"]
[White "Gasanov, Eldar"]
[Black "Stefansson, Hannes"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "2500"]
[BlackElo "2523"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,78,2,0,14,8,28,20,20,0,0,0,24,0,0,0,-7,-50,-37,-45,-39,-35,-30,-25,-28,-88,-91,-85,-23,-23,-20,-61,-87,-60,-69,-58,-47,-43,5,0,0,7,0,3,89,0,0,-60,-57,-56,-56,-53,0,-72,-72,-60,-58,-55,-55,-53,-58,-70,-70,-93,-135,-773,-766]} 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. a3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O d6 8. d3 Bd7 {A26: English Opening vs King's Indian with ...Nc6 and d3} (8... Nd4 9. Ne1 c6 10. b4 Re8 11. e3 Ne6 12. Bb2 h5 13. Nf3 Bd7 14. Rc1 Rc8 15. c5 Nf8 16. cxd6 Bg4 {½-½ (81) Caruana,F (2822)-Aronian,L (2767) Saint Louis 2018}) 9. Rb1 Rb8 10. b4 a6 {The position is equal.} 11. h3 b5 12. e4 Nd4 $146 ({Predecessor:} 12... h6 13. Be3 Be6 14. Qe2 Nh5 15. Nd5 Qd7 16. g4 {0-1 (37) Norwood,D (2460)-Landenbergue,C London 1986}) 13. Nxd4 exd4 14. Ne2 bxc4 15. Nxd4 (15. dxc4 {seems wilder.} Re8 16. Bg5 h6 17. Bxf6 Qxf6 18. Nf4) 15... cxd3 16. Qxd3 c5 17. bxc5 Rxb1 18. Qxb1 dxc5 19. Nb3 (19. Nc2 $11) 19... Bb5 $17 {White must now prevent ...Bd3.} 20. Re1 {[#]} Bd3 (20... c4 $1 $17 {[%cal Rc4b3]} 21. Nc5 Nd7) 21. Qa2 $1 $11 Qb6 {And now ...Bc4 would win.} 22. Nd2 c4 23. e5 Nd7 24. Nf3 Rb8 25. Bf4 Qb2 26. Qxb2 Rxb2 27. e6 fxe6 28. Rxe6 Bf8 (28... c3 $11) 29. Rxa6 ({White should try} 29. Rc6 $16) 29... Bc5 $36 {[%mdl 2048] Black has some pressure.} 30. Ne5 (30. Rc6 $11) 30... Bxf2+ $15 31. Kh2 Nb6 $1 {...Bd4 is the strong threat.} 32. h4 Bd4 (32... Bf5 $15 33. g4 Bc8) 33. Kh3 (33. Nxd3 $11 {remains equal.} cxd3 34. Kh3) 33... Bf5+ $17 34. g4 Be6 35. a4 Bd5 36. Bxd5+ Nxd5 37. Ra8+ Kg7 38. Bg3 {[#]} Rb3 $1 {aiming for ...Bxe5.} 39. Re8 $2 {[%mdl 8192]} (39. Kh2 $17 Ne3 40. Bf4) 39... Bf2 {Accuracy: White = 43%, Black = 54%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.12"]
[Round "5"]
[White "Cernousek, Lukas"]
[Black "Rakotomaharo, Fy Antenaina"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2429"]
[BlackElo "2409"]
[Annotator "TA"]
[PlyCount "37"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,37,13,15,16,35,22,68,70,72,81,75,64,79,83,106,69,72,68,75,72,48,40,54,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Qc7 8. a4 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} Nbd7 (8... Be7 9. Be2 O-O 10. O-O h6 11. a5 Be6 12. Nd5 Nxd5 13. exd5 Bf5 14. c4 Nd7 15. b4 Rac8 16. Rc1 Bh7 17. Nd2 f5 18. f3 Bg5 19. Qb3 Kh8 {½-½ (41) Anand,V (2773)-Korobov,A (2698) St Petersburg 2018}) 9. Nd2 Nc5 10. Bg5 $1 {White is slightly better.} Be6 $146 {[#]} ({Predecessor:} 10... Be7 11. Bxf6 Bxf6 12. Nd5 Qd8 13. b4 Ne6 14. Nc4 Be7 15. a5 {1-0 (51) Maia,V (2358)-De Souza,O (2253) ICCF email 2015}) 11. Bxf6 $1 gxf6 12. Qf3 Nd7 13. Bd3 Bh6 14. Nf1 Rg8 15. Nd5 Qc5 16. c3 f5 {[#] Strongly threatening ...fxe4.} 17. Ng3 $1 {[%cal Rg3f5]} Rg5 18. b4 (18. O-O $1 $14) 18... Qc8 $1 $11 {Threatens to win with ...Bxd5.} 19. Nxf5 {Accuracy: White = 88%, Black = 78%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.12"]
[Round "5"]
[White "Sokolov, Alexander"]
[Black "Kriebel, Tadeas"]
[Result "0-1"]
[ECO "C29"]
[WhiteElo "2393"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,52,-43,-15,-49,-10,-21,-24,-76,-68,-67,-59,-108,0,0,0,-58,-58,-57,-35,-27,-4,-46,-44,-339,-339,-491,-282,-279,-251,-640,-633,-644,-638,-637,-637,-731,-718,-734,-724]} 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. exd5 exf4 5. Nf3 Nxd5 6. Nxd5 Qxd5 7. d4 Be7 8. Bd3 g5 {LiveBook: 3 Games. C36: King's Gambit Accepted: 3 Nf3 d5} 9. Qe2 Nc6 {And now ...g4 would win.} (9... Bf5 10. Bxf5 Qxf5 11. c4 Nc6 12. d5 O-O-O 13. O-O Bc5+ 14. Kh1 Rhe8 15. Qd1 Nb4 16. Ne1 {0-1 (32) Kislinsky,A (2430)-Votava,J (2527) Czech Republic 2019}) 10. Be4 Qd6 {The position is equal.} 11. Bxc6+ (11. Bd2 $11 {keeps the balance.}) 11... Qxc6 $146 ({Predecessor:} 11... bxc6 12. Nxg5 Qxd4 13. Nf3 Qb6 14. Qe5 Rg8 15. Bxf4 Qb4+ 16. Bd2 {½-½ (49) Jonkman,H (2345)-Kroeze,F Leeuwarden 1993}) 12. Nxg5 O-O 13. d5 Qxd5 (13... Bb4+ $1 $17 14. c3 Bxc3+ $1 {[%mdl 512]} 15. Kf1 Qxd5 16. bxc3 Qxg5) 14. Qxe7 $11 {0-0 is the strong threat.} Qxg2 15. Qe4 ({But not} 15. Rf1 $2 Bh3 $19) (15. Nf3 $1 $11 Qxh1+ 16. Kf2) 15... Qxg5 $15 16. Bxf4 Qh4+ 17. Kd2 $1 {Hoping for Rag1+.} Qf2+ 18. Kc1 Bg4 {[%cal Bc8g4,Bg4f5,Bf5g6][%mdl 32] Threatens to win with ...Rae8.} 19. Bh6 $2 {[%mdl 8192]} ({Better is} 19. Bg3 $15 Qf5 20. Qxf5 Bxf5 21. Re1) 19... Bf5 $19 20. Qc4 (20. Qxf5 {only move.} Qxf5 21. Rg1+ Qg6 22. Rxg6+ fxg6 23. Bxf8 Rxf8 24. b3) 20... Rfe8 (20... Qg2 $142 21. Rd1 Rad8 $1 {[%mdl 512]} 22. Rxd8 Rxd8) 21. Qc3 {[%csl Gh6][%cal Rc3g7] [#]} Qg2 $1 $40 {[%cal Rg2h1][%mdl 128] Black is out for blood.} 22. Rd1 $2 (22. Qg3+ Qxg3 23. hxg3) 22... Re2 {[%cal Re2c2] Black is clearly winning.} 23. Bd2 Rd8 24. b3 Bg6 25. h4 h5 26. a4 Qf2 {Precision: White = 20%, Black = 79%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.13"]
[Round "6.1"]
[White "Stefansson, Hannes"]
[Black "Zubov, Alexander"]
[Result "1/2-1/2"]
[ECO "D71"]
[WhiteElo "2523"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "24"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,24,0,30,27,62,60,58,66,65,61,78,4,1,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. e3 (5. cxd5 cxd5 6. Nf3 Bg7 7. Ne5 O-O 8. Nc3 Bf5 9. O-O Ne4 10. Bf4 Nxc3 11. bxc3 Nc6 12. Nxc6 bxc6 13. Qa4 Qd7 14. Rac1 Rac8 15. Rfd1 Rfd8 16. c4 Be4 17. f3 Bf5 18. cxd5 cxd5 19. Qxd7 Bxd7 20. Bc7 Re8 21. e3 Bb5 22. Bf1 a6 {½-½ (22) Leko,P (2679)-Mamedyarov,S (2817) Germany 2019}) 5... dxc4 6. Nd2 {D71: Fianchetto Grünfeld: 3 g3 d5 sidelines and 5 cxd5 (without Nf3)} e5 $146 ({Predecessor:} 6... Be6 7. Qc2 b5 8. Ngf3 Bh6 9. O-O O-O 10. b3 cxb3 11. axb3 a5 12. Ne5 Ra6 {½-½ (44) Markus,R (2672)-Krasenkow,M (2630) Kocaeli 2017}) 7. dxe5 Ng4 8. Ngf3 {White is slightly better.} Bg7 9. O-O O-O 10. h3 (10. Nxc4 $16 Nd7 11. e6 (11. Qd4 b5 $14) 11... fxe6 12. Qc2) 10... Nxe5 $11 {The position is equal.} 11. Nxe5 Bxe5 12. Nxc4 Bg7 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.13"]
[Round "6.2"]
[White "Kriebel, Tadeas"]
[Black "Sivuk, Vitaly"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2507"]
