[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.12"]
[Round "1.1"]
[White "Grandelius, Nils"]
[Black "Harikrishna, Pentala"]
[Result "1/2-1/2"]
[ECO "B47"]
[WhiteElo "2659"]
[BlackElo "2713"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,72,46,37,58,23,27,24,18,29,27,23,37,16,14,15,21,20,46,45,36,43,40,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-7,0,-8,-4,-4,0,-5,-5,-5,-5,-5,-5]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 Nf6 8. O-O Nxd4 9. Qxd4 Bc5 10. Bf4 d6 11. Qd2 h6 12. Rad1 e5 13. Be3 Bb4 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2.} 14. a3 (14. Nb5 $5 axb5 15. Qxb4 $14) 14... Bxc3 $1 15. Qxc3 Qxc3 {White has an edge.} 16. bxc3 Be6 17. Rxd6 Rc8 {[#]} 18. Bb6 $146 (18. Bd2 {seems wilder.} Ke7 19. Rb6 Rhd8 20. Rxb7+ Kf8 21. Be3) ({Predecessor:} 18. Rb1 Rxc3 19. Rxb7 O-O 20. Ra7 Ng4 21. Bd2 Rxa3 22. Bf1 Rc8 23. Bd3 Ra1+ 24. Kg2 {1-0 (60) Rocco,F (2157)-Wadsworth,M (2418) Torquay 2019}) 18... O-O 19. Ba5 Rc4 $1 20. Rb6 Nxe4 21. Re1 Nxc3 22. Bxb7 Na4 23. Rxa6 Nc5 {The position is equal.} 24. Ra7 Nxb7 25. Rxb7 Rxc2 26. Rxe5 Ra2 27. Kg2 Re8 {[#] aiming for ...Bh3+!} 28. Bc7 Rxa3 29. Rb8 Rxb8 30. Bxb8 $11 {[%mdl 4096] Endgame KRB-KRB} g5 31. h3 Rd3 32. Re1 h5 33. Ba7 Kg7 34. Kh2 Kg6 35. Be3 g4 36. h4 Bd5 {Accuracy: White = 90%, Black = 95%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.12"]
[Round "1.2"]
[White "Firouzja, Alireza"]
[Black "Ragger, Markus"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2726"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,88,6,0,14,18,24,18,17,19,18,14,25,16,17,7,25,0,4,10,10,12,22,8,8,0,0,0,0,0,0,0,0,0,0,0,23,23,23,23,23,23,15,16,17,22,22,22,22,22,35,0,8,0,22,0,35,0,22,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. a3 O-O 9. Nc3 Na5 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} 10. Ba2 Be6 11. b4 Bxa2 12. Rxa2 Nc6 13. Bg5 Ng4 {The modern move.} 14. Bd2 Nf6 15. Re1 Qd7 16. Nd5 Nxd5 17. exd5 Na7 18. a4 c6 19. axb5 axb5 20. Qa1 {Black must now prevent dxc6.} cxd5 21. Be3 {And now c3 would win.} d4 {[#]} 22. Nxd4 $1 {[%mdl 512]} exd4 23. Bxd4 {[%mdl 64] [#] Double Attack} Bf6 $1 24. Bxf6 gxf6 {[#]} 25. h3 $146 {Strongly threatening Re3.} (25. Qxf6 {with more complications.} Nc6 26. Qg5+ Kh8 27. Qf6+ Kg8) ({Predecessor:} 25. Re3 Rfe8 26. Rg3+ Kf8 27. h3 Re6 28. c4 bxc4 29. dxc4 Qc7 30. Kh2 Qxc4 31. Rxa7 Rxa7 32. Qxa7 Qxb4 {½-½ (37) Anand,V (2774)-Svidler,P (2735) Karlsruhe/Baden Baden 2019}) 25... Rfe8 26. Rxe8+ Qxe8 27. Rxa7 Rxa7 28. Qxa7 $11 {[%mdl 4096] Endgame KQ-KQ} Qe1+ 29. Kh2 {Qb8+ is the strong threat.} Qxb4 30. Qe3 Kg7 31. d4 d5 32. Qg3+ Kf8 33. Qb8+ Kg7 34. Qg3+ Kf8 35. Qd3 Kg7 36. Kg3 Qd6+ {The position is equal.} 37. Kg4 Qe6+ 38. Kh5 f5 {[%csl Gg7][%cal Re6h6]} 39. Qg3+ Kh8 40. Qg5 Qe2+ 41. g4 fxg4 42. Qf6+ Kg8 43. Qg5+ Kh8 44. Qf6+ Kg8 {Accuracy: White = 93%, Black = 96%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.12"]
[Round "1.3"]
[White "Vitiugov, Nikita"]
[Black "Anton Guijarro, David"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "2731"]
[BlackElo "2697"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,87,10,26,4,22,0,0,0,0,0,45,0,0,0,0,-44,0,-47,-40,-72,-56,-54,-47,-44,-9,-7,-19,-25,0,0,0,0,0,0,0,0,37,0,26,33,26,35,55,37,34,3,47,0,0,0,0,0,52,0,118,119,320,315,672,687,797,794,654,663,1692,1635,1640,921,786,529]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Re1 O-O 7. d4 a6 8. Bxc6 dxc6 9. h3 cxd4 10. cxd4 c5 11. d5 {B31: Sicilian: 2...Nc6 3 Bb5 g6.} b5 12. Qc2 $5 {[%mdl 4] Exploring less charted territory.} c4 {[#]} 13. a4 $146 {The position is equal.} ({Predecessor:} 13. Nc3 Nd7 14. Be3 Qc7 15. Rad1 Bb7 16. Nd4 Rac8 17. Nce2 Nc5 18. Nc1 Qe5 19. Nc6 Bxc6 20. Bxc5 {½-½ (31) Nagy,H (2098)-Diamant,T (2128) Hungary 2002}) 13... Bb7 14. Bd2 Qd7 15. axb5 axb5 16. Rxa8 Rxa8 17. Bb4 Nh5 18. Qd2 e5 19. Rd1 Nf4 20. Ne1 f5 21. f3 Bf8 22. Kh2 fxe4 23. fxe4 Bxb4 24. Qxb4 Rf8 25. Nd2 {[%cal Bb1d2,Bd2f3,Bf3g5][%mdl 32]} Bc8 {[%cal Rf4h3]} 26. Qc3 Qa7 27. Ndf3 Bxh3 28. Qxe5 Bg4 {Hoping for ...Nxg2!} 29. d6 Qf7 {White should prevent ...Nxg2!} 30. Rd2 Bd7 31. Ng5 Qg7 32. Qxg7+ Kxg7 33. g3 Ne6 34. Nxe6+ Bxe6 $11 {[%mdl 4096] Endgame KRB-KRN} 35. Nc2 {Nd4! is the strong threat.} Bd7 (35... Kf6 $1 $11) 36. Nb4 ({Better is} 36. e5 $1 $14 Re8 37. Rd5) 36... Rf3 {[#]} (36... Ra8 $11) 37. Kg2 $1 $16 {[%cal Rg2f3]} Re3 $2 {[#]} (37... c3 $16 38. Kxf3 cxd2) 38. Na6 $1 $18 Rd3 $2 (38... c3 39. bxc3 Kf8) 39. Rxd3 {White is clearly winning.} cxd3 40. Kf2 Kf6 41. Nc5 Bg4 {And now ...d2 would win.} 42. Ke3 h5 43. Kxd3 g5 44. Ke3 {Accuracy: White = 81%, Black = 56%.} 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.12"]
[Round "1.4"]
[White "Vidit, Santosh Gujrathi"]
[Black "Shankland, Sam"]
[Result "1-0"]
[ECO "E46"]
[WhiteElo "2721"]