[BlackElo "2514"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,116,25,48,26,16,25,36,19,45,0,8,0,12,-10,0,-15,15,22,19,22,41,29,41,26,19,0,0,0,0,0,0,0,0,0,39,36,37,39,34,44,35,33,28,34,55,37,92,52,65,40,36,37,37,41,40,8,8,8,8,9,8,8,10,10,10,10,10,5,31,5,10,0,0,0,0,0,5,5,5,5,5,5,5,0,5,5,5,5,5,5,5,5,5,5,5,5,6,5,6,5,5,5,6,6,6,0,0,0,0]} 1. e4 c6 2. d4 d5 3. e5 c5 4. Nf3 e6 (4... cxd4 5. Nxd4 e6 6. Nd2 Ne7 7. Bd3 Nec6 8. N2f3 Nxd4 9. Nxd4 Nc6 10. Nf3 Bc5 11. O-O h6 12. c3 a6 13. Re1 {1-0 (57) Jones,G (2682)-Indjic,A (2620) St Petersburg 2018}) 5. c3 Bd7 6. Be2 {B12: Caro-Kann: Advance Variation} Nc6 7. O-O Rc8 8. a3 {White is slightly better.} a6 $146 ({Predecessor:} 8... Nge7 9. b4 cxb4 10. axb4 a6 11. Nbd2 Ng6 12. Nb3 {1-0 (29) Kolosowski,M (2413)-Polak,R (1946) Karvina 2012}) 9. dxc5 Bxc5 10. b4 Ba7 11. c4 Nge7 12. Nc3 {[%cal Rc4d5]} O-O 13. cxd5 exd5 14. Nxd5 Bg4 15. Nxe7+ Qxe7 16. Bg5 Qe6 17. Nd4 Bxe2 $1 18. Nxe6 Bxd1 19. Nxf8 Bg4 20. h3 Bf5 21. g4 Bd3 22. Rfd1 Bc2 23. Nd7 $1 {[#] Hoping for Rd6.} Bxd1 24. Rxd1 Bd4 25. Kg2 Bxe5 26. Nb6 Rf8 27. Be3 f5 (27... f6 $14) 28. Nd7 Rf7 29. Nxe5 Nxe5 $14 {[%mdl 4096] Endgame KRB-KRN} 30. Rd8+ Rf8 31. Rd5 Ng6 32. Bd2 fxg4 33. hxg4 Nf4+ 34. Bxf4 $1 Rxf4 $11 {KR-KR} 35. Kg3 Rc4 36. Rd8+ Kf7 37. Rd7+ Kg8 38. f3 b5 39. Ra7 Rc6 {The position is equal.} 40. g5 h6 41. Kg4 hxg5 42. Kxg5 Rc3 43. Rxa6 {Strongly threatening f4.} Rxf3 44. Ra5 Kh7 45. Kg4 Rc3 46. Kf5 Kh6 47. Rxb5 Rxa3 48. Rb8 {[%cal Rb8h8] [#]} g6+ 49. Kf4 g5+ 50. Kg4 Kg6 51. Rb6+ Kf7 52. Kxg5 Ke7 53. Kf5 Kd7 54. Ke5 Kc7 55. Rb5 Kc6 56. Rc5+ Kb6 57. Ra5 Rxa5+ 58. bxa5+ Kxa5 {Accuracy: White = 54%, Black = 71%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.13"]
[Round "6.3"]
[White "Bernadskiy, Vitaliy"]
[Black "Salimova, Nurgyul"]
[Result "1/2-1/2"]
[ECO "D31"]
[WhiteElo "2581"]
[BlackElo "2414"]
[Annotator "TA"]
[PlyCount "121"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,121,-20,0,0,0,0,0,-6,13,16,16,8,12,3,19,4,5,16,56,32,38,27,27,0,0,0,63,76,78,62,70,64,66,56,45,29,20,25,11,0,0,0,58,0,0,0,0,0,0,0,45,59,60,59,31,21,102,88,90,97,140,24,115,-47,-8,-8,-8,-8,-8,-241,-7,-8,-8,-8,-8,-8,-8,-8,0,-50,-38,-48,-58,-54,-4,-4,-8,-8,59,23,684,127,143,131,945,896,1144,0,8,0,0,0,0,0,0,-22,0,0,0,0,0,0]} 1. c4 e6 2. Nc3 d5 3. d4 c6 4. e3 Nf6 5. Bd3 Nbd7 6. Nge2 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6} (6. a3 Bd6 7. c5 Bc7 8. f4 b6 9. b4 a5 10. Bd2 bxc5 11. bxc5 Ba6 12. Bxa6 Rxa6 13. Nge2 O-O {0-1 (51) Kuzubov,Y (2655)-Korobov,A (2698) Kiev 2018}) 6... Bd6 {LiveBook: 3 Games} 7. c5 Bc7 8. f4 b6 9. b4 {[%cal Bb2b4,Bb4b5,Bb5c6][%mdl 32]} a5 10. b5 $146 ({Predecessor:} 10. cxb6 Bxb6 11. b5 c5 12. a4 Bb7 13. O-O O-O {0-1 (47) Nguyen Thi Thuy,T (1915)-Nguyen,T (1847) Da Lat 2013}) 10... bxc5 11. bxc6 Nb8 $1 {[%cal Bd7b8,Bb8a6,Ba6b4][%mdl 32] Threatening ...c4.} 12. dxc5 O-O 13. Nd4 e5 14. fxe5 Bxe5 15. O-O Na6 16. Na4 Bg4 17. Qe1 Nb4 18. Bb1 Ne4 (18... Qc7 $1 $11 19. Qh4 h5) 19. a3 $1 $14 Na6 20. Bb2 {Threatens to win with Bxe4.} Naxc5 21. Nxc5 Nxc5 22. h3 Bc8 23. Ne6 Nxe6 24. Bxe5 Ba6 25. Rf5 f6 26. Bc3 Qe8 (26... Bc4 $1 $11) 27. Bxa5 (27. Rxd5 $14 Qxc6 28. Rxa5) 27... Qxc6 $11 28. Bb4 Rfe8 29. Ba2 Rad8 30. Rc1 Qa8 31. Qg3 Kh8 32. Bb1 $1 Rc8 33. Rd1 d4 (33... Ng5 $1 $11 {remains equal.}) 34. Ra5 Qb7 35. Qh4 {[%csl Gb1][%cal Rh4h7]} h6 36. Qh5 (36. exd4 $16 Bc4 37. Qg4) 36... Ng5 ({Not} 36... dxe3 $2 37. Qg6 $18) (36... d3 $1 $11) 37. Rxd4 $2 (37. h4 $16 Ne4 38. exd4) 37... Rc1+ 38. Kh2 $1 $132 {[%cal Rh5e8,Bg1h2,Bh2g3,Bg3g4,Bg4f5,Bf5e6,Be6e7][%mdl 2080] White is fighting back} Qb8+ 39. Bd6 Qxb1 40. Qxe8+ Kh7 {( -> ...Rh1+)} 41. Rxg5 $1 (41. Rxa6 Rh1+ 42. Kg3 Qe1+ 43. Kg4 Qf2 $19) 41... Rh1+ 42. Kg3 Qe1+ 43. Kg4 Be2+ 44. Kf5 {Threatening mate with Qg6+.} Qa5+ 45. Ke6 {White wants to mate with Qg6+.} (45. Be5 $5 hxg5 46. Qg6+ Kh8 47. Qe8+ Kh7 48. Qg6+ Kh8 49. Qe8+ Kh7 $11) 45... Qxg5 46. Bf4 Qxg2 47. Ke7 Rb1 {Black wants to play ...Bf3.} 48. Kf8 $1 Bb5 49. Qe7 {Hoping for Bc7.} Rc1 ({Black should try} 49... Rg1 $1 $11) 50. Rd8 $14 {Black should prevent e4.} Bc4 $2 {[%mdl 8192] [#]} (50... Qg6 $11) 51. h4 $2 (51. Qc7 $1 $18 {is the precise move to win. Intending Bg3 and mate.} f5 52. Be5) 51... Rb1 $16 {[#]} 52. e4 $1 {Black must now prevent Rc8.} Rf1 $2 {[%mdl 8192]} (52... Qg6 $16) 53. Qc7 $18 Be6 54. Bg3 $2 ({White should play} 54. Re8 $18) 54... Kg6 $11 {The position is equal.} 55. Qxg7+ Kh5 56. Qe7 {aiming for Qe8+.} Qxe4 57. Re8 Rf3 58. Qd6 Re3 {Strongly threatening ...Qg4.} 59. Bf4 Re2 60. a4 Qxa4 (60... Qf5 $5 61. Re7 $8 Qg4 $11) 61. Qc5+ {Precision: White = 69%, Black = 47%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.13"]
[Round "6.4"]
[White "Popovic, Dusan"]
[Black "Plischki, Sebastian"]
[Result "1-0"]
[ECO "B04"]
[WhiteElo "2511"]
[BlackElo "2397"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,59,22,18,31,22,28,11,16,20,47,31,52,18,32,19,47,27,78,78,119,112,185,179,178,182,177,170,408,340,832,845,844,843,806,750,1256,1216,1539,1539,1537,1483,1457,1445]} 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. O-O O-O 8. Re1 Nc6 9. exd6 cxd6 10. c3 Bf5 {B04: Alekhine's Defence: 4 Nf3} (10... e5 11. dxe5 dxe5 12. Qxd8 Rxd8 13. Ng5 Rf8 14. Ne4 Na5 15. Bg5 Nxb3 16. axb3 f6 17. Be3 Bf5 18. Nd6 {1-0 (50) Stevic,H (2587)-Dimitrov,R (2534) Skopje 2018}) 11. a4 a6 $146 ({Predecessor:} 11... Qc7 12. a5 Nd7 13. a6 e5 14. axb7 Qxb7 15. Bd5 Nb6 16. Bxc6 Qxc6 17. dxe5 dxe5 18. Nxe5 {1-0 (71) Lizorkina,V (1761)-Razumov,A (1475) LSS email 2011}) 12. Bg5 d5 {The position is equal.} 13. Nbd2 f6 14. Bf4 Na5 15. Ba2 Rc8 16. Qe2 Re8 17. b4 Nac4 (17... Nc6 $1 $11 {keeps the balance.}) 18. a5 $16 {[%cal Ba4a5,Ba5b6][%mdl 32]} Nxd2 19. axb6 Nxf3+ (19... Ne4 $16) 20. Qxf3 $18 e6 21. Bc7 $1 $36 {[%cal Rc7d8][%mdl 2048] White is on the roll.} Qd7 22. Bb3 Qb5 $2 {[#]} (22... Qf7 23. g4 Be4 24. Rxe4 dxe4 25. Qxe4 Rxc7 26. bxc7 Qxc7) 23. c4 $1 {[%mdl 512]} dxc4 $2 (23... Qxb4 24. cxd5 Bg4 25. Qxg4 Qxb3) 24. Ba4 {[%mdl 64] Skewer. White is clearly winning.} Qxb4 25. Bxe8 Rxe8 26. Qxb7 c3 27. Qc6 Kf7 28. Bd6 {[#] Threatening mate with Qd7+.} Qb5 29. Qxb5 axb5 30. Ra7+ {Accuracy: White = 83%, Black = 28%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.13"]
[Round "6.5"]
[White "Rakotomaharo, Fy Antenaina"]
[Black "Stany, G.A."]