[BlackElo "2683"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,63,7,-7,0,22,-3,0,-3,0,0,0,-2,-5,-11,-5,-12,91,50,111,104,97,104,102,110,100,100,105,100,107,102,108,111,177,137,179,175,357,357,357,357,356,354,398,412,512,508,885,841,1496,1430]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 Bb7 7. Bd3 d5 8. cxd5 exd5 9. Rc1 {E52: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5 6 Bd3 b6.} Re8 {[#] 9...Be7 is the modern continuation.} 10. Nb5 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 10. O-O a6 11. Ne5 Bd6 12. f4 c5 13. Be1 cxd4 14. exd4 Nc6 15. Ne2 Ne7 16. Qb3 {0-1 (36) Gupta,A (2581)-Meskovs,N (2557) chess.com INT 2019}) 10... Nc6 11. O-O {[#] And now Rxc6! would win.The position is equal.} Bf8 12. a3 a6 13. Nc3 Bd6 14. b4 Nb8 15. Qb3 c6 (15... Nbd7 $11 {keeps the balance.}) 16. Qb1 Bc8 ({Black should try} 16... Nbd7 $14) 17. e4 $16 dxe4 18. Nxe4 Nxe4 19. Bxe4 h6 20. Rfd1 Ra7 21. Ne5 Rc7 22. h3 (22. Nxc6 $6 Nxc6 23. Rxc6 (23. Bxc6 Bxh2+ {[%mdl 64] Decoy} 24. Kxh2 Qd6+ {[%mdl 64] Double Attack} 25. Kg1 Rxc6 $11) 23... Rxc6 $11) 22... Qh4 23. Re1 {Strongly threatening Nc4.} Rce7 (23... Be6 $16 {keeps fighting.}) 24. Bh7+ $18 Kf8 25. Re4 $36 {[%mdl 2048] Black is under strong pressure.} Qf6 $2 {[#]} (25... Qh5 {was worth a try.} 26. Bf4 (26. Nxc6 Nxc6 27. Rxc6 {[%mdl 64] Double Attack} Bf5 $11) 26... Bf5 27. Nd7+ Nxd7 28. Bxd6 {[%mdl 64] Pin} Bxe4 29. Bxe4 Qg5 30. Bxc6 (30. Rxc6 Kg8 $16) (30. Bxe7+ Rxe7 31. Bxc6 Nf6 $16) 30... Kg8) 26. Rf4 Bxe5 27. Rxf6 Bxf6 28. Bf4 Bg5 29. Bd6 ({Less strong is} 29. Bxb8 Bxc1 30. Bd6 Bf4 $16) 29... g6 30. Bxg6 {White is clearly winning.} fxg6 (30... Bxc1 $142 31. Qxc1 Kg7) 31. Qxg6 Nd7 32. Rc3 {Accuracy: White = 91%, Black = 48%.} 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.12"]
[Round "1.5"]
[White "Navara, David"]
[Black "Duda, Jan-Krzysztof"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2717"]
[BlackElo "2755"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,72,22,12,19,25,19,-33,61,25,18,-15,-12,-13,-16,-81,-70,-87,-79,-74,-60,-53,-58,-56,-62,-91,-98,-112,-125,-152,-144,-143,-152,-151,-151,-159,-160,-207,-185,-243,-233,-414,-411,-408,-408,-394,-367,-462,-429,-662,-695,-648,-634,-797,-779,-899,-875,-852,-818]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 h6 8. Bg2 Nc6 9. Be3 Be7 $1 {[%mdl 4] is currently scoring better than 9...Ne5. Played by Jan Krzysztof Duda in February 2020. B81: Sicilian Scheveningen: Keres Attack.} 10. f4 Nd7 11. Nf3 {[#]} (11. Bf2 $11) 11... g5 $1 $146 {[%mdl 8] A relevant novelty.} ({Better is} 11... b5 $15) ({Predecessor:} 11... b5 12. O-O O-O 13. Ne2 Bb7 14. Ng3 Rc8 15. Qd2 Nb6 16. b3 d5 17. Qf2 Nd7 18. exd5 {1-0 (48) Narayanan,S (2529)-Vidit,S (2707) Xingtai 2019}) 12. Ne2 gxf4 13. Bxf4 Nde5 14. Nxe5 Nxe5 15. Ng3 (15. Qd2 $11 {remains equal.}) 15... Qb6 $17 16. Bxe5 dxe5 17. Qf3 Bg5 {And now ...Bd7 would win.} 18. h4 Qe3+ 19. Qxe3 Bxe3 20. Ke2 {White is on the road to losing.} Ba7 21. Rad1 Bd7 22. Kf3 Ke7 23. Rh2 Rhg8 24. Bh3 Ba4 25. Rhd2 Rac8 26. Bf1 Rg6 (26... Rxc2 27. Rxc2 Bxc2 28. Rc1 $11) (26... Bxc2 27. Rd7+ Kf8 28. R1d2 $15) 27. Nh5 (27. b3 {was worth a try.} Bc6 28. Bh3) 27... Bd4 $19 ({Weaker is} 27... Rxc2 28. Rxc2 Bxc2 29. Rc1 $17) ({Not} 27... Bxc2 28. Rd7+ Kf8 29. R1d2 $15) 28. Bd3 $2 (28. b3 Bc6 29. Bh3) 28... Rcg8 29. Rg2 f5 30. exf5 Bc6+ {[%mdl 64] [#] Skewer} 31. Ke2 exf5 {Black is clearly winning.} ({Inferior is} 31... Bxg2 32. fxg6 Bxb2 33. Ng3 $11) 32. Ng3 (32. Rh2 $142 Rxg4 33. Bxf5 Rg2+ 34. Rxg2 Rxg2+ 35. Kd3) 32... Bxg2 33. Nxf5+ Kf6 34. Nxd4 Rxg4 {[%mdl 64] [#] Double Attack} 35. Nf5 e4 36. Nxh6 Bf3+ {Accuracy: White = 45%, Black = 92%.} 0-1

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.13"]
[Round "2.1"]
[White "Shankland, Sam"]
[Black "Navara, David"]
[Result "1/2-1/2"]
[ECO "E06"]
[WhiteElo "2683"]
[BlackElo "2717"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,75,15,18,14,9,11,11,13,11,17,11,23,0,6,3,12,0,4,0,15,17,18,0,0,0,0,0,0,0,0,-2,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bf4 Bd6 {E05: Open Catalan: 5 Nf3 Be7.} 11. Qc1 a5 {11...Nbd7 is the fancy move.} 12. Nc3 Bxf4 13. Qxf4 Qd6 {[#]} 14. Rfc1 $146 ({Predecessor:} 14. Qh4 Bxf3 15. Bxf3 c6 16. Rfd1 Qb4 17. Rab1 Nd5 18. Be4 h6 19. Bc2 Qe7 20. Qe4 {1-0 (56) Gupta,A (2654)-Sachdev,T (2398) Pune 2016}) 14... Na6 15. Ne5 Bxg2 {The position is equal.} 16. Kxg2 Rad8 17. e3 c5 18. Nb5 Qd5+ 19. Qf3 cxd4 20. exd4 Qxf3+ 21. Kxf3 Nd5 22. Nc4 b6 $1 23. Ne3 Nab4 24. Rc4 Rd7 25. Ke2 Rfd8 26. Rac1 Na2 (26... g5 {with more complications.} 27. Rc8 Kf8 28. Ng4 f6 29. Ne3 Ke7) 27. Rd1 Nab4 28. Nxd5 Rxd5 29. Rdc1 e5 30. Rc8 {next Rxd8+ is good for White.} exd4 31. Rxd8+ Rxd8 32. Nxd4 $11 {[%mdl 4096] Endgame KRN-KRN} g6 33. Rc4 Kg7 34. h4 h5 35. b3 {[%cal Bb2b3,Bb3b4][%mdl 32]} Na6 36. Nf3 Re8+ 37. Kf1 Nc5 38. b4 {Accuracy: White = 100%, Black = 100%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.13"]
[Round "2.2"]
[White "Grandelius, Nils"]
[Black "Firouzja, Alireza"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2659"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "160"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,160,19,16,21,22,22,18,21,16,18,14,27,20,26,1,7,0,0,8,18,4,31,0,0,0,0,0,0,0,2,0,6,9,9,8,27,27,27,22,30,39,29,27,31,27,20,22,23,14,51,36,123,122,119,122,157,145,178,178,180,166,173,173,156,70,79,79,60,72,102,102,102,72,80,77,79,78,85,81,113,113,113,113,113,113,113,113,173,173,166,166,166,166,166,166,166,166,166,166,166,8,8,8,8,8,8,8,8,8,166,166,166,8,8,8,27,8,8,8,166,8,8,8,8,0,8,0,8,0,166,166,166,166,166,166,166,166,166,166,235,235,235,235,235]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O 9. d4 Bf6 10. Re1 Re8 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} 11. Bf4 Rxe1 12. Qxe1 Ne8 {The position is equal.} 13. c3 d5 14. Nd2 g6 15. Nf3 c6 16. Bd3 Ng7 17. Bh6 {[#]} Nf5 $146 ({Predecessor:} 17... Be6 18. h3 Qc7 19. Qd2 Re8 20. Re1 Qc8 21. g4 Be7 22. Qf4 {½-½ (22) Yusin,J-Sodomski,A (2295) ICCF email 2018}) 18. Bxf5 Bxf5 19. h3 Be4 20. Nd2 Qe7 21. Qe3 Re8 22. Qf4 Bf5 23. Nf3 Qd8 24. Ne5 Be7 25. g4 Be6 26. Re1 Bd6 27. Bg5 Qb6 28. b4 Qc7 29. Bf6 b6 30. h4 c5 $1 31. bxc5 ({Much worse is} 31. Qh6 Bf8 $15) 31... bxc5 32. h5 {aiming for Qg5.} cxd4 33. cxd4 $40 {[%mdl 128] White has some attack.} Qc3 (33... Qa5 $5 {[%cal Ra5e1]} 34. Rb1 Qxa2 $11) 34. Rb1 {[%cal Be1b1,Bb1b7,Bb7a7][%mdl 32]} Bf8 (34... Qc2 $14 35. Rb7 Qd1+ 36. Kg2 Bxe5 37. Bxe5 Qxg4+ 38. Qxg4 Bxg4) 35. hxg6 $16 fxg6 36. Kg2 Qc2 37. Rb7 {White wants to mate with Rxh7!} Rc8 38. Rxa7 Qe4+ 39. Qxe4 dxe4 40. a4 Bd5 41. Rd7 (41. Ra5 $1 $16 {[%cal Ra5d5]} Bb7 42. Rb5) 41... Be6 $14 42. Rd8 Rxd8 43. Bxd8 $16 {[%mdl 4096] Endgame KBB-KBN} Bd6 44. Kg3 Kf8 45. Kf4 Bd5 46. a5 {[%cal Ba4a5,Ba5a6,Ba6a7][%mdl 32]} Ke8 {[#]} 47. Bb6 $1 Bb4 {[#]} 48. Ke3 $1 Ba3 49. a6 Bc1+ 50. Ke2 Bf4 51. a7 Ke7 52. Ke1 Bxe5 (52... Bb7 $16 {keeps fighting.}) 53. dxe5 {KB-KB} Ke6 54. Bc7 h5 55. gxh5 gxh5 56. Kf1 h4 57. Kg1 h3 58. Kh2 e3 59. f4 $2 (59. fxe3 $18 Bg2 60. Bd6) 59... e2 $11 60. Ba5 Bg2 61. Be1 $1 Kf5 $1 62. Kg1 Bd5 63. Bg3 Kg4 $2 (63... Bf3 $1 $11 {and Black stays safe.} 64. Kh2 Bg2) 64. Kh2 $18 {Black must now prevent e6!} Kf5 65. Bf2 $2 ({White has to play} 65. Kxh3 $18 e1=B 66. Bxe1 Kxf4 67. Bc3) 65... Bg2 $1 $11 66. Kg3 Bd5 67. Be1 Bg2 $1 68. Bd2 Bd5 $2 (68... Ke6 $1 $11 {and Black has nothing to worry.}) 69. Kh2 $2 (69. Kxh3 $18 e1=B 70. Bxe1 Kxf4 71. Bc3) 69... Bg2 70. Kg1 Bc6 71. Be1 {With the idea Kh2.} Bd5 72. Bg3 {And now Kf2 would win.} Kg4 73. Kh2 $2 (73. Bf2 $11 Kf5 74. Kh2) 73... Kf5 $1 $18 74. Kxh3 {Hoping for Kh4.White is clearly better.} e1=Q 75. Bxe1 Kxf4 76. Bg3+ Kf5 77. Kh4 Ke6 78. Kg5 Kd7 (78... Be4 {might work better.}) 79. Kf6 {Strongly threatening e6+.} Kc8 80. e6 {Intending e7 and mate.} Kb7 {Accuracy: White = 79%, Black = 80%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.13"]
[Round "2.3"]
[White "Anton Guijarro, David"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2697"]
[BlackElo "2721"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,98,17,19,10,10,16,14,14,12,5,10,14,6,8,18,12,15,19,16,9,17,10,3,6,6,16,0,0,0,18,0,28,9,40,31,41,39,47,26,18,18,35,0,-12,-22,-7,-9,0,-6,0,0,0,0,11,12,16,0,12,12,55,0,0,0,19,22,243,219,170,239,241,240,235,216,226,215,205,186,166,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. Qa4+ Nc6 8. e3 O-O {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 9. Be2 dxc4 10. O-O Bd7 11. Bxc4 Bxc3 12. bxc3 Rfd8 {Threatening ...Nxd4.} 13. Be2 Be8 {...Nxd4 is the strong threat.} 14. Qa3 Qe7 15. Qb2 b6 16. c4 Na5 {[%cal Bc6a5,Ba5b7,Bb7c5][%mdl 32]} 17. e4 Qf6 {[#]} 18. Qd2 $146 ({Predecessor:} 18. Rad1 c5 19. e5 Qf4 20. dxc5 Nxc4 21. Qc1 Qxc1 22. Rxc1 Na5 23. cxb6 axb6 24. Rb1 {½-½ (32) Ding,L (2801)-Giri,A (2776) Kolkata 2019}) 18... e5 {[%cal Re5d4]} 19. d5 Bd7 20. Qe3 Nb7 21. Nd2 Nc5 22. Nb3 Qd6 23. g3 Re8 24. Rfc1 a5 25. Nxc5 Qxc5 26. Qxc5 bxc5 27. Rab1 Reb8 28. Rb5 a4 29. a3 Bxb5 30. cxb5 $11 {[%mdl 4096] Endgame KRR-KRB} Kf8 31. Rxc5 Ra7 32. Kg2 Rb6 33. f4 exf4 34. gxf4 g5 35. Kf3 gxf4 36. e5 Rg6 37. Kxf4 (37. Bd3 $14 Rb6 38. Kxf4) 37... Rg2 38. Bg4 Rd2 39. Ke3 Rb2 $2 ({Avoid the trap} 39... Rxh2 $2 40. d6 $18) (39... Ra2 $11 {and Black has nothing to worry.}) 40. d6 $1 $18 {[%cal Rd6c7]} cxd6 41. exd6 Ra8 42. d7 $1 {[%mdl 1024] White threatens Rc8+ and mate. White has strong compensation.} Rd8 43. Kd4 $1 Ke7 44. Re5+ Kd6 {[#] Threatens to win with ...Rd2+.} 45. Rd5+ $1 Kc7 {[#]} 46. Kc5 $2 ({Only move:} 46. Ke5 $1 $18) 46... Rc2+ $1 $11 {The position is equal.} (46... Rxh2 $6 47. b6+ Kb7 48. Kd6 $16) 47. Kb4 {aiming for Rc5+.} Rb2+ 48. Kc5 Rc2+ $1 ({But not} 48... Rxh2 49. b6+ Kb7 50. Kd6 $16) 49. Kb4 {And now Rc5+ would win.} Rb2+ {Accuracy: White = 92%, Black = 86%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.13"]
[Round "2.4"]
[White "Harikrishna, Pentala"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2713"]
[BlackElo "2755"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,61,0,25,-4,0,-4,0,-2,-2,-7,0,-7,-7,-7,-7,-6,-6,-11,-10,-6,-8,-9,-6,-5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Nd2 c5 5. dxc5 Bxc5 6. Bg2 Nc6 7. Ngf3 b6 8. O-O Bb7 9. b3 O-O 10. Bb2 d5 11. cxd5 Nxd5 12. Ne4 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Be7 {The position is equal.} 13. Nd4 Rc8 14. Rc1 Qd7 15. Nxc6 Bxc6 {[#]} 16. Nc3 $146 (16. a3 {seems wilder.} Rfd8 17. e3 f5 18. Qd4 Bf8 19. Nd2) ({Predecessor:} 16. Qd4 f6 17. Rfd1 Rfd8 18. Bh3 Bf8 19. Rd2 Qe8 20. Rcd1 Bb4 21. Ng5 e5 22. Qe4 Qg6 23. Be6+ Kh8 24. Nf7+ Qxf7 25. Bxf7 Bxd2 26. Rxd2 Ne7 27. Rxd8+ Rxd8 28. Qc2 {1-0 (27) Dragicevic,D (2306)-Kjartansson,G (2464) Vaxjo 2017}) 16... Nxc3 17. Rxc3 Qxd1 18. Rxd1 Bb5 19. Bf3 Rxc3 20. Bxc3 Rc8 21. Bd2 Rd8 22. Kf1 Bb4 23. Ke1 Rxd2 24. Rxd2 $11 {[%mdl 4096] Endgame KRB-KB} Kf8 25. a3 Bc3 26. Kd1 {[#] And now Rd8+ would win.} Bxd2 27. Kxd2 Ke7 28. e3 Kd6 29. Be4 h6 30. Kc3 f6 31. f4 {Accuracy: White = 93%, Black = 100%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.13"]
[Round "2.5"]
[White "Ragger, Markus"]
[Black "Vitiugov, Nikita"]
[Result "1/2-1/2"]
[ECO "C11"]
[WhiteElo "2670"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,72,23,4,30,0,0,0,0,0,0,0,0,0,10,0,13,21,13,0,0,0,37,37,41,22,54,51,51,48,48,45,64,62,65,62,91,58,66,54,59,39,33,29,39,45,33,23,24,25,85,29,26,33,36,30,29,0,34,0,40]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. a3 Qb6 {C11: French: Classical System: 4 e5 and 4 Bg5 dxe4.} 9. Be2 cxd4 10. Nxd4 Bc5 {[%cal Rc5d4]} 11. Na4 Qa5+ {[%mdl 64] [#] Double Attack} 12. c3 {Strongly threatening Nxc6.} Bxd4 13. Bxd4 Nxd4 14. Qxd4 Qc7 {And now ...b5 would win.} 15. b4 O-O 16. O-O b5 17. Nb2 $1 Bb7 18. a4 bxa4 {[#]} 19. Rxa4 $146 ({Predecessor:} 19. Nxa4 Rfc8 20. Rfb1 g6 21. Ra3 Bc6 22. Nb2 Bb5 23. Kf2 Bxe2 24. Kxe2 a5 25. Rba1 {½-½ (65) Szalanczy,E (2347)-Horvath,D (2349) Budapest 2011}) 19... Rfc8 20. Ra3 $1 a5 21. b5 Nc5 22. Rfa1 Rab8 23. Na4 Ne4 24. Bd3 h6 {[#]} 25. c4 $1 {[%mdl 512]} Nc5 (25... dxc4 26. Bxe4) 26. Qxc5 Qxc5+ 27. Nxc5 Rxc5 28. cxd5 Rxd5 29. Bf1 Rd4 30. g3 Bd5 31. Rxa5 Rd2 (31... Rb4 $11) 32. Rc1 ({Better is} 32. Rb1 $16) 32... Rb2 $11 33. Raa1 Be4 $1 34. Ra4 Bd5 35. Raa1 Be4 $1 36. Ra4 Bd5 $1 {Accuracy: White = 86%, Black = 80%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.14"]