[Result "0-1"]
[ECO "E44"]
[WhiteElo "2409"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,64,29,34,34,23,23,20,23,22,27,23,23,22,22,27,39,48,74,15,8,-72,-66,-43,-56,-69,-60,-56,-37,-44,-35,-39,-43,-38,-45,-51,-36,-69,-70,-100,-100,-262,-266,-260,-277,-271,-235,-224,-216,-604,-619,-545,-555]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 c5 6. a3 Ba5 7. Rb1 Na6 8. Ng3 Bb7 {E42: Nimzo-Indian: Rubinstein: 4...c5 5 Ne2} 9. f3 O-O 10. Bd3 d5 {The position is equal.} 11. O-O Bxc3 (11... cxd4 12. Nb5 dxc4 13. Bxc4 Rc8 14. Qe2 Bd5 15. Bxd5 Qxd5 16. e4 {1-0 (63) Tomashevsky,E (2728)-Caruana,F (2787) Wijk aan Zee 2016}) 12. bxc3 Rc8 13. cxd5 $146 ({Predecessor:} 13. Qe2 Nb8 14. cxd5 Nxd5 15. Bd2 cxd4 16. cxd4 {0-1 (52) Michalski,F (2151)-Cukrowski,F (2367) Poronin 2016}) 13... Nxd5 14. Ne2 cxd4 15. cxd4 Nb8 {[%cal Ba6b8,Bb8c6,Bc6d4][%mdl 32]} 16. Rb3 ({Better is} 16. Bd2 $16) 16... Nc6 $11 17. e4 {[#]} (17. Bd2 $11 {remains equal.}) 17... Nxd4 $1 $17 18. exd5 Nxb3 19. Qxb3 Qxd5 20. Qb1 Qc5+ 21. Kh1 h6 22. Bb2 Rfd8 23. Ng3 Rd7 24. Rc1 Qa5 25. Bc2 Qd2 $36 {[%mdl 2048] Black has good play.} 26. Bh7+ Kh8 {( -> ...Rxc1+)} 27. Rg1 $2 {[#]} (27. Rxc8+ $17 {was the only chance.} Bxc8 28. Bc2) 27... f5 $1 $19 28. Nxf5 Kxh7 29. Nxg7+ Qc2 30. Nxe6 Rd2 {aiming for ...Qxb1.} 31. Be5 $2 (31. Qxc2+ Rcxc2 32. Be5) 31... Qxb1 32. Rxb1 Re2 {Accuracy: White = 28%, Black = 86%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.13"]
[Round "6.6"]
[White "Dong, Bao Nghia"]
[Black "Gasanov, Eldar"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "2180"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,106,13,6,-8,-4,-24,-27,-30,-12,-16,-16,-66,-42,-46,-59,-56,-58,-135,-128,-129,-137,-134,-135,-313,-147,-168,-162,-187,-189,-185,-180,-198,-154,-155,-154,-144,-154,-162,-162,-199,-195,-164,-186,-186,-195,-187,-182,-225,-212,-217,-213,-206,-160,-160,-157,-189,-190,-194,-192,-247,-255,-431,-411,-428,-378,-399,0,-314,0,-369,-250,-349,-337,-408,-410,-559,-533,-550,-533,-609,-590,-617,-609,-686,-643,-904,-789,-935,-916,-1427,-1375,-6065,-6049,-29987,-29988,-29992,-29993,-29997,0]} 1. d4 d6 2. Nf3 g6 3. Bf4 Bg7 4. c3 Nd7 5. e4 e5 6. dxe5 {A41: 1 d4 d6: Tartakower System and Modern Defence} dxe5 7. Bg5 Ngf6 8. Bc4 {Black has an edge.} h6 9. Bxf6 (9. Bh4 Qe7 10. Nbd2 g5 11. Bg3 Nh5 12. Nf1 Nf4 13. Ne3 {1-0 (45) Rakhmangulov,A (2308)-Zubarev,A (2506) Lutsk 2017}) 9... Qxf6 10. Na3 $146 ({Predecessor:} 10. Nbd2 O-O 11. Qe2 Nc5 12. O-O Ne6 13. Bxe6 Qxe6 {0-1 (30) Pes Mateo,A (1955)-Valles Mata,D (2221) Aragon 2017}) 10... Nc5 11. Nd2 O-O 12. b4 Ne6 13. g3 ({White should try} 13. Nc2 $15) 13... a5 $17 {Hoping for ...axb4.} 14. Nc2 axb4 15. cxb4 Rd8 16. Qf3 $2 {[#]} (16. Qe2 $17) 16... Qe7 (16... Rxd2 $1 $19 {[%mdl 512] and Black stays clearly on top.} 17. Qxf6 (17. Kxd2 Qxf3) 17... Rxc2) 17. h4 h5 18. Nb3 Nd4 19. Nbxd4 exd4 20. Qd3 Be6 21. Bxe6 Qxe6 22. O-O Rxa2 23. Rxa2 Qxa2 24. f4 Qb2 25. e5 Qc3 26. Rd1 {aiming for Qxc3.} Qxd3 27. Rxd3 $19 {[%mdl 4096] Endgame KRB-KRN} f6 28. exf6 Bxf6 29. Kf2 Kf7 30. Kf3 Ke6 31. Ke4 Re8 32. Ra3 Kd7+ 33. Kd3 {[#]} Re6 $1 34. Ra8 {[#]} (34. b5 {was called for.}) 34... Rc6 $1 35. Rf8 $2 (35. Ra3) 35... Rc3+ 36. Kd2 Ke6 37. Rc8 Kd7 38. Rf8 Ke6 ({Don't take} 38... Rxg3 39. Rf7+ Kd6 40. b5 $19) 39. Rc8 c6 40. Rc7 b5 ({Don't play} 40... Rxg3 41. Rxb7 Rg4 42. Rb6 $19) 41. Ne1 {White hopes to continue with Nd3.} Bd8 42. Rc8 Kd7 43. Ra8 Rxg3 44. Nd3 Rg2+ 45. Kd1 Bxh4 46. Ne5+ Kd6 47. Ra6 Kd5 48. Rxc6 g5 49. Rc5+ Ke4 50. f5 d3 51. Nf3 Kxf3 {Black mates.} 52. f6 Ke4 53. f7 Rg4 $2 {[%mdl 32768] Accuracy: White = 40%, Black = 69%. . Loss on time!?} (53... Rg1+ {mates} 54. Kd2 Be1+ 55. Kd1 Bxb4#) 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.14"]
[Round "7.1"]
[White "Sivuk, Vitaly"]
[Black "Stefansson, Hannes"]
[Result "0-1"]
[ECO "C26"]
[WhiteElo "2514"]
[BlackElo "2523"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,74,0,-7,0,-8,31,28,35,14,37,0,0,-19,-27,-31,-28,-64,-73,-85,-82,-65,-76,-134,-107,-180,-148,-308,-295,-312,-307,-287,-268,-346,-338,-383,-359,-373,-337,-327,-217,-224,-214,-215,-221,-222,-203,-196,-206,-211,-209,-224,-217,-279,-241,-378,-368,-368,-368,-662,-507]} 1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Bc5 7. Nf3 Nc6 8. O-O O-O 9. Re1 Bb6 {C47: Scotch Four Knights and Four Knights with 4 g3} (9... Qf6 10. d3 h6 11. Rb1 Bb6 12. Be3 Bg4 13. h3 Be6 14. c4 e4 15. Nd2 exd3 16. c5 Ba5 17. Rxb7 Nb4 18. cxd3 Bd5 19. Rxb4 Bxg2 {½-½ (31) Nakamura,H (2787)-Xiong,J (2665) Saint Louis 2018}) 10. Nxe5 Bxf2+ 11. Kxf2 Nxe5 {White has an edge.} 12. d4 Nc4 13. Qd3 $146 ({Predecessor:} 13. Qh5 c6 14. Qc5 Be6 15. Bf4 Bd5 16. Rab1 b6 17. Qe7 Bxg2 18. Qxd8 Raxd8 19. Kxg2 {0-1 (66) Blit,J (2310)-Bispo,L (2192) Santos 2011}) 13... Nd6 14. Re5 Be6 15. Ba3 Qd7 16. Bxd6 cxd6 17. Rb5 Rab8 18. a4 Rfc8 {...Bc4 is the strong threat.} 19. Rh5 ({White should try} 19. Rbb1) 19... h6 20. h3 (20. Qd2 $17) 20... Qc7 21. Ra3 $2 {[#]} (21. Bf1 $17 {is a better defense.}) 21... Bc4 $19 22. Qd2 Re8 23. Bf3 Re6 24. Ra1 Rbe8 25. Kg1 Re3 26. Rf5 Qd7 27. g4 Qe7 28. Re5 Rxe5 ({Not} 28... dxe5 29. Qxe3 Qc7 30. Re1 $15) 29. dxe5 Qxe5 30. Kg2 b6 {[%cal Bb7b6,Bb6b5][%mdl 32]} 31. Qd4 Qxd4 32. cxd4 {[%mdl 4096] Endgame KRB-KRB} Re3 33. a5 b5 34. a6 Kf8 35. Bc6 (35. h4 $142) 35... Re2+ 36. Kg3 Rxc2 37. Rb1 $2 {[#]} (37. Re1 Rc3+ 38. Kh2) 37... Ba2 {Accuracy: White = 33%, Black = 91%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.14"]
[Round "7.2"]
[White "Zubov, Alexander"]
[Black "Kriebel, Tadeas"]
[Result "1/2-1/2"]
[ECO "D20"]
[WhiteElo "2605"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "33"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,33,20,0,0,10,5,-26,0,-1,-9,-17,-20,-21,0,0,14,0]} 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Qe2 c5 6. dxc5 Bxc5 7. Nf3 a6 8. O-O O-O 9. e4 b5 10. Bd3 {Black must now prevent e5.} Nc6 {D26: Queen's Gambit Accepted: 4 e3 e6 5 Bxc5 c5 sidelines} 11. Nbd2 e5 12. Nb3 Bb6 {Black has an edge.} (12... Ba7 13. Be3 Bg4 14. Rfd1 Qe7 15. Rac1 Nd4 16. Nbxd4 Bxd4 17. Bxd4 exd4 18. h3 Bxf3 19. Qxf3 Rfe8 20. Qf4 Nh5 21. Qf3 Nf6 22. Qf4 {½-½ (22) Can,E (2605)-Solodovnichenko,Y (2568) Rome 2017}) 13. Be3 {The position is equal.} Be6 14. Rfd1 Bxb3 $146 ({Predecessor:} 14... Nd7 15. Rac1 Rc8 16. h3 f6 17. Qd2 Bxe3 18. Qxe3 {½-½ (30) Husemann,A (1993)-Schlotterbeck,P (2120) LSS email 2012}) 15. axb3 {[#] Hoping for Bxb5.} Bxe3 16. Qxe3 Ng4 17. Qe1 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.14"]
[Round "7.3"]
[White "Stany, G.A."]
[Black "Popovic, Dusan"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2507"]
[BlackElo "2511"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,77,43,62,39,44,48,82,90,95,83,103,114,112,115,114,113,111,104,106,104,112,114,110,110,105,116,106,115,141,123,142,68,164,97,127,66,166,146,177,183,170,173,230,226,307,222,317,202,1853,1386,29992,29993,29995,29996]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Be7 9. Qd2 O-O 10. O-O-O Qc7 11. g4 Rc8 12. g5 Nh5 13. Kb1 Nd7 14. Rg1 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} Nb6 15. Qf2 Bd8 16. h4 {White is better.} g6 17. Rg2 {[#]} Nc4 $146 ({Predecessor:} 17... Qc6 18. f4 exf4 19. Bxf4 Nxf4 20. Qxf4 Be7 21. h5 Bf8 {1-0 (45) Van Oosterom,J (2725)-Hefka,V (2574) ICCF corr 2003}) 18. Bxc4 $1 Bxc4 19. Qd2 Be7 20. Na4 $1 d5 21. exd5 Bxd5 22. Bb6 (22. Qxd5 $6 Rd8 $11) 22... Qc6 23. Qxd5 Qxa4 24. Qd7 Qc6 25. Qxe7 {Rd6 is the strong threat.} Qxb6 26. Qxe5 a5 27. Rd6 Qc7 28. Rgd2 ({White should try} 28. Re2 $16) 28... Qc4 {[#]} (28... a4 $14) 29. Qd5 ({Better is} 29. R6d4 $1 $18 {[%cal Rd4c4]} Qf1+ 30. Rd1 Qxf3 31. Nxa5) 29... Qxh4 $16 {[#]} 30. Rd7 (30. Nc5 $1 $16) 30... Qe1+ (30... Rf8 $1 $14) 31. Rd1 $18 Qe8 32. Nxa5 ({Don't do} 32. Qxb7 $6 a4 $16) 32... Nf4 33. Qd2 $40 {[%mdl 128] White wants a kill.} Qe5 (33... Qe6 $142 34. Re1 (34. Qxf4 Rxa5 35. a3 Re8 $16) (34. Rxb7 Qf5 $14) 34... Qf5) 34. Nxb7 Rab8 35. a4 Ne6 (35... Qxg5 $142 36. Nd6 Qf6) 36. Re1 Qg3 $2 {[#]} (36... Qxg5 37. Qxg5 Nxg5) 37. Rxe6 $1 fxe6 38. Qd4 {[%csl Gd7][%cal Rd4g7]} Qe1+ 39. Ka2 {Accuracy: White = 67%, Black = 28%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.14"]
[Round "7.4"]
[White "Gasanov, Eldar"]
[Black "Sedlak, Nikola"]
[Result "0-1"]
[ECO "A91"]
[WhiteElo "2500"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "176"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,176,28,28,37,31,41,33,34,19,39,9,29,18,18,28,28,-8,0,0,17,32,35,22,17,-9,-9,-256,-280,-272,-278,-479,-479,-468,-469,-508,-489,-457,-445,-451,-437,-454,-441,-516,-510,-593,-591,-597,-585,-559,-490,-488,-271,-494,-490,-494,-489,-478,-448,-465,-451,-455,-460,-458,-436,-265,-8,-8,-8,-8,-8,-8,-8,-11,-40,-47,-8,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-86,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,0,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,-8,-8,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,-47,-53,-54,0,-47,-47,-54,0,-55,-47,-47,-48,-48,-48,-48,-48,-72,-55,-88,-93,-29969,-29970,-29972,-29973,-29973,-29974,-29974,-29975,-29980,-29981,-29981,-29982,-29982,-29983,-29983,-29984]} 1. d4 e6 2. c4 f5 3. g3 Nf6 4. Bg2 Be7 5. Nf3 d5 6. O-O Ne4 {A92: Classical Dutch: Classical Stonewall (with ...Be7): Early deviations} 7. Nc3 c6 8. Qc2 (8. Nd2 Nd6 9. b3 Nd7 10. a4 h5 11. b4 h4 12. b5 hxg3 13. hxg3 Nf6 14. Qb3 {0-1 (37) Riazantsev,A (2651)-Rapport,R (2692) Palma de Mallorca 2017}) 8... Nd7 {White is slightly better.} 9. Rb1 a5 10. a3 O-O 11. Bf4 g5 $146 ({Predecessor:} 11... Qe8 12. b4 Qh5 13. c5 axb4 14. axb4 g5 15. Bc1 Bf6 16. Rd1 g4 {1-0 (46) Melnichuk,M (2118)-Tchoubar,V (2313) Kiev 2006}) 12. Be3 Nd6 13. b3 dxc4 14. Ne5 cxb3 (14... a4 {feels hotter.} 15. Nxc4 axb3 16. Qxb3 Nxc4 17. Qxc4 Nb6) 15. Qxb3 f4 16. gxf4 ({Don't play} 16. Qxe6+ Kh8 $11) 16... gxf4 17. Qxe6+ Kh8 18. Nxd7 $2 (18. Bc1 $11) 18... Rf6 $1 $19 {[%cal Rf6e6]} 19. Qe5 Nc4 $1 {[%cal Rc4e5]} 20. Qh5 $2 (20. Qe4 Bxd7 21. d5 Nxe3 22. fxe3) 20... Bxd7 ({Less strong is} 20... Qxd7 21. Bc1 $17) 21. Bc1 Rg6 22. h3 ({But not} 22. Rxb7 Bg4 $19) 22... Qg8 23. Qf3 {[#]} Rxg2+ $1 {[%mdl 576] Remove Defender} 24. Qxg2 Bxh3 $1 {[%csl Gh3][%cal Rg8g2]} 25. Qxg8+ Rxg8+ 26. Kh2 Bxf1 27. Rxb7 Bh4 28. Bxf4 Bxf2 {( -> ...Rg4)} 29. Ne4 Bg1+ 30. Kh1 Bg2+ 31. Kxg1 Bxe4+ 32. Kf2 Rg2+ 33. Kf1 Rg6 34. Kf2 h5 35. Re7 Rg2+ 36. Kf1 Bd5 37. e4 Rg7 $2 (37... Rg4 $19 38. Be5+ Nxe5 39. exd5 Rxd4 40. Rxe5 Rxd5) 38. Rxg7 $11 Kxg7 39. exd5 cxd5 {[%mdl 4096] Endgame KB-KN} 40. a4 $1 Kf6 41. Kf2 Ke6 42. Kg3 Kd7 (42... Kf5 $5 {[%cal Rf5e4]} 43. Kf3 h4 $17) 43. Kh4 (43. Bg5 $11 {keeps the balance.}) 43... Kc6 $1 $17 44. Bc1 Kb7 $1 {[%cal Rb7a6]} 45. Kxh5 {[#]} Nb6 $1 46. Kg4 Nxa4 47. Kf3 Kb6 48. Ke3 Nc3 49. Kd3 Nb5 50. Be3 Kc6 51. Kc2 a4 52. Kb2 Nd6 53. Bf4 {Threatening Bxd6.} Nf5 54. Ka3 Kb5 (54... Nxd4 $2 55. Kb4 $19) 55. Be5 Ne3 56. Bg7 Nc4+ 57. Ka2 Kb4 58. Bf8+ $1 Kc3 59. Bg7 $1 Kb4 60. Bf8+ Ka5 61. Be7 Nd2 62. Ka3 Nf3 63. Bf6 Ne1 {And now ...Nf3 would win.} 64. Bg7 Nc2+ 65. Kb2 Nb4 66. Ka3 Nc6 67. Bf6 Kb5 68. Bg7 Na5 69. Bf6 Nc4+ 70. Ka2 Kb4 {White must now prevent ...Na5.} 71. Be7+ Kc3 72. Bf6 $1 Kb4 73. Be7+ Ka5 74. Bd8+ Kb5 {...Ne3 is the strong threat.} 75. Bf6 $1 Ne3 {Hoping for ...Kb4.} 76. Ka3 $1 Ng4 77. Bg7 Ka5 {Strongly threatening ...Ne3.} (77... Ne3 $2 78. Bh8 $19) 78. Bf8 Ne3 {Threatens to win with ...Nf5.} 79. Bg7 Nc4+ 80. Ka2 Nd6 {aiming for ...Nf5.} 81. Bf6 $2 {[%mdl 8192] [#]} (81. Be5 $17 Nb5 82. Kb2) 81... Nb5 $1 {Black mates.} 82. Bd8+ Kb4 83. Be7+ Kc4 84. Bf6 a3 85. Be7 Kxd4 86. Kb3 Ke4 87. Bg5 d4 88. Bc1 d3 {Accuracy: White = 60%, Black = 73%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.14"]
[Round "7.5"]
[White "Bakhmatsky, Vladislav"]
[Black "Van den Doel, Erik"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2419"]
[BlackElo "2610"]
[Annotator "TA"]
[PlyCount "149"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,149,19,20,6,29,34,22,15,28,6,6,0,8,1,31,17,68,50,56,64,85,104,79,0,126,109,127,143,247,148,147,135,147,143,138,23,142,141,113,72,85,85,90,90,104,67,60,67,63,63,69,70,75,60,66,99,166,158,176,151,217,204,206,193,193,193,193,193,193,193,193,192,202,197,225,228,227,228,222,202,219,220,214,217,209,209,226,217,227,220,228,208,212,193,198,193,241,241,291,259,360,360,416,402,409,411,409,417,402,389,387,380,411,403,564,564,625,460,393,373,485,441,29963,29969,29968,29970,29969,29971,29970,29972,29968,29971]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 h6 7. Re1 O-O 8. Nbd2 a6 9. Bb3 Ba7 10. h3 Be6 11. Bc2 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} (11. Nf1 Re8 12. N3h2 Qd7 13. Qf3 Kh7 14. Ng3 d5 15. Bc2 d4 16. Nf5 Bxf5 17. exf5 e4 18. dxe4 Ne5 19. Qd1 d3 20. Bb3 {0-1 (29) Andriasian,Z (2603)-Nakamura,H (2763) chess.com INT 2018}) 11... Nd7 12. Nf1 f5 13. exf5 {The position is equal.} Bxf5 ({Don't go for} 13... Rxf5 $2 14. d4 $16) 14. Ng3 $146 ({Predecessor:} 14. Bb3+ Kh8 15. Ne3 Bh7 {1-0 (43) Capote Robayna,J (1695)-Guerra Arrocha,D (1549) Granada 2009}) 14... Bg6 15. Be3 Kh8 (15... Qf6 {feels hotter.} 16. Bb3+ Kh8 17. Bxa7 Rxa7 18. d4 Raa8) 16. d4 Bxc2 (16... Qf6 {keeps more tension.} 17. Bxg6 Qxg6 18. Nh4 Qf7 19. Qc2 exd4 20. cxd4 Rfe8) 17. Qxc2 Rxf3 (17... Qf6 $11) 18. gxf3 $14 exd4 19. cxd4 Nxd4 20. Bxd4 Bxd4 21. Kg2 (21. f4 $16) 21... c5 (21... Qf6 $1 $11 {remains equal.