[Round "3.1"]
[White "Firouzja, Alireza"]
[Black "Harikrishna, Pentala"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2726"]
[BlackElo "2713"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,79,21,18,13,12,19,7,26,29,31,27,20,28,73,64,64,66,52,35,31,22,72,59,62,76,77,34,66,43,46,45,86,86,102,96,94,45,126,128,128,102,152,152,146,128,282,291,304,276,299,285,576,570,658,604,653,629,655,648,630,599,679,664]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} 11. d4 Qc7 12. d5 Nc4 {The position is equal.} 13. b3 Nb6 14. a4 {[#]} c4 $146 ({Predecessor:} 14... bxa4 15. bxa4 Nc4 16. Bd3 Na5 17. Nbd2 c4 18. Bc2 Bd7 19. Ba3 Nb3 20. Bxb3 cxb3 21. Qxb3 {½-½ (104) Manik,M (2407)-Paravyan,D (2531) Pardubice 2017}) 15. axb5 axb5 16. Rxa8 Nxa8 17. bxc4 bxc4 18. Ba3 Nd7 19. Bb4 Nc5 20. Qe2 Nb6 21. Nbd2 f5 22. Rd1 g6 23. Qe3 f4 24. Qe2 Ba6 25. Ra1 Ra8 26. Qf1 Qc8 27. Ra5 {Bxc5 is the strong threat.} Ncd7 (27... Nb3 $1 $14) 28. Qa1 Bb5 29. Nb1 g5 30. Rxa8 Nxa8 31. Qa7 Nc7 $2 {[#]} (31... Qa6 $16 32. Qxa6 Bxa6) 32. Na3 $18 {Black must now prevent Ba5.} Ba6 33. Ba4 {Strongly threatening Bxd7.} Nf6 34. Nxg5 Nfxd5 $2 (34... Qb7 35. Qxb7 {[%mdl 64] Overworked Piece} Bxb7 36. Nxc4 h6 37. Nxd6 Bxd5 38. exd5 hxg5) 35. exd5 {White is clearly winning.} Bxg5 36. Bxd6 {[%mdl 64] [#] Double Attack} Nxd5 37. Bd7 Qb7 38. Be6+ Kg7 39. Bxe5+ Bf6 40. Qd4 {[%mdl 64] Double Attack. Accuracy: White = 88%, Black = 53%.} 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.14"]
[Round "3.2"]
[White "Navara, David"]
[Black "Anton Guijarro, David"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "2717"]
[BlackElo "2697"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,82,28,27,31,18,24,16,24,16,23,19,29,19,31,6,17,4,0,0,36,34,75,68,81,25,33,22,46,29,44,33,45,23,62,0,0,0,22,-4,0,-33,0,0,0,-50,0,0,0,-26,-26,-91,-86,-131,-113,-156,-108,-130,-36,-266,-204,-872,-854,-838,-842,-887,-836,-809,-785]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 8. Nf3 Ne4 9. Bf4 Ndf6 {D35: Queen's Gambit Declined: Exchange Variation.} 10. Qc2 O-O 11. O-O {[%cal Rc3e4]} Bf5 {The position is equal.} 12. Ne5 g6 13. f3 Nd6 14. Rad1 Bxd3 15. Rxd3 {[#]} a6 $146 ({Predecessor:} 15... Nh5 16. Bh6 Re8 17. e4 Bg5 18. Bxg5 Qxg5 19. f4 Qd8 20. exd5 cxd5 21. Nxd5 Rc8 {1-0 (59) Navara,D (2742)-Hammer,J (2651) Novy Bor 2016}) 16. Kh1 Rc8 17. e4 Nb5 18. Qb3 Kg7 19. a4 Nxc3 20. bxc3 (20. Rxc3 $16 Rc7 21. Ng4) 20... b5 $11 21. Qa2 Nh5 22. Bc1 Nf6 23. axb5 axb5 24. Qd2 Ng8 25. Re3 (25. Qe2 $14) 25... dxe4 26. Rxe4 Qd5 27. Rfe1 Ra8 28. Ng4 Bd6 29. R4e2 Rfd8 30. Bb2 Kf8 31. Ne5 Kg7 32. Bc1 Re8 33. h4 (33. Qb2 $11) 33... f6 $17 34. Ng4 Rxe2 35. Rxe2 Bg3 {Threatens to win with ...Ra1.} 36. Kg1 Qh5 (36... Bxh4 $17 37. Ne3 Qd6) 37. Qe3 $2 {White does not recover from this.} (37. Ne3 $15) 37... Qxh4 {...Ra1 is the strong threat.} 38. Qe6 $2 {[#]} (38. Bb2) 38... Ra1 $1 {Black is clearly winning.} 39. Rc2 h5 40. Ne3 Qh2+ 41. Kf1 {[#]} Rxc1+ $1 {[%mdl 512] Accuracy: White = 56%, Black = 69%.} 0-1

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.14"]
[Round "3.3"]
[White "Duda, Jan-Krzysztof"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2755"]
[BlackElo "2683"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,83,29,18,14,18,18,0,0,0,0,0,0,0,0,0,0,0,8,0,29,2,18,25,35,0,0,-91,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-357,-325,-245,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nde2 h5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 8. Bg5 Be6 9. Bxf6 Qxf6 10. Nd5 Qd8 11. Qd3 Nd7 12. O-O-O g6 13. Kb1 Nc5 14. Qa3 Bg7 {[#]} 15. h4 $146 ({Predecessor:} 15. Nec3 O-O 16. h4 b5 17. f3 f5 18. exf5 gxf5 19. Be2 Rb8 20. b4 e4 21. bxc5 {0-1 (31) Faerber,D (2282)-Gokerkan,C (2413) Karlsruhe 2019}) 15... Rb8 16. Nec3 O-O 17. f3 f5 18. Ne3 b5 {Threatens to win with ...b4.} 19. b4 (19. Ned5 $1 $11 {remains equal.}) 19... Bh6 (19... fxe4 $17 20. Nxe4 Nxe4 21. fxe4 Rf4) 20. Ned5 fxe4 21. bxc5 b4 $1 $36 {[%cal Rb4a3][%mdl 2048] Black fights for an advantage.} 22. Nxb4 a5 {[%mdl 64] Pin} 23. Rxd6 axb4 24. Qa6 $1 bxc3+ 25. Ka1 {[#]} Qxd6 $1 {[%mdl 512]} 26. Qxd6 Bf7 {White must now prevent ...Rfd8.} 27. Be2 $2 {[%mdl 8192] [#]} ({Wrong is} 27. Qxe5 $2 {[#]} Rb2 $1 $19 {[%mdl 512]}) (27. Qc6 $1 $11) 27... Rb2 $1 $19 {[%mdl 512]} 28. Qa6 {And now Bc4 would win.} Rxa2+ $2 (28... Rxc2 $19 {...exf3 is the strong threat.} 29. c6 (29. Bc4 $2 Rxg2 30. Bf1 Rxa2+ 31. Qxa2 Bxa2 $19) 29... Rxa2+ 30. Qxa2 Bxa2 31. Kxa2 c2) 29. Qxa2 $11 {The position is equal.} Bxa2 30. Kxa2 $19 {[%mdl 4096] Endgame KRB-KRB} Rc8 31. fxe4 Rxc5 32. Kb3 Kg7 33. Rh3 Bd2 34. g4 hxg4 35. Bxg4 Rb5+ 36. Kc4 Rb2 37. Bd1 Rb1 38. Rh1 Kh6 39. Kd5 Bf4 40. Kc4 Bd2 41. Kd5 Bf4 42. Kc4 {Accuracy: White = 89%, Black = 91%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.14"]
[Round "3.4"]
[White "Vitiugov, Nikita"]
[Black "Grandelius, Nils"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2731"]