}) 22. Qf5 $16 Ne5 23. f4 Nd7 (23... Nc4 $16) 24. Re2 (24. Qf7 $1 $18 Nb6 25. Nf5 (25. Qxb7 Rb8 $16)) 24... Nf6 {[#]} 25. Rae1 $1 Qg8 26. Re6 Rf8 27. Nh5 (27. Rxd6 $16 {aiming for Re7.} Qxa2 28. Re7) 27... Bxb2 (27... Nxh5 $11 {keeps the balance.} 28. Qxh5 Be5) 28. Nxf6 Bxf6 29. Qg6 Qf7 30. Qxf7 Rxf7 31. Rxd6 {[%mdl 4096] Endgame KRR-KRB} Rc7 32. Rb6 {Hoping for Re8+.} c4 33. Reb1 c3 34. Rxb7 c2 35. Rb8+ Kh7 36. Rc1 Kg6 37. Kf3 Kf5 (37... Rc4 $16) 38. Rb3 $18 Rc4 39. Ke2 Bh4 (39... g5 $16 40. Kd3 Rd4+ 41. Kxc2 Rxf4) 40. Rb2 Rxf4 41. f3 Bf6 42. Rbxc2 Rh4 43. Rh1 Ra4 44. Kf2 Kf4 45. Rb1 h5 46. Rb3 Bd4+ {[#]} 47. Kg2 $1 Bf6 48. Re2 Kf5 49. Rbe3 Bg5 50. Re5+ Kg6 51. R5e4 Ra3 52. Rb4 Kf5 53. Rb3 Ra5 54. a3 {[%cal Ba2a3,Ba3a4][%mdl 32]} Bf6 55. Re4 Rc5 56. a4 Rc2+ 57. Kg1 Rd2 58. Rbb4 Be5 59. Rbc4 Bd6 60. Kf1 Rh2 61. Rcd4 Bg3 62. Rd5+ Kf6 63. Rxh5 Rf2+ 64. Kg1 Rxf3 65. Kg2 Ra3 66. Ra5 g5 67. Rc4 Be5 68. h4 gxh4 69. Rxh4 Ra2+ 70. Kf3 Rb2 (70... Bc3 $18) 71. Rh6+ {White mates.} Kg7 72. Rhxa6 Bf6 73. Rb5 Ra2 74. Rb7+ Kg6 75. Rbb6 {Accuracy: White = 77%, Black = 44%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.14"]
[Round "7.6"]
[White "Pulpan, Jakub"]
[Black "Bernadskiy, Vitaliy"]
[Result "0-1"]
[ECO "C04"]
[WhiteElo "2417"]
[BlackElo "2581"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,84,9,13,10,2,10,31,20,63,55,63,48,34,41,37,56,86,83,102,77,95,18,16,0,0,0,47,0,0,0,0,0,0,0,0,0,2,-35,-35,-65,-58,-67,-65,-124,-124,-119,-119,-119,-114,-114,-88,-83,-87,-123,-119,-235,-225,-341,-222,-239,-232,-216,-234,-260,-242,-225,-243,-497,-495,-441,-435,-418,-404,-1328,-947,-877,-896]} 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. exd5 exd5 6. Bb5 {C04: French Tarrasch: 3...Nc6} (6. c3 Bd6 7. Bd3 O-O 8. O-O Ne7 9. Ne5 c5 10. Re1 cxd4 11. cxd4 Bf5 12. Nf1 Bxd3 13. Qxd3 Ne4 14. Ng4 f5 15. Nge3 Kh8 16. f3 {0-1 (60) Hammer,J (2628)-Shaposhnikov,E (2557) chess.com INT 2017}) 6... Bd6 7. Qe2+ Be6 8. Ng5 $146 {White is slightly better.} ({Predecessor:} 8. Ne5 O-O 9. Nxc6 bxc6 10. Bxc6 Rb8 11. Nf1 Rb6 12. Ba4 Rb4 13. Bb3 Rxd4 {½-½ (47) Player,E (2122)-Potts,A (2274) Birmingham 2006}) 8... O-O 9. Nxe6 fxe6 10. Bxc6 bxc6 11. Qxe6+ Kh8 12. O-O Qe8 13. Qxe8 Raxe8 {[#]} 14. c4 $1 Re2 {[#]} 15. cxd5 ({White should play} 15. c5 $1 $16 {[%cal Rc5d6]} Be7 16. b4) 15... cxd5 $11 16. Nf3 Ne4 $36 {[%mdl 2048] Black has good play.} 17. a3 g5 18. h3 h5 19. Be3 ({Of course not} 19. Nxg5 Nxf2 20. Be3 Nd3 $17) 19... g4 20. hxg4 hxg4 21. Ne5 Bxe5 22. dxe5 c5 23. b4 d4 24. Bh6 Rf5 $1 {[%cal Re4f2]} 25. bxc5 {Black must now prevent Rfe1.} Kh7 $1 {[%cal Rh7h6]} 26. Rfe1 (26. Rae1 $15 Rfxf2 27. Rxe2 Rxe2 28. Bf8) 26... Rfxf2 $17 27. Rxe2 Rxe2 {[%mdl 4096] Endgame KRB-KRN} 28. Bf4 Nxc5 29. Rd1 Ne6 30. Bg3 Re3 31. Bf2 Rxe5 32. Rb1 (32. Bg3 $17 {might work better.} Re3 33. Bf2) 32... Kg6 $19 33. Rb7 (33. Kf1 $142) 33... Ra5 34. Rb4 Rd5 ({Don't do} 34... Rxa3 35. Bxd4 Nxd4 36. Rxd4) 35. Kf1 Kf5 36. Ra4 Rd7 37. Ra6 Nf4 38. g3 $2 (38. Ra5+ {was the only chance.} Ke4 39. Ra4) 38... Nd3 39. Bg1 Ke4 40. Ke2 Ne5 41. Rf6 (41. Ra4 $142 a5 42. Bf2) 41... Rf7 42. Re6 Rf3 {Accuracy: White = 41%, Black = 75%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.15"]
[Round "8.1"]
[White "Stefansson, Hannes"]
[Black "Stany, G.A."]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2523"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,96,19,18,0,0,0,0,-6,34,29,34,30,25,12,10,21,68,60,72,68,62,62,66,65,67,72,107,87,104,97,97,90,81,72,81,76,77,72,68,61,71,58,60,48,55,43,57,45,78,79,147,141,168,174,194,190,322,343,326,262,657,532,510,487,564,510,543,558,563,548,1430,547,516,-78,-78,-78,-78,-86,-86,-86,-86]} 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. d4 Nb6 7. O-O Nc6 8. e3 O-O 9. Nc3 Re8 10. a3 {D76: Fianchetto Grünfeld: Main Line with 7...Nb6} e5 {[%cal Re5d4]} 11. d5 Na5 12. Qc2 {The position is equal.} e4 ({But not} 12... Nxd5 $2 13. Rd1 $16) 13. Nxe4 Qxd5 14. Nd4 {Black must now prevent Nf6+!} Qc4 {[#]} 15. Qxc4 $146 ({Predecessor:} 15. Qd1 Bf5 16. Nxf5 gxf5 17. Nd2 Qd3 {1-0 (56) Duda,J (2658)-Seel,C (2474) Berlin 2015}) 15... Nbxc4 16. Ra2 Ne5 17. b4 $36 {[%mdl 2048] White has some pressure.} Nac6 18. Rc2 Bg4 {White should prevent ...Nxd4.} 19. Nxc6 Nxc6 20. Nc5 Bf5 21. Rd2 Ne5 22. Bxb7 Rad8 23. Rxd8 Rxd8 24. Kg2 Nd3 25. Nxd3 Bxd3 26. Rg1 f5 27. Bf3 Bc2 28. Be2 Bc3 29. f3 a5 30. bxa5 Bxa5 31. Bc4+ Kf8 32. Rf1 c5 33. Rf2 Ba4 (33... Bd3 $142) 34. e4 $1 $16 Rd4 {[#]} 35. Bd5 $1 c4 36. Be3 Rxd5 (36... Rd3 {was worth a try.}) 37. exd5 $18 {[%mdl 4096] Endgame KRB-KB} c3 38. Re2 Bd1 $2 (38... Bd8 39. h4 Bf6 40. Bh6+ Kf7) 39. Bh6+ Kf7 40. Re6 Bb3 41. Ra6 Bd8 42. Ra7+ Ke8 43. d6 g5 44. Rxh7 (44. d7+ $142 Ke7 45. Bxg5+ Kd6 46. Bxd8) 44... Bf6 45. Bg7 $2 (45. Rc7 $18) 45... Bxg7 $17 {Black is better.} 46. Rxg7 {[#]} Bf7 $1 {...c2 is the strong threat.} 47. d7+ Kd8 48. Rxf7 c2 {Accuracy: White = 59%, Black = 48%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.15"]
[Round "8.2"]
[White "Sedlak, Nikola"]
[Black "Cernousek, Lukas"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2605"]
[BlackElo "2429"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,111,-16,-25,-34,-29,-25,-27,-21,-21,-27,-24,-43,-52,-41,-20,-16,0,0,0,-17,0,-45,-40,-45,-20,-15,-14,-13,-16,-17,-15,-15,-9,-14,-18,-16,-17,-27,-29,-18,-5,-55,-55,-60,-56,-52,-53,-58,-57,-58,-55,-89,-89,-89,-89,-89,-89,-89,-82,-82,-82,-82,-82,-82,-82,-82,-78,-78,-62,-82,-82,-82,-82,-82,-62,-62,-8,-8,-8,-62,-62,-62,-62,-62,-62,-62,-8,-8,-8,-62,-8,-8,-8,-8,-8,-8,0,0,0,0,0,-8,-8,-8]} 1. d4 d5 2. Nf3 Nf6 3. c3 c5 4. dxc5 e6 5. b4 a5 6. e3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} axb4 7. cxb4 b6 $1 8. Bb5+ {Black has an edge.} (8. a4 bxc5 9. b5 c4 10. Be2 Nbd7 11. O-O Bb4 12. Bd2 Qa5 {0-1 (33) So,W (2815)-Carlsen,M (2832) chess.com INT 2017}) 8... Bd7 9. Bxd7+ Nbxd7 10. a4 bxc5 11. b5 Bd6 (11... g5 $5) 12. O-O O-O 13. Nbd2 $146 ({Predecessor:} 13. Bb2) 13... Qb8 14. Bb2 Rc8 15. Bxf6 Nxf6 16. h3 e5 17. e4 $1 c4 {[%cal Bc5c4,Bc4c3][%mdl 32]} ({Reject} 17... Nxe4 18. Nxe4 dxe4 19. Ng5 $14) ({But not} 17... dxe4 18. Ng5 $14) 18. exd5 c3 19. Nb3 Rc4 20. Qc2 $1 Rcxa4 21. Rxa4 Rxa4 22. Qxc3 Nxd5 23. Qc2 Rb4 24. Rd1 Rxb5 25. Qc6 Rxb3 26. Qxd5 Rb1 27. Rxb1 Qxb1+ 28. Kh2 Qb4 {[#] ...e4+ is the strong threat.} 29. g3 {Hoping for Ng5.} Qc5 30. Qxc5 Bxc5 31. Nxe5 Bxf2 $15 {[%mdl 4096] Endgame KB-KN} 32. Kg2 Ba7 33. g4 f6 34. Nc6 Bc5 35. Nd8 Bb6 36. Nc6 Kf7 37. Nb4 Kg6 38. Nd5 Bc5 39. Nf4+ Kf7 40. Kf3 Bd6 41. Nd5 Kg6 42. Ne3 h5 (42... Bc5 $15 43. Ng2 Kf7) 43. Nf5 $11 Bc5 44. Nh4+ (44. h4 $11) 44... Kg5 $15 45. Nf5 hxg4+ 46. hxg4 g6 47. Ng3 {[#] Black must now prevent Ne4+.} Kh4 (47... Bd4 $15) 48. Ne4 $11 Bd4 49. Ng3 ({White should try} 49. Nd6 $1 $11) 49... Kh3 (49... Bb2 $15) 50. Ne4 $1 {The position is equal.} Be5 51. Nf2+ Kh2 52. Ne4 f5 53. gxf5 gxf5 54. Nf2 Bd6 55. Ng4+ fxg4+ 56. Kxg4 {Accuracy: White = 67%, Black = 58%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.15"]
[Round "8.3"]
[White "Stachowiak, Kamil"]
[Black "Zubov, Alexander"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2433"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,52,0,0,-11,-20,-14,-15,-16,-33,0,-32,-33,-32,-23,-28,-8,-10,-16,-33,-24,-31,-15,-15,-15,-24,-11,-27,-37,-43,0,-9,-25,-25,-17,-32,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7 6. Nbd2 Nbc6 {A07: Réti Opening: New York and Capablanca Systems} 7. c4 (7. e4 O-O 8. exd5 Nxd5 9. Re1 Re8 10. a3 Bf5 11. Ne4 b6 12. Bg5 f6 13. c4 Bxe4 14. Rxe4 Nde7 15. Bc1 Qd7 16. Re1 Rad8 17. Bf1 {0-1 (29) Mamedyarov,S (2801)-Giri,A (2782) chess.com INT 2018}) 7... a5 $146 ({Predecessor:} 7... d4 8. a3 a5 9. b3 h6 10. Rb1 O-O 11. b4 axb4 12. axb4 Be6 13. b5 Na5 14. Ba3 {1-0 (28) Djukic,N (2574)-Nestorovic,N (2460) Skopje 2018}) 8. cxd5 Nxd5 9. Nc4 h6 10. Bd2 O-O 11. Rc1 Re8 12. a3 Ra6 13. Re1 Be6 14. Qa4 Qb8 {[#] Strongly threatening ...b5.} 15. Qc2 ({Not} 15. Bxa5 $2 Nb6 $19) ({Don't blunder} 15. Nxa5 $2 Nxa5 16. Bxa5 b5 $19) 15... a4 16. e4 Nb6 17. Nxb6 cxb6 18. Be3 Rd8 19. h3 Qc8 20. Kh2 Qd7 21. Bf1 b5 22. Qc5 Bf8 23. Qxb5 {The position is equal.} Ra5 24. Qb6 {[#] Threatens to win with Rxc6!} Ra6 25. Qb5 Ra5 26. Qb6 Ra6 {Accuracy: White = 39%, Black = 56%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.15"]
[Round "8.4"]
[White "Bernadskiy, Vitaliy"]
[Black "Bakhmatsky, Vladislav"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "2581"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,-10,39,9,36,25,41,23,39,45,40,31,42,58,45,39,67,38,49,44,86,13,18,10,30,-46,-28,-37,-52,-30,-44,-81,-70,-70,-68,-70,-70,-102,-82,-77,-74,-76,-74,-108,-106,-99,-109,-106,-100,-100,-102,-89,-89,-94,-2,-10,0,0,0,-49,-42,-429,-410,-533,-525,-818,-798,-787,-779,-784,-784,-763,-762]} 1. d4 Nf6 2. Bg5 d5 3. Nd2 c5 4. dxc5 e6 5. e4 Nc6 $146 ({Predecessor:} 5... Bxc5 6. Qe2 dxe4 7. O-O-O Qa5 8. Nb3 Qc7 9. Bxf6 gxf6 10. Qb5+ Nd7 11. Rxd7 Bxd7 12. Qxc5 Qxc5 13. Nxc5 {½-½ (30) Andreikin,D (2719)-Karjakin,S (2753) St Petersburg 2018}) 6. Nb3 {D00: 1 d4 d5: Unusual lines} dxe4 7. Qxd8+ Nxd8 8. Ne2 {White is slightly better.} Nd5 9. O-O-O f6 10. Bd2 Bd7 11. Ng3 f5 12. Bc4 Bc6 13. Rhe1 Be7 14. Kb1 Rf8 15. f3 ({Better is} 15. Ne2 $16) 15... e3 $11 16. Bc1 ({Reject} 16. Bxe3 Nxe3 17. Rxe3 f4 $17) 16... Rc8 17. Nh5 ({And not} 17. Bxe3 Nxe3 18. Rxe3 f4 $17) (17. Nd4 $11) 17... g6 $15 18. Ng7+ Kf7 19. Nxe6 $1 {[%mdl 64] [#] Remove Defender} Nxe6 20. Bxd5 Bxd5 21. Rxd5 f4 $1 $36 {[%mdl 2048] Black has some pressure.} 22. Rd7 Rc7 23. Rd5 Nxc5 24. Nd4 Rd7 25. Rxd7 Nxd7 26. g3 {[#]} g5 $1 27. Ne2 Bd6 28. Rd1 Ke6 29. b3 Be5 30. Ba3 Rf7 {...g4! is the strong threat.} 31. gxf4 Bxf4 (31... gxf4 $17 32. Bb2 b6) 32. h4 $1 $11 Be5 33. hxg5 Rxf3 34. Bc1 Nc5 {White must now prevent ...Ne4.} ({Much weaker is} 34... Rf2 35. Re1 $11) 35. Rd8 $2 {[%mdl 8192]} ({White should play} 35. c4 $1 $15) 35... Ne4 $19 36. Re8+ Kf5 {Hoping for ...Nd2+.Black is clearly winning.} 37. Rf8+ Kg4 {( -> ...Nd2+)} 38. Rd8 Nc3+ 39. Nxc3 Bxc3 40. Re8 Bd2 {Accuracy: White = 49%, Black = 63%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.15"]
[Round "8.5"]
[White "Kriebel, Tadeas"]
[Black "Vorobiov, Evgeny E."]
[Result "1/2-1/2"]
[ECO "B43"]
[WhiteElo "2507"]
[BlackElo "2566"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,54,8,0,0,0,0,-12,-8,0,0,-17,0,0,0,-12,-12,-12,-7,-18,0,-29,-16,-20,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Bb7 7. O-O Nc6 8. Nxc6 Bxc6 9. Qe2 {B43: Sicilian: Kan Variation: 5 Nc3} (9. Re1 Nf6 10. e5 b4 11. exf6 bxc3 12. fxg7 Bxg7 13. b3 Qh4 14. g3 Qd4 15. Qh5 Qd5 16. Qxd5 Bxd5 {1-0 (44) Guseinov,G (2667)-Romanov,E (2614) Hoogeveen 2018}) 9... Bc5 10. a4 b4 11. Nd5 Ne7 12. Be3 Bxe3 13. Nxe3 {LiveBook: 4 Games} O-O 14. f4 Qb6 $146 ({Predecessor:} 14... f5 15. exf5 Nxf5 16. Nxf5 exf5 {½-½ (25) Fercec,N (2491)-Paljusaj,E (2316) Rijeka 2010}) 15. Kh1 Qd4 16. Nc4 d5 17. Na5 Bd7 18. exd5 Nxd5 19. Qe4 Qxe4 20. Bxe4 Rac8 21. Rfd1 Rc7 22. Bxd5 exd5 23. Rxd5 {The position is equal.} Rfc8 24. Rad1 Bxa4 25. b3 Be8 26. Nc4 Kf8 27. Kg1 f6 {Precision: White = 63%, Black = 59%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.15"]
[Round "8.6"]
[White "Nguyen, Piotr"]
[Black "Gasanov, Eldar"]
[Result "0-1"]
[ECO "A03"]
[WhiteElo "2419"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,108,-11,-11,-10,0,0,-9,-37,14,-16,-20,-13,0,0,0,0,0,0,0,0,0,0,0,0,0,-3,24,0,14,0,7,8,9,16,10,16,23,14,14,11,214,216,202,182,175,145,375,353,378,364,334,304,272,150,160,4,4,25,12,8,136,31,26,-185,190,-185,-185,-251,-245,-207,-249,-242,-194,-194,-186,-178,-159,-291,-286,-278,-276,-371,-362,-362,-362,-518,-518,-29975,-29976,-29976,-29977,-29976,-29978,-29978,-29979,-29979,-29980,-29981,-29982,-29982,-29983]} 1. f4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O b5 6. d3 {A03: Bird's Opening with 1...d5} Bb7 7. e4 $146 ({Predecessor:} 7. Qe1 c5 8. c3 O-O 9. a4 b4 10. cxb4 cxb4 11. Kh1 Nc6 12. Be3 Nd7 {1-0 (44) Carlsen,M (2832)-Kramnik,V (2808) Leuven 2017}) 7... dxe4 8. Nfd2 {The position is equal.} c5 ({Better is} 8... h5 $15) 9. Nc3 {[%cal Rd2e4]} Qb6 {Black wants to play ...exd3.} 10. Ndxe4 c4+ 11. Kh1 Nxe4 12. Nxe4 O-O 13. dxc4 bxc4 14. Qe2 Nd7 15. Be3 Qc7 16. Bd4 Rad8 17. Rae1 g6 18. c3 Rfe8 19. g4 Bh4 20. Rd1 e5 21. fxe5 Nxe5 22. g5 {Strongly threatening Nf6+.} Bxe4 $1 23. Qxe4 Bxg5 24. Rde1 $1 {[%cal Rd4e5]} f6 $2 (24... Qc8 $1 $11) 25. h4 $1 $18 {[%cal Rh4g5]} Bh6 26. Rxf6 Bg7 27. Ra6 (27. Bxe5 Rxe5 28. Qxe5 Qxe5 $11) 27... Re7 $2 (27... Qb8 $16 28. Qb7 (28. Rxa7 Nf7 $11) 28... Nf7 29. Rxe8+ Rxe8 30. Qxb8 (30. Rxa7 Re1+ 31. Bg1 Qf4 $17) 30... Rxb8) 28. Rxa7 Qxa7 29. Bxa7 Rxa7 30. Qf4 Rf7 31. Qg3 (31. Qe3 $18) 31... Rd3 $16 32. Qg5 $2 ({White should play} 32. Qh2 $1 $16) 32... h6 $132 {[%mdl 2048] Black is fighting back} 33. Qc1 {Hoping for Be4.} Rf2 34. Rf1 Ng4 (34... Re2 $11 {keeps the balance.}) 35. a4 (35. Qe1 $1 $16 {[%cal Re1e6]} Re3 36. Qd1) 35... Rdd2 $14 36. Be4 $2 (36. Bf3 $11 {and White stays safe.} Rh2+ 37. Kg1) 36... Rxf1+ $1 $19 37. Qxf1 Rd1 $1 {[%cal Rd1f1][%mdl 64] Deflection, Decoy} 38. Qxd1 (38. Bd5+ $142 Kh7 39. Bxc4 (39. Bg8+ Kxg8 40. Qg1 Nf2+ 41. Kh2 Rxg1 $19)) 38... Nf2+ {[%mdl 64] Double Attack} 39. Kg2 {White wants to mate with Qd5+.} Nxd1 40. a5 {a6 is the strong threat.} Bf8 ({Not} 40... Nxb2 41. a6 $11) 41. Bxg6 Nxb2 42. Kf3 Kg7 43. Be8 (43. Bf5 $17) 43... Kf6 44. Ke4 {[#]} Ke6 $1 45. Kd4 {Threatening a6.} Bg7+ 46. Kc5 {Threatens to win with a6.} Bxc3 47. Bb5 (47. a6 $142 Ke5 48. Bg6) 47... Ke5 48. Bxc4 (48. h5 $19) 48... Bd4+ {Black mates.} 49. Kb4 Nxc4 50. Kxc4 {[#]} h5 $1 51. Kd3 Ba7 52. Ke2 Kf4 53. Kf1 Kg3 54. a6 Bb6 {Accuracy: White = 44%, Black = 70%.} 0-1

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.16"]
[Round "9.1"]
[White "Vorobiov, Evgeny E."]