[BlackElo "2659"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,77,18,15,0,0,0,0,0,10,6,16,14,7,13,15,7,3,5,12,0,0,0,0,-21,-27,-23,0,-23,-24,-43,-42,-39,-29,-47,-41,-50,-52,-35,-43,-139,0,0,8,8,8,8,8,8,8,8,9,8,8,8,13,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 g6 3. Nbd2 Bg7 4. e4 O-O 5. Bd3 d6 6. O-O Nc6 7. c3 e5 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Nc4 Nh5 11. Re1 {B07: Pirc Defence: Miscellaneous Systems.} Nf4 12. Bf1 Qf6 {[#]} 13. a4 $146 ({Predecessor:} 13. Be3 Rd8 14. Qc2 h5 15. Rad1 Rxd1 16. Rxd1 Bg4 17. f3 Be6 18. Qd2 h4 19. Nxe5 Nxg2 20. Bd4 h3 21. Bxg2 hxg2 22. Qxg2 Rd8 23. Nc6 bxc6 {0-1 (23) Kalegin,E (2482)-Zubov,A (2617) Voronezh 2012}) 13... a5 14. Be3 Rd8 15. Qc2 b6 16. b4 Bb7 17. f3 Ne6 18. Red1 Rxd1 19. Rxd1 axb4 20. cxb4 Nd4 21. Bxd4 exd4 22. Bd3 Qc6 23. b5 Qc5 24. Rb1 Bc8 25. f4 Be6 26. Kh1 Bh6 27. f5 gxf5 28. exf5 Bd5 29. Qe2 {[#]} (29. f6 $15) 29... Kh8 ({But not} 29... Rxa4 $6 30. Qg4+ Kh8 31. Qh4 $11) ({Black should try} 29... f6 $1 $17 30. Nb2 Kh8) 30. Qe5+ $11 {The position is equal.} f6 $132 {[%mdl 2048] Black puts up resistance} 31. Qxf6+ Bg7 32. Qh4 {And now f6 would win.} Bxc4 33. Be4 $1 {[#] Hoping for f6.} Bd5 {...Bxe4 is the strong threat.} 34. f6 {[%csl Ge4][%cal Rh4h7]} Bxe4 35. fxg7+ Kxg7 36. Qxe4 Rd8 37. Qd3 Qe5 38. Rd1 Rd6 39. Kg1 {Accuracy: White = 92%, Black = 96%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.14"]
[Round "3.5"]
[White "Vidit, Santosh Gujrathi"]
[Black "Ragger, Markus"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2721"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,91,5,6,0,0,-7,20,7,16,20,26,12,13,10,22,11,12,0,42,46,31,41,32,45,57,0,52,52,55,42,44,47,48,41,43,27,25,25,47,24,24,0,8,4,16,16,12,26,46,31,34,34,54,40,98,96,200,200,200,186,212,186,186,186,186,186,725,710]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Nf3 Qa5 9. Qd2 Nc6 10. Rb1 a6 11. Rc1 cxd4 12. cxd4 Qxd2+ 13. Kxd2 e6 14. Bd3 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} O-O 15. h4 h6 {scores much better than the old 15...Rd8.} 16. Rc5 {The position is equal.} Rd8 {[%cal Rc6d4]} 17. Rb1 {[#]} Bf8 $146 ({Predecessor:} 17... Nxd4 18. Bxd4 Bxd4 19. Nxd4 Rxd4 20. Ke3 Rd8 21. Rb6 Bd7 22. a4 Bxa4 23. Rxb7 a5 {½-½ (35) Kermer,W (2398)-Meyer,F (2130) ICCF email 2018}) 18. Rc4 Bd7 19. Rb6 Be8 20. Rc1 Bg7 21. e5 Bf8 22. Rxb7 Nb4 23. Bc4 Bc6 24. Rc7 Bb5 25. Bb3 (25. Rb1 $14) 25... Nd5 (25... Nd3 $11) 26. Bxd5 $1 $14 Rxd5 27. Rc8 Rd8 28. Rxa8 Rxa8 29. Bf4 Kg7 30. Rc7 Bb4+ 31. Ke3 Rd8 32. g4 Rd7 33. Rc8 a5 34. Bg3 Ba6 35. Rc2 Bb7 36. Ng1 g5 37. f4 gxf4+ 38. Bxf4 Be7 39. h5 Ba6 (39... a4 $14) 40. Nf3 $16 Bb4 (40... Rb7 $16) 41. g5 $18 hxg5 42. Nxg5 Bb7 {[#]} 43. Ne4 $1 Be7 44. Nd6 Bd5 {[#]} 45. h6+ $1 Kg6 $2 (45... Kh7 46. Nxf7 Bh4) 46. Rc1 {Accuracy: White = 97%, Black = 74%.} 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.15"]
[Round "4.1"]
[White "Ragger, Markus"]
[Black "Navara, David"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2670"]
[BlackElo "2717"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,120,28,6,15,13,7,11,13,6,15,18,25,7,14,5,12,11,9,14,10,18,25,0,13,39,23,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8,-31,-31,-31,-31,-31,-31,-31,-31,-31,-31,-31,-31,-31,-31,-31,0,0,0,0,0,0,0,-31,-31,-37,-31,-43,-6,-19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. O-O O-O 6. c3 d6 7. Re1 {is cutting edge theory.} h6 8. h3 a5 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 9. Nbd2 {[%cal Bb1d2,Bd2f1,Bf1g3][%mdl 32]} a4 10. Bb5 Bd7 11. Nf1 Ne7 12. Bxd7 Nxd7 13. Ng3 f5 14. d4 Bb6 15. exf5 Nxf5 16. Nxf5 Rxf5 17. Be3 exd4 18. Bxd4 {[#]} c5 $146 ({Predecessor:} 18... Qf8 19. Qc2 Qf7 20. Nh4 Rg5 21. Rad1 Bxd4 22. cxd4 Nf6 23. Rd3 Rh5 24. g3 Qd7 {½-½ (35) Noble,M (2482)-Holroyd,K (2510) ICCF email 2015}) 19. Be3 Qf6 20. Nd2 d5 21. g4 Re5 {[#] Hoping for ...d4.} 22. Nf3 d4 23. Nxe5 Nxe5 24. f4 dxe3 25. fxe5 Qxe5 {Strongly threatening ...Qg3+.} 26. Qe2 c4 27. Kh1 Kh8 28. Qxc4 Re8 {Threatens to win with ...e2.} (28... Rf8 $5 29. Rf1 $8 Rd8 $11) 29. Qe2 $1 a3 30. bxa3 Ba5 31. Rf1 Bxc3 32. Rad1 Qe4+ 33. Kg1 Bd4 34. Rfe1 Bc5 {White must now prevent ...Rf8.} 35. Rc1 b6 36. a4 Rf8 {( -> ...Rf2)} 37. Rxc5 $1 Rf2 {[%csl Gf2][%cal Re4g2]} 38. Rc8+ Kh7 {[%csl Gf2][%cal Re4g2]} 39. Qxf2 $1 exf2+ {[%mdl 64] [#] Discovered Attack} 40. Kxf2 $15 {[%mdl 4096] Endgame KQ-KRR} Qf4+ 41. Kg2 Qd2+ {[%mdl 1024] Black has compensation.} 42. Kf1 Qd3+ 43. Kg2 Qd5+ 44. Kg3 Qd6+ 45. Kg2 Qd2+ 46. Kf1 Qxa2 {And now ...Qf7+ would win.} 47. Rc3 Qxa4 48. Ree3 Qa2 49. Ke1 {The position is equal.} b5 50. Rb3 Qa1+ 51. Kd2 Qd4+ 52. Kc2 b4 53. Rf3 Qc4+ 54. Kb2 Qe2+ 55. Kb1 Qd1+ 56. Kb2 Qd2+ 57. Kb1 Kg6 58. Rbd3 Qe2 59. Rd6+ Kg5 60. Rd5+ Kg6 {Accuracy: White = 100%, Black = 95%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.15"]
[Round "4.2"]
[White "Harikrishna, Pentala"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2713"]
[BlackElo "2683"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,95,-8,-13,0,0,0,0,0,0,0,0,0,0,0,-15,-23,-24,-19,-21,-19,-30,-10,-13,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,8,8,8,8,8,8,8,8,8,8]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. O-O Be7 8. Bb3 O-O 9. f4 Nc6 10. Kh1 Nxd4 11. Qxd4 b5 12. f5 b4 {B88: Sicilian: Sozin Attack.} 13. Qxb4 d5 14. Qd4 {And now fxe6 would win.} dxe4 15. Qxd8 $1 Rxd8 16. fxe6 Bxe6 17. Bg5 h6 18. Bxf6 Bxf6 19. Bxe6 fxe6 20. Nxe4 Bxb2 21. Rab1 {[#]} Rd4 $146 ({Predecessor:} 21... Bd4) 22. Rfe1 {The position is equal.} Ba3 23. c3 Ra4 24. g3 Rc8 25. Kg2 Rc6 26. Re2 Bd6 27. Rb7 Be5 28. Rb4 Rxb4 29. cxb4 $11 {[%mdl 4096] Endgame KRB-KRN} Bd4 30. Nc5 Bc3 31. Rxe6 Rxe6 32. Nxe6 Bxb4 {KB-KN} 33. Nc7 a5 34. Kf3 Kf7 35. Ke4 Bd6 36. Nb5 Bb8 37. a4 h5 38. Na3 Ke6 39. Nc4 Bc7 40. h3 Bxg3 41. Nxa5 g5 42. Nc6 g4 43. Nd4+ Kd6 44. hxg4 hxg4 45. Nf5+ Kc5 46. Nxg3 {[#] Threatens to win with Ne2.} Kb4 47. Kf4 Kxa4 48. Kxg4 {Accuracy: White = 100%, Black = 100%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.15"]