[Black "Stefansson, Hannes"]
[Result "1/2-1/2"]
[ECO "C48"]
[WhiteElo "2566"]
[BlackElo "2523"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,79,13,19,11,8,9,21,17,14,10,10,12,8,0,-10,0,12,9,11,-6,6,0,10,4,0,0,18,14,21,8,24,10,29,29,25,3,3,0,18,17,26,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-55,0,-3,0,-8,-16,-181,0,0,0,-189,0,-43,-9,-8,-15,-33]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Bc4 d6 6. Nxd4 {C48: Four Knights: 4 Bb5, replies other than 4...Bb4} exd4 7. Nd5 Nd7 8. O-O g6 9. c3 Bg7 10. cxd4 Bxd4 11. d3 c6 12. Nc3 O-O 13. Bh6 Re8 {[#]} 14. Ne2 $146 (14. Be3 {keeps more tension.} Bg7 15. d4 b5 16. Bd3 a6 17. Qd2) ({Predecessor:} 14. Qd2 b5 15. Bb3 Nc5 16. Be3 Bxe3 17. Qxe3 b4 18. Ne2 Qb6 19. Bc2 {½-½ (19) Rublevsky,S (2697)-Inarkiev,E (2649) Moscow 2010}) 14... Bg7 (14... Bf6 {with more complications.} 15. Be3 Nc5 16. Nd4 d5 17. exd5 cxd5 18. Bb5 Bd7) 15. Bxg7 Kxg7 16. Qd2 Nf6 17. Rfe1 Be6 18. Bxe6 fxe6 19. Ng3 e5 20. d4 Qe7 21. Rad1 Rad8 22. h3 c5 23. d5 Rf8 24. b4 Rc8 25. a4 cxb4 26. Qxb4 Rc5 27. Rc1 Rfc8 28. Rxc5 Rxc5 29. a5 a6 30. Rb1 Rb5 31. Qe1 Qc7 32. Rc1 ({Better is} 32. Ra1 $11) 32... Qd8 ({Black should try} 32... Qxa5 $15 33. Qxa5 Rxa5) 33. Ra1 Nd7 34. Ra3 Nc5 35. Rf3 $2 {[#]} (35. Nf1 $11) 35... Nb3 $2 (35... Rxa5 $19 {Hoping for ...Ra4.} 36. Nf1 Ra4) 36. Rc3 $11 Nc5 ({Wrong is} 36... Qxa5 $2 37. Qe3 $18) 37. Qd2 $2 (37. Rf3 $11 {and White is okay.}) 37... Rb3 $2 ({But not} 37... Qxa5 $2 {[#]} 38. Nh5+ $1 {[%mdl 512]} Kf8 39. Rf3+ Ke8 40. Qh6 $18) (37... Rxa5 $19 38. Qe2 Qf6) 38. Qc2 Rxc3 39. Qxc3 b5 40. axb6 $1 {Accuracy: White = 52%, Black = 66%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.16"]
[Round "9.2"]
[White "Stany, G.A."]
[Black "Bakhmatsky, Vladislav"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2507"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,73,8,20,20,19,19,26,13,31,19,39,10,17,13,20,-15,56,37,46,-15,32,0,19,-69,-53,-106,-110,-155,-141,-124,-117,-241,-236,-233,-217,-187,-232,-208,-233,-179,-44,-208,-252,-270,-22,-24,-24,-21,-12,-31,-25,-24,-38,-50,-62,-64,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 h5 9. Qd2 Nbd7 10. Nd5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} Bxd5 11. exd5 g6 12. Be2 {White has an edge.} (12. O-O-O Bg7 13. Kb1 Qc7 14. Be2 a5 15. a4 O-O 16. g4 Rfc8 17. Bb5 hxg4 18. fxg4 Nxg4 {0-1 (75) Robson,R (2667)-Saric,I (2690) chess.com INT 2019}) 12... Bg7 13. O-O b6 14. c4 O-O 15. h3 Re8 {[#]} 16. g4 $146 ({Predecessor:} 16. Rad1 Nc5 17. Nxc5 bxc5 {½-½ (30) Edwards,J (2518)-Finocchiaro,F (2589) ICCF email 2016}) 16... Qc8 (16... hxg4 $11 17. hxg4 a5) 17. Kh2 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 18. Rad1 (18. g5 $14 Nh7 19. Qc2) 18... Nc5 19. Rg1 a4 20. Na1 (20. Nxc5 $11 bxc5 21. g5) 20... hxg4 21. hxg4 (21. fxg4 $15 e4 22. Nc2) 21... e4 $17 22. f4 Nd3 $1 23. g5 Nd7 $1 24. Bxd3 (24. Bg4 $17 {was necessary.}) 24... exd3 $19 25. Qxd3 Nc5 26. Qd2 Ne4 27. Qd3 Bxb2 28. Rg2 {[#]} Bg7 ({Better is} 28... a3 $1 $19 {Hoping for ...Nc3.} 29. Nb3 Ra4) 29. Bxb6 $2 {[#]} (29. Nc2 $15) 29... Rb8 $1 {[%cal Rb8b6]} 30. Be3 Nc5 $2 (30... Rb4 $19 31. Rc1 Nc5 32. Bxc5 Qxc5) 31. Bxc5 $1 $11 Qxc5 32. Nc2 Rbc8 33. Kg3 $1 Qxc4 34. Qxc4 Rxc4 35. Rd3 Ree4 36. Rf2 Rc5 (36... f5 $15) 37. Kf3 {Accuracy: White = 29%, Black = 45%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.16"]
[Round "9.3"]
[White "Kashlinskaya, Alina"]
[Black "Sedlak, Nikola"]
[Result "1/2-1/2"]
[ECO "E00"]
[WhiteElo "2470"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "142"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,142,14,26,23,22,24,34,0,15,14,29,39,38,40,41,35,89,62,96,20,37,19,27,39,44,0,2,-110,-110,-106,-112,-144,-81,-52,-32,-37,-38,-30,-25,-26,-36,-68,-15,-18,-4,-6,-8,-7,145,172,175,91,91,79,91,31,112,-14,-14,-21,0,0,0,0,0,-38,-33,-49,-52,-31,-31,-31,-34,-34,-30,-48,-49,-46,-46,-50,-52,-56,-46,-46,-26,-26,-26,-26,-26,-35,-35,-35,-35,-35,-35,-63,-44,-75,-87,-1335,-1309,-1295,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0,-8,-8,-8,-8,-8,0,0,0,0,0,0,0,-8,-8,-8,-8,-8,-8]} 1. d4 e6 2. c4 Bb4+ 3. Bd2 a5 4. e4 d5 5. a3 (5. cxd5 exd5 6. e5 c5 7. Bxb4 axb4 8. dxc5 Nc6 9. Nf3 Nge7 10. Nbd2 Ng6 11. Bb5 O-O 12. Bxc6 bxc6 {0-1 (35) Leniart,A (2489)-Bernadskiy,V (2586) Suwalki 2018}) 5... Bxd2+ 6. Nxd2 {A40: Unusual replies to 1 d4} Ne7 7. Ngf3 O-O 8. Bd3 $146 {White is slightly better.} ({Predecessor:} 8. Be2 c5 9. dxc5 Nd7 10. cxd5 exd5 11. Rc1 Ng6 12. O-O Nf4 {0-1 (54) Albrecht,O (2157)-Goossens,E (2181) Germany 2011}) 8... dxe4 9. Nxe4 Nbc6 (9... e5 $5) 10. Ng3 Nf5 11. d5 Nce7 12. Qc2 Qd7 (12... g6 $14) 13. O-O-O exd5 14. Bxf5 (14. Rhe1 $1 $16) 14... Nxf5 $11 15. Rxd5 {[%mdl 64] Double Attack} Nd6 {[%cal Bf5d6,Bd6e8,Be8f6,Bf6d7][%mdl 32]} 16. c5 Qc6 17. Rh5 {[%csl Gh5][%cal Rc2h7]} g6 18. Nd4 (18. Re5 $11 {remains equal.} Nf5 19. Rhe1) 18... Qxg2 $17 19. Rg5 Ne8 $1 20. Re1 h6 (20... Ng7 $142 $1 21. Ne4 Qxh2) 21. Rge5 Bh3 22. Qd2 Nf6 23. Qf4 Nd7 24. R5e3 Qd5 25. Ne4 Qxd4 (25... Bg2 $1 $15 26. Nc3 Qc4) 26. Rxh3 $11 {Hoping for Rd1.} Rfe8 27. Qxh6 Qg7 28. Qd2 Rad8 $2 (28... Nf6 $11 29. Ng5 Rxe1+ 30. Qxe1 Nd7) 29. Rd3 $1 $16 {[%cal Rd3d7]} ({Of course not} 29. Qxa5 $6 Qd4 $11) 29... Re7 30. Nc3 ({Reject} 30. Qxa5 $6 Rde8 $11) (30. f3 $1 $18) 30... Rxe1+ 31. Qxe1 Qh6+ {[#]} 32. Kb1 (32. Kc2 $1 $16 Qf8 33. Qd2) 32... Qg5 ({Better is} 32... Qf8 $14) 33. Ne4 ({White should try} 33. Rd5 $16 Qf6 34. Qd2) 33... Qe7 $11 34. Qe3 f5 35. Nc3 Qxe3 36. fxe3 {[%mdl 4096] Endgame KRN-KRN} Kf7 37. Nb5 Ke7 38. Nxc7 Nxc5 39. Rxd8 Kxd8 $15 {KN-KN} 40. Nd5 g5 41. Kc2 Kd7 42. Nc3 Ke6 43. b4 axb4 44. axb4 Nd7 45. Kd3 Ne5+ 46. Ke2 Nc6 47. b5 Ne5 48. h3 Kd6 49. Kf2 Kc5 50. Ne2 Kxb5 51. Nd4+ Ka4 52. Nxf5 b5 {[%cal Bb7b5,Bb5b4,Bb4b3][%mdl 32] ...b4 is the strong threat.} 53. Nd4 b4 {aiming for ...b3.} 54. Ke2 $2 {[%mdl 8192]} (54. e4 $17) 54... b3 $19 55. Kd2 {[#]} Ka3 $2 (55... Nc4+ $1 $19 56. Kc1 Ka3 57. Nb5+ Ka2 58. Nc3+ Ka1) 56. Kc3 $11 {The position is equal.} b2 57. Nc2+ $1 Ka2 58. Nb4+ Ka1 59. Nc2+ Kb1 60. Nb4 Kc1 61. Na2+ Kb1 62. Nb4 Kc1 63. Na2+ Kd1 ({Resist} 63... Kb1 64. Nb4 $17) 64. Kxb2 Kd2 65. e4 Nd3+ 66. Kb3 Nc5+ 67. Kc4 Nxe4 68. Kd4 Nf2 69. Nc3 Nxh3 {Strongly threatening ...g4.} 70. Ne4+ Ke2 {White must now prevent ...g4.} 71. Nxg5 Nxg5 {Accuracy: White = 52%, Black = 56%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.16"]