[Round "4.3"]
[White "Firouzja, Alireza"]
[Black "Vitiugov, Nikita"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2726"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,89,13,0,42,18,17,0,0,0,0,0,1,0,0,0,12,-19,-5,-10,-16,0,0,-35,0,-18,-18,-19,-20,-17,0,-21,-12,-33,-17,-90,0,0,249,249,254,250,249,246,1049,1020,758,1045,1060,1025,980,215,347,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 10. a4 Bb7 11. Re1 Re8 12. Nbd2 Bf8 {C92: Closed Ruy Lopez: 9...Be6, Karpov and Flohr-Zaitsev Variations.} 13. Nf1 Na5 14. Bc2 c5 15. Ne3 {[#]} Qd7 $146 ({Predecessor:} 15... g6 16. Bd2 c4 17. axb5 axb5 18. dxc4 bxc4 19. Qb1 Qc7 20. Ng4 Nxg4 21. hxg4 Nb3 22. Rxa8 Rxa8 23. Bxb3 cxb3 {½-½ (53) Reyes Larena,J (2445)-Hebden,M (2455) Vrnjacka Banja 1989}) 16. Nh2 d5 17. axb5 axb5 {[%cal Rd5e4]} 18. Qf3 c4 19. Nhg4 Nxg4 20. Nxg4 {Hoping for Qg3.} dxe4 21. dxe4 Qe6 22. Qg3 Kh8 (22... h5 $5 {[%cal Rh5g4]} 23. Nh6+ Kh7 $15) 23. f4 exf4 24. Bxf4 Nb3 25. Rad1 Rad8 26. e5 Nc5 27. Rxd8 Rxd8 28. Nf6 (28. Be3 $11) 28... gxf6 (28... Qb6 $1 $17 29. Ng4 Nd3+ 30. Be3 Qg6) 29. Qh4 $1 $40 {[%mdl 128] White mounts an attack.} Rd3 $2 (29... Kg8 $11 {and Black stays safe.} 30. Re3 Rd3 $1 {[%mdl 512]} 31. Bxd3 Nxd3 32. exf6 Be4) 30. Bxh6 $18 Bxh6 31. exf6 {[%mdl 64] Discovered Attack} Qxe1+ 32. Qxe1 Ne4 $2 {[#]} (32... Be4 33. b4 (33. Bxd3 cxd3 34. Qh4 Kh7 $11) 33... Be3+ 34. Kf1 Ne6 35. Qh4+ {[%mdl 64] Double Attack} Bh7) 33. Qh4 $1 {[%cal Rh4h6][%mdl 512]} Kh7 34. Qh5 Nd6 35. g4 Bf3 36. Qe5 $2 (36. h4 {And now Kf1 would win.} Bd1 37. Bb1) 36... Bf8 (36... Be4 {keeps fighting.} 37. h4 (37. Bxd3 cxd3 38. Qxd6 d2 $11) 37... Bf8 38. Bxd3 cxd3) 37. Kf2 $2 (37. Bxd3+ $18 cxd3 38. Qd4) 37... Ne4+ $11 {The position is equal.} 38. Kf1 Kg8 39. Qxb5 Rd5 40. Qb8 Rd2 41. Bxe4 $1 Bxe4 42. h4 Bd3+ 43. Kg1 Be4 44. Kf1 Bd3+ 45. Kg1 {Accuracy: White = 78%, Black = 70%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.15"]
[Round "4.4"]
[White "Anton Guijarro, David"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2697"]
[BlackElo "2755"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,60,16,16,16,30,26,26,22,47,40,60,33,44,37,47,23,27,9,31,31,31,39,50,0,0,3,4,0,0,0,26,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-4,0]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. h4 Bg7 6. e4 {A16: English Opening: 1...Nf6 with ...d5.} Nxc3 7. dxc3 Qxd1+ 8. Kxd1 {White has an edge.} Bg4 9. Kc2 Nd7 10. Nd4 e5 11. Nb5 Kd8 {[#]} 12. f3 $146 ({Predecessor:} 12. a4 a6 13. Na3 Be6 14. Be3 f5 {½-½ (14) Gauri,S (2364)-Rohan,A (2388) Charlotte 2018}) 12... Be6 13. h5 a6 (13... c6 $5 {[%cal Rc6b5]} 14. Na3 b5 $11) 14. Na3 $1 b5 15. Nb1 c6 16. Be3 Kc7 17. a4 Rhb8 18. Nd2 Bf8 19. Nb3 Nb6 (19... Be7 {is more complex.} 20. Be2 bxa4 21. Na5 Bb3+ 22. Nxb3 axb3+ 23. Kd2 Rd8) 20. axb5 axb5 {[#] ...Bxb3+ is the strong threat.The position is equal.} 21. Rxa8 Rxa8 22. hxg6 hxg6 23. Rh8 Rd8 24. Nc1 Be7 25. Rxd8 Bxd8 26. Nd3 Nd7 27. Nc5 Nxc5 28. Bxc5 Kd7 29. b4 Bh4 30. Bd3 Bg3 {Accuracy: White = 90%, Black = 94%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.15"]
[Round "4.5"]
[White "Grandelius, Nils"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "2659"]
[BlackElo "2721"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,70,7,20,0,6,5,2,8,17,10,12,12,8,9,4,0,1,0,1,0,24,21,25,9,13,16,27,18,26,15,35,18,29,11,27,28,35,35,42,34,44,22,44,44,43,44,45,0,0,0,0,0,12,8,8,8,9,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. c3 d5 6. exd5 {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5.} Qxd5 {aiming for ...Bxf2+!} 7. Bc4 Qd6 8. Nbd2 Bf5 9. b4 Bb6 10. Ng5 O-O $132 {[%mdl 2048] Black is not holding back} 11. Nde4 Nxe4 12. dxe4 Qxd1+ 13. Kxd1 Bg4+ 14. f3 Bd7 15. a4 h6 16. a5 {[#] Hoping for Nxf7.} hxg5 {[#]} 17. Bxg5 $146 ({Predecessor:} 17. axb6 axb6 18. Rxa8 Rxa8 19. Kc2 Kf8 20. Rd1 Be8 21. Bxg5 f6 22. Be3 Nd8 23. Kb2 {½-½ (34) Begliy,M (2422)-Panitevsky,I (2516) ICCF email 2018}) 17... Bxa5 18. bxa5 b6 19. Bd5 Rac8 20. axb6 cxb6 21. h4 Rfe8 22. Bxc6 Rxc6 23. Rxa7 Be6 24. Ra3 b5 25. Ke2 Rec8 26. Bd2 Rd8 {[#] White must now prevent ...Bc4+.} 27. Rha1 Kh7 {And now ...Bc4+ would win.} 28. Ra8 Bc4+ {The position is equal.} 29. Ke1 Rd3 30. R1a6 Rxa6 31. Rxa6 b4 32. Rc6 bxc3 33. Rxc4 Rxd2 34. g4 $1 Rh2 {Threatens to win with ...c2.} 35. Rxc3 Rxh4 {Accuracy: White = 96%, Black = 100%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.16"]
[Round "5.1"]
[White "Shankland, Sam"]
[Black "Anton Guijarro, David"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2683"]
[BlackElo "2697"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,96,0,0,0,17,19,0,20,20,32,21,-12,-20,-59,-31,-57,104,79,81,77,95,95,114,114,119,124,175,168,191,198,183,82,112,94,116,128,131,119,133,127,123,114,95,122,144,106,101,100,191,83,96,80,109,81,79,63,97,91,139,113,123,88,72,89,81,95,92,98,97,91,208,216,206,200,216,123,123,123,123,123,123,123,123,47,44,8,8,0,0]} 1. d4 Nf6 2. Bf4 c5 3. dxc5 Na6 4. f3 e6 5. e4 Bxc5 6. Nc3 {A45: Trompowsky Attack.} d5 7. Qd2 O-O 8. O-O-O {[#]} Bd7 $146 ({Predecessor:} 8... Nc7 9. g4 b5 10. h4 Qe7 11. e5 Nd7 12. Nh3 Nb6 13. Bg5 f6 14. exf6 gxf6 {1-0 (30) Dhulipalla,B (2313)-Lalith,B (2542) New Delhi 2018}) 9. Bxa6 bxa6 10. e5 Ne8 $1 {[#]} 11. Nxd5 $1 {[%mdl 512]} exd5 12. Qxd5 {[%mdl 64] Double Attack} Qb6 $2 (12... Qa5 $1 $15 {stays ahead.} 13. Qxa8 Nd6) 13. Qxd7 Nc7 14. Ne2 Ne6 15. Kb1 $1 Ba3 {[%csl Ga3][%cal Rb6b2] [#]} 16. b3 $1 Qf2 {Hoping for ...Rad8.