[Round "9.4"]
[White "Zubov, Alexander"]
[Black "Rasik, Vitezslav"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2605"]
[BlackElo "2463"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,77,38,44,51,9,10,20,23,18,15,29,20,30,29,22,40,36,41,0,16,6,33,33,14,20,39,15,44,54,45,39,43,29,31,29,29,35,27,25,25,17,44,37,72,59,59,59,59,59,59,59,59,59,58,54,82,74,137,133,105,0,0,0,114,126,551,550,520,513]} 1. d4 d6 2. e4 g6 3. Nf3 Nf6 4. Bd3 Bg7 5. O-O O-O 6. Re1 Nc6 {B07: Pirc Defence: Miscellaneous Systems} 7. d5 Nb4 8. Bf1 Bg4 {The position is equal.} 9. Nbd2 a5 10. h3 Bd7 11. c3 Na6 12. Nc4 e6 13. dxe6 $1 Bxe6 {[#]} 14. Bg5 $146 ({Predecessor:} 14. e5 dxe5 15. Ncxe5 Qxd1 16. Rxd1 {½-½ (25) Aronian,L (2528)-Ponomariov,R (2673) Ohrid 2001}) 14... Nc5 15. Ncd2 h6 16. Bh4 Re8 17. Nd4 Bd7 18. f3 g5 19. Bf2 d5 {[%cal Rd5e4]} 20. exd5 Rxe1 21. Qxe1 Nxd5 22. Ne4 Nxe4 23. Qxe4 c6 24. Nf5 Bxf5 25. Qxf5 Qf6 26. Qd7 b5 27. Re1 Rd8 28. Re8+ Rxe8 29. Qxe8+ Bf8 30. c4 bxc4 31. Bc5 Ne7 $1 32. Bxc4 Qf4 33. b3 $36 {[%mdl 2048] White is on the roll.} Qc1+ (33... Qf6 $142) 34. Kh2 $16 Qf4+ {[#]} 35. Kg1 (35. Kh1 $1 $16 Ng6 36. Bd4) 35... Qc1+ $1 $11 36. Kh2 (36. Kf2 $11 Qf4 37. Qd8) 36... Qf4+ $16 {[#]} 37. Kh1 $1 Kg7 $2 {[%mdl 8192] [#]} (37... Qf6 $16 38. a4 Ng6) 38. Bd6 $1 $18 {[%cal Rd6f4][%mdl 512]} Qf5 (38... Qxd6 39. Qxf7+) 39. Bxe7 {Accuracy: White = 81%, Black = 57%.} 1-0

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.16"]
[Round "9.5"]
[White "Cernousek, Lukas"]
[Black "Demuth, Adrien"]
[Result "1/2-1/2"]
[ECO "A58"]
[WhiteElo "2429"]
[BlackElo "2510"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,75,27,60,75,56,45,48,37,46,34,52,34,53,42,36,40,45,31,40,23,43,17,12,0,24,0,10,12,23,16,13,13,27,33,24,25,22,9,30,11,24,11,51,51,58,53,61,57,54,41,106,98,225,237,1173,241,233,87,102,8,6,12,8,0,0,0,12,0]} 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 {A58: Benko/Volga Gambit: Lines with 5 bxa6} Bg7 7. a7 (7. e4 O-O 8. e5 Ne8 9. h4 Bxe5 10. Bh6 Bxa6 11. h5 Ng7 12. Nf3 Bxc3+ 13. bxc3 Bxf1 14. Kxf1 {1-0 (22) So,W (2780)-Duda,J (2737) chess.com INT 2018}) 7... Rxa7 8. e4 {[%cal Be2e4,Be4d5][%mdl 32] White is slightly better.} O-O 9. Nf3 e6 10. Be2 exd5 11. exd5 d6 12. O-O Na6 {[%cal Bb8a6,Ba6c7,Bc7b5,Bb5c3][%mdl 32]} 13. Bb5 Nc7 14. Bc6 $146 Bb7 15. Bxb7 Rxb7 16. Qd3 Qd7 17. Rb1 Ra8 18. h3 Nb5 19. Bf4 Nxc3 20. bxc3 Rxa2 21. Rxb7 Qxb7 22. Rb1 Qc7 23. Qb5 {[#] Hoping for Qc6.} Ra8 24. c4 Ne4 {And now ...Nc3 would win.} 25. Qc6 $36 {[%mdl 2048] White has good play.} Qd8 26. Ng5 $1 {[%cal Rg5e4]} Nxg5 27. Bxg5 f6 28. Bf4 Bf8 29. Rb7 {aiming for Rd7.} Qc8 (29... g5 $14 30. Bd2 Rb8) 30. Rd7 $16 Qb8 31. Kh2 (31. Bxd6 $6 Bxd6 32. Rxd6 (32. Qxd6 Qxd6 33. Rxd6 Ra4 $16) 32... Ra1+ 33. Kh2 Kg7 $16) 31... Ra1 $2 (31... Kh8 32. Rf7 (32. Bxd6 Bxd6+ 33. Rxd6 Ra2 $16) 32... Qe8) 32. Rb7 $2 ({Weaker is} 32. Bxd6 Bxd6+ 33. Rxd6 (33. Qxd6 Qxd6+ 34. Rxd6 Rc1 $16) 33... Kg7 $16) (32. Rc7) 32... Qd8 $18 {[#]} 33. Qb5 (33. Rc7 $1 $18 {[%cal Rc7c8] is more deadly. Strongly threatening Rc8.} Ra8 34. Rd7) 33... Ra8 $16 34. Rd7 (34. Qb2 $16) 34... Qe8 $11 {The position is equal.} 35. Qb7 Rb8 36. Qc7 Rc8 37. Qb7 Rb8 38. Qc7 {Accuracy: White = 52%, Black = 59%.} 1/2-1/2

[Event "Prague Festival Open 2019"]
[Site "Prague"]
[Date "2019.03.16"]
[Round "9.6"]
[White "Rakesh Kumar Jena"]
[Black "Kriebel, Tadeas"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "2416"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2019.02.28"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,120,0,0,0,-6,-14,0,0,0,0,10,10,8,6,18,16,33,0,21,-10,-18,-23,-23,-26,-24,-22,35,43,53,54,56,53,76,72,91,85,99,88,91,91,99,92,100,75,135,145,140,110,110,47,100,46,100,41,95,0,68,40,53,-85,-91,-42,-46,-132,-151,-113,-26,-53,-19,-475,-493,-498,-498,-485,-494,-492,-492,-484,-470,-464,-262,-450,-445,-677,-677,-666,-673,-669,-665,-635,-635,-634,-634,-656,-653,-809,-813,-808,-750,-745,-716,-5122,-976,-4116,-1925]} 1. d4 Nf6 2. Bf4 b6 3. e3 Bb7 4. Nd2 g6 5. Ngf3 Bg7 6. Be2 O-O 7. h3 d6 8. O-O Nbd7 9. c3 Re8 10. Bh2 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} e5 11. a4 a6 12. Qb3 {The position is equal.} (12. dxe5 Nxe5 13. Nxe5 dxe5 14. Nc4 Ne4 15. Qxd8 Raxd8 16. Rfd1 Rxd1+ 17. Rxd1 {½-½ (63) Wang,Y (2690)-Al Modiahki,M (2542) Riadh 2017}) 12... Qe7 13. Rfd1 e4 14. Ne1 $1 a5 15. Rac1 $146 ({Predecessor:} 15. Nc2 h5 16. Na3 Nf8 {0-1 (38) Khandhar,K (1981)-Dimakiling,O (2425) Johor 2017}) 15... h5 {[%cal Bh7h5,Bh5h4][%mdl 32]} 16. c4 g5 17. Nf1 {[%cal Bd2f1,Bf1g3,Bg3f5,Bf5d6][%mdl 32]} Qe6 18. Qb5 Bh6 19. Ng3 $1 h4 20. Nf5 Bf8 {With the idea ...Ba6.} 21. Nxd6 $1 cxd6 (21... Bxd6 $11 22. Qxg5+ Kf8) 22. Qxg5+ $14 Bg7 23. Qxh4 Nf8 24. g4 {[%mdl 1024] White has compensation.} N6h7 25. Qg3 Rad8 26. h4 Bc8 27. Ng2 Ng6 28. Kh1 Kh8 29. Rg1 Rg8 30. g5 Ne7 (30... Bf8 $142) 31. Nf4 $16 Qd7 32. Bh5 Nf8 33. Qg2 (33. Bd1 $16) 33... Qf5 (33... Nfg6 $14) 34. Ne2 (34. Bg4 $16 Qh7 35. Qh3) 34... Nfg6 (34... Qh7 $14 35. Bxf7 Nfg6) 35. Ng3 (35. Bg4 $16 Qxg4 36. Qxg4 Bxg4 37. Rxg4) 35... Qe6 {[#]} (35... Qd7 $14) 36. Qxe4 (36. d5 $1 $16 {[%cal Rd5e6]} Qd7 37. Nxe4) 36... d5 (36... Qh3 $11) 37. Qxe6 Bxe6 38. Bxg6 (38. c5 $14 {keeps the upper hand.}) 38... Nxg6 $17 ({Reject} 38... fxg6 $6 39. c5 $11) 39. h5 Nh4 $1 40. f4 (40. h6 $15 Bf8 41. Nh5) 40... dxc4 {Strongly threatening ...Bxd4!} 41. Rgf1 Rxd4 (41... Bh3 $17 42. h6 {[#]} Bxh6 $1 {[%mdl 512]} 43. gxh6 Bxf1 44. Rxf1 Rge8) 42. h6 $11 {[#]} Bf6 $1 {[%mdl 512]} 43. gxf6 $2 {[%mdl 8192]} (43. exd4 $11 {and White has nothing to worry.} Bd5+ 44. Kg1 Bxd4+ {[%mdl 64] Double Attack} 45. Rf2 Nf3+ 46. Kf1 Bxf2 47. Kxf2 Nxh2 48. Nf5) 43... Bd5+ $19 44. e4 Rxe4 $1 45. Rcd1 {[#]} Ba8 $1 {[%mdl 512]} 46. Kg1 Re2 {( -> ...Rg2+)} 47. Rf2 Nf3+ 48. Kf1 Rxf2+ 49. Kxf2 Nxh2 {Black is clearly winning.} 50. Nf5 (50. Rd7 $142) 50... Ng4+ 51. Ke2 Re8+ 52. Kd2 Rd8+ 53. Kc1 Rxd1+ 54. Kxd1 Nxf6 55. Nd6 Bd5 56. Kc2 Ne4 57. Nc8 Be6 58. Nxb6 f5 59. Kd1 Kh7 (59... Nf6 $142 60. Kd2 Kh7) 60. Ke2 Nf6 {Accuracy: White = 45%, Black = 48%.} 0-1