} 17. Qd3 Rfd8 (17... Qxg2 $16 {might work better.} 18. Rhg1 (18. Qxa6 Rfd8 $16) 18... Qh3) 18. Qe4 $18 ({Don't do} 18. Qxa6 $6 Qxg2 19. Bg3 Bb4 $16) 18... Qxg2 19. Rdg1 Qf2 20. Rf1 (20. Bg3 $18 {has better winning chances.} Qb6 21. Bh4) 20... Qb6 21. Be3 Bc5 22. Bc1 Rac8 23. Rd1 Bf8 24. Bb2 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 25. Nc3 Qf2 26. Qe2 Qh4 27. Ne4 a4 28. Nd6 Rb8 (28... Rc7 $16) 29. Qe4 (29. f4 $18 {and White stays clearly on top.}) 29... Qxe4 30. Nxe4 a5 31. Nc3 axb3 32. cxb3 Rdc8 33. Rd5 Rb4 34. Rxa5 Rf4 35. Ne2 Rxf3 36. Nd4 Nxd4 37. Bxd4 h5 38. Rc1 $36 {[%mdl 2048] White is really pushing.} Re8 39. Rb5 Kh7 (39... Rd8 $16 40. Bc5 g5) 40. a4 Rd8 41. Bb6 Rdd3 {[#]} 42. a5 (42. Rc2 $1 $18) 42... Rxb3+ $16 43. Rxb3 Rxb3+ {KRB-KRB} 44. Kc2 Ra3 45. Kb2 {And now Ra1 would win.} Bb4 46. Ra1 (46. Rc7 $16) 46... Rh3 $1 $14 {...Bc3+ is the strong threat.} 47. Ra4 Rxh2+ 48. Kc1 Bxa5 {Accuracy: White = 61%, Black = 73%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.16"]
[Round "5.2"]
[White "Navara, David"]
[Black "Grandelius, Nils"]
[Result "1-0"]
[ECO "A33"]
[WhiteElo "2717"]
[BlackElo "2659"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,109,0,0,0,0,0,0,0,12,21,21,18,25,-5,-11,-21,-22,-26,-21,-21,-12,-12,-15,-20,0,0,-7,0,0,-3,0,-27,-29,-19,25,25,35,38,8,13,15,0,0,0,62,58,47,53,67,54,59,34,81,85,89,79,193,177,169,166,406,395,353,139,492,461,528,497,487,481,479,431,486,483,681,670,638,620,1731,1703,1676,1670,1543,1534,1201,1147,976,761,29978,29979,29978,29979,29971,29969]} 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 $1 10. Bd2 $1 {[%mdl 4] is recently more successful than 10.f4. A33: Symmetrical English: 2 Nf3 Nf6 3 d4 cxd4 4 Nxd4 e6 5 Nc3 Nc6.} a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 11. O-O-O $5 {[%mdl 4] Exploring less charted territory.} a4 12. Na1 {The position is equal.} O-O 13. Nc2 Bc5 14. f4 Nc6 $1 {[#]} 15. e5 $146 ({Predecessor:} 15. Be3 Qa5 16. Bxc5 Qxc5 17. Qd2 a3 18. Nxa3 Rxa3 19. bxa3 Qxa3+ 20. Kb1 e5 21. Bd3 {1-0 (53) Gelfand,B (2684)-Tregubov,P (2588) Moscow 2019}) 15... dxe5 16. fxe5 Nd7 17. Bf4 f6 18. exf6 Nxf6 19. Bh3 e5 20. Bxc8 exf4 21. Be6+ Kh8 {White must now prevent ...f3!} 22. gxf4 Nd4 23. Nxd4 Bxd4 24. Rd3 a3 25. b3 Nh5 26. Qxh5 Bxc3 27. f5 Bb2+ $1 ({Worse is} 27... Qf2 28. Qxh7+ $1 {[%mdl 512]} Kxh7 29. Rh3+ Qh4 30. Rxh4#) 28. Kb1 {Threatening mate with Qxh7+!} h6 29. Rhd1 $40 {[%mdl 128] White attacks.} Bf6 {aiming for ...Qf2.} 30. Qe2 Qa5 (30... Qc7 $11) 31. Qe1 $14 Qc7 32. Qg3 Be5 33. Qe3 Bf6 34. R1d2 Rfe8 ({Don't go for} 34... Bg5 $2 35. Qxg5 $1 {[%mdl 512]} Rae8 36. Qg3 $18) 35. Rd7 Qc6 36. R2d5 Rac8 (36... Re7 $16) 37. Rf7 {Hoping for Rxf6.} Bb2 {[#]} 38. Qd2 $1 Rb8 $2 (38... Rf8 39. Rfd7 Qb6) 39. Bd7 $18 {[%mdl 64] Double Attack} Qb6 {Threatens to win with ...Qg1+.} 40. c5 $2 (40. Bxe8 $18 {and the rest is easy. White threatens Rf8+ and mate.} Rxe8 41. Rd6 Qg1+ 42. Kc2) 40... Qd8 $2 {[%mdl 8192]} (40... Qa6 $16 {is more resistant.} 41. Bxe8 Rxe8) 41. f6 Bxf6 42. Bb5 ({Not} 42. Bxe8 Qxe8 43. Rxf6 Qe4+ 44. Qd3 Qe1+ 45. Kc2 gxf6 $16) 42... Re1+ 43. Kc2 Qg8 44. Rxf6 $1 gxf6 {[#]} 45. Rd7 $1 Qg6+ (45... Qf8 $142) 46. Bd3 Re4 {[#]} 47. Re7 $1 {[%mdl 576] Pin} f5 (47... Rxe7 48. Bxg6) 48. Bxe4 fxe4 {[%mdl 4096] Endgame KQR-KQR} 49. Qd4+ Kg8 50. Qd5+ Kf8 51. Re6 Qg5 52. Re5 Qg6 53. Rf5+ {White mates.} Kg7 54. Qe5+ {[%mdl 64] Double Attack} Kh7 55. Qc7+ {Accuracy: White = 85%, Black = 60%.} 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.16"]
[Round "5.3"]
[White "Vitiugov, Nikita"]
[Black "Harikrishna, Pentala"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2731"]
[BlackElo "2713"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,118,0,7,7,7,7,7,7,15,17,4,0,0,0,100,106,93,113,131,117,116,43,58,60,69,49,53,54,60,6,111,44,94,93,94,92,89,49,58,55,51,8,8,6,0,0,0,0,0,0,0,0,16,16,24,0,0,0,0,0,0,0,0,0,0,-6,0,0,0,0,0,0,0,0,0,-16,-16,-16,-16,-41,-41,-41,-41,-41,-41,-60,-60,-60,-41,-41,-41,-41,-41,-41,-41,-41,-41,-41,-41,-41,-16,-16,-8,-8,-8,-8,-14,-29,-29,-36,-36]} 1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. Nbd2 cxd4 6. exd4 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Bf5 7. Bb5 Qb6 8. c4 {The position is equal.} dxc4 9. a4 e6 10. O-O Bd3 11. Ne5 $36 {[%mdl 2048] [#] White has the initiative.} a6 $146 (11... Qxd4 $6 12. Ndxc4 (12. Nxc6 Qxf4 13. g3 Qd6 $11) 12... Qxf4 13. Qxd3 $16) (11... Bxf1 $11 12. Qxf1 Qxd4) ({Predecessor:} 11... Bxf1 12. Qxf1 Rc8 13. Ndxc4 Qxd4 14. Be3 Qd8 15. Bxa7 Nd5 16. a5 Bd6 17. a6 O-O 18. axb7 Nxa7 19. Rxa7 Rxc4 20. Nxc4 Bxh2+ 21. Kxh2 {½-½ (52) Perez Ponsa,F (2559)-Saric,I (2655) chess.com INT 2020}) 12. Ndxc4 $16 Bxc4 13. Nxc4 Qd8 14. Bxc6+ $1 bxc6 15. Ne5 (15. a5 $16) 15... Qd5 16. Rc1 Bd6 17. Re1 Rc8 18. Qe2 O-O 19. Qxa6 ({White should play} 19. Bg5 $14) 19... Ra8 (19... Qxd4 $11 20. Bg3 Ra8 21. Qxc6 Bxe5 22. Bxe5 Qxa4) 20. Qxc6 (20. Qc4 $16) 20... Qxc6 21. Rxc6 Bxe5 22. Bxe5 {Ra1 is the strong threat.} ({Much worse is} 22. Rxe5 $6 Rxa4 23. g3 Rxd4 $11) 22... Rxa4 23. Bd6 Rfa8 24. b4 h5 25. b5 R8a5 26. b6 Rb5 27. Rc8+ Kh7 28. Bc5 Ra2 29. Rc7 Kg6 30. Ra7 Rab2 (30... Re2 {is interesting.} 31. Rc1 Reb2 32. h3 Nd5 33. Rca1 Nxb6 34. R1a3 Nc4) 31. h3 Nd5 32. Ra3 R2b3 33. Rea1 {Threatening Rxb3.} Nxb6 (33... Rxa3 {seems wilder.} 34. Rxa3 Nxb6 35. Bxb6 Rxb6 36. h4 Rb4) 34. Rxb3 Rxb3 35. Bxb6 Rxb6 $11 {[%mdl 4096] Endgame KR-KR} 36. h4 Rb4 37. Rd1 Kf5 38. d5 e5 39. d6 {[#] And now d7 would win.} Rb8 $1 40. d7 Rd8 41. Rd6 f6 42. f3 Kg6 43. Kf2 Kf7 44. f4 exf4 45. Kf3 Ke7 46. Ra6 Rxd7 {aiming for ...g5.} 47. Kxf4 Rd4+ 48. Kg3 $1 g6 49. Kh3 Rd6 50. Ra3 Ke6 51. Kg3 Ke5 52. Kf3 Rd5 53. g3 Kf5 54. Rb3 g5 55. hxg5 fxg5 {[#]} 56. g4+ $1 {[%mdl 512]} hxg4+ 57. Kg3 Rd4 58. Rb5+ Kg6 59. Rb8 Ra4 {Accuracy: White = 84%, Black = 89%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.16"]
[Round "5.4"]
[White "Duda, Jan-Krzysztof"]
[Black "Ragger, Markus"]
[Result "1/2-1/2"]
[ECO "C68"]
[WhiteElo "2755"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,60,-7,-7,-10,-9,-8,-6,-10,0,-20,0,-17,-17,-17,-11,-23,0,0,0,0,0,0,0,0,-5,-11,0,0,0,0,0,-9,-10,-15,-16,-16,-11,-10,-8,-17,0,-28,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 f6 6. d4 exd4 7. Qxd4 Qxd4 8. Nxd4 Bd7 9. Be3 O-O-O 10. O-O-O Ne7 11. h4 {C68: Ruy Lopez: Exchange Variation, sidelines.} h5 12. Nde2 Ng6 13. f3 {The position is equal.} Bd6 14. Na4 Be6 15. Nc5 Bf7 16. Nd3 b6 {[#]} 17. b3 $146 ({Predecessor:} 17. Nd4 Ne7 18. Ne2 c5 19. Bf4 Bxa2 20. Bxd6 Rxd6 21. e5 fxe5 22. Nc3 Be6 23. Nxe5 Rxd1+ 24. Nxd1 {0-1 (47) Stojanovski,D (2436)-Mista,A (2582) Kragujevac 2013}) 17... Ba3+ 18. Kb1 c5 19. Bc1 Bxc1 20. Kxc1 c4 21. Ndf4 Rxd1+ 22. Kxd1 cxb3 23. cxb3 Ne5 24. Kc2 Rd8 25. Rd1 Rxd1 26. Kxd1 Kd7 27. Kd2 Kd6 28. Nd4 {[#] Nf5+ is the strong threat.} g6 29. Kc3 c6 30. a3 a5 {Accuracy: White = 95%, Black = 95%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.16"]
[Round "5.5"]
[White "Vidit, Santosh Gujrathi"]
[Black "Firouzja, Alireza"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "2721"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,47,22,24,12,47,33,87,83,76,68,310,304,309,309,302,303,289,297,299,301,437,371,361,366,363,368,369,360,363,366,485,489,488,470]} 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 a6 7. Rc1 Bf5 8. e3 e6 9. Be2 {D13: Slav Defence: Exchange variation without ...Bf5.} Qb6 10. O-O Qxb2 ({Black should try} 10... Be7 $14) 11. Na4 $16 {White is better.} Qb4 {[#]} 12. a3 $146 ({Predecessor:} 12. Nh4 Be4 13. f3 Bg6 14. Nxg6 hxg6 15. Rb1 Qa3 16. Rxb7 Na5 17. Rc7 g5 18. Rc3 Qxa2 {0-1 (46) Meier,G (2560)-Gurevich,M (2611) Evry 2008}) 12... Qa5 $2 (12... Qxa3 $14 13. Nb6 Rd8) 13. Qb3 $18 b5 14. Rxc6 Qxa4 {[#]} 15. Qc3 $1 {Rc8+ would kill now.} e5 16. Nxe5 (16. Bxe5 Qxa3 17. Qxa3 Bxa3 $16) 16... b4 17. axb4 Ne4 (17... Bxb4 {keeps fighting.} 18. Qb2 Qa3 19. Qxa3 Bxa3) 18. Qa1 Qxa1 19. Rxa1 {[#] aiming for Bb5!} Bxb4 20. Rcxa6 ({Weaker is} 20. Raxa6 O-O $16) 20... Rxa6 21. Rxa6 O-O 22. Nc6 Rc8 23. g4 ({Don't take} 23. Nxb4 Rc1+ 24. Bf1 g5 $18) 23... Nc3 24. Bf1 {Accuracy: White = 100%, Black = 44%.} ({Less strong is} 24. gxf5 Nxe2+ 25. Kg2 Nxf4+ 26. exf4 Bf8 $16) 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.18"]
[Round "6.1"]
[White "Harikrishna, Pentala"]
[Black "Anton Guijarro, David"]
[Result "1/2-1/2"]
[ECO "E01"]
[WhiteElo "2713"]
[BlackElo "2697"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,60,10,1,8,0,0,3,27,11,19,2,0,0,0,0,15,0,12,0,6,13,17,14,11,14,16,16,16,8,8,4,12,12,18,19,39,15,19,13,12,0,0,0,0,0,0,0,0,-46,-37,-40,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Bb4+ 5. Nd2 O-O 6. Ngf3 dxc4 {E01: Catalan: Early deviations.} 7. a3 Bxd2+ 8. Bxd2 Nc6 {The position is equal.} 9. e3 b5 10. b3 Bb7 11. bxc4 bxc4 12. O-O Ne7 13. Qc2 {[#]} c5 $146 ({Predecessor:} 13... a5 14. Rfe1 c5 15. dxc5 Rc8 16. Bc3 Be4 17. Qb2 Rxc5 18. Bxf6 gxf6 19. Qxf6 Ng6 20. Qxd8 Rxd8 {1-0 (56) Yankelevich,L (2420)-Arnold,M (2260) Riga 2018}) 14. Qxc4 cxd4 15. Qxd4 Qxd4 16. Nxd4 Bxg2 17. Kxg2 Rfc8 18. Rfc1 h6 19. Nb5 Ne4 20. Be1 a6 21. Nc7 Ra7 22. Ba5 Rb8 23. Ra2 Rb3 24. Rc4 Nd6 25. Rb4 Rxb4 26. axb4 Nc4 27. Rc2 Nxa5 28. bxa5 Kf8 29. f4 Nf5 30. Rc6 $1 Ke7 {Accuracy: White = 94%, Black = 94%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.18"]
[Round "6.2"]
[White "Ragger, Markus"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "C55"]
[WhiteElo "2670"]
[BlackElo "2683"]
[Annotator "TA"]
[PlyCount "152"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,152,35,26,33,14,25,25,42,29,27,30,18,16,35,29,16,0,6,0,0,0,0,-26,-25,-25,-23,-55,-49,-36,-48,-54,-42,-39,-32,-52,-49,-100,-93,-120,-75,-152,-87,-81,-93,-93,-91,-106,-91,-110,-120,-120,-75,-83,-77,-77,-50,-178,-163,-168,-157,-155,-128,-131,-136,-184,-187,-177,-180,-183,-182,-151,-163,-153,-63,-70,-70,-74,-27,-83,-83,-83,-83,-83,-80,-83,-83,-83,-80,-80,-79,-120,-122,-102,-77,-152,-162,-157,-156,-188,-188,-188,-188,-188,-188,-194,-186,-185,-206,-325,-316,-284,-306,-290,-284,-270,-222,-161,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. c3 d6 6. O-O g5 $1 {[%mdl 4] is more profitable than 6...g6 at the moment. C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} 7. Bb3 Bg7 8. Nbd2 {[#]} a5 $146 {White has an edge.} ({Predecessor:} 8... a6 9. Nc4 Be6 10. Re1 g4 11. Nfd2 Qd7 12. a4 h5 13. a5 h4 14. Nf1 O-O-O {1-0 (28) Amin,B (2707)-Cheparinov,I (2666) Changsha 2019}) 9. a4 Qe7 10. Nc4 Be6 11. Ne3 Qd7 12. Re1 d5 13. exd5 Nxd5 14. Nxd5 Bxd5 15. Nxe5 Bxe5 16. d4 {[%mdl 64] Pin} O-O-O 17. dxe5 Qe6 18. Bxd5 Rxd5 {[%mdl 64] Double Attack} 19. Qc2 Nxe5 20. Be3 Qg4 {And now ...Nf3+ would win.} 21. Red1 Nf3+ $40 {[%mdl 128] Black has some attack.} 22. Kh1 Nh4 $1 {[%csl Gh4][%cal Rg4g2]} 23. Rg1 ({Better is} 23. f3 $15 Rxd1+ 24. Rxd1 Nxf3 25. Rf1) 23... Rhd8 $17 24. h3 Qd7 25. Rge1 (25. Qe2 $142) 25... Rd3 (25... f5 $142 $1 26. f4 Rd3) 26. Qe2 {[#]} Qd5 $1 {[%csl Gh4][%cal Rd5g2][%mdl 512]} 27. Qf1 h5 28. c4 Qc6 $1 29. Kg1 f6 30. f3 Nf5 31. Bf2 h4 32. Qe2 Rd2 (32... Qxc4 33. Rac1 $11) 33. Qe4 ({White has to play} 33. Qe6+ $15 Qxe6 34. Rxe6) 33... Qxe4 $19 34. fxe4 Nd4 {Hoping for ...Nc2.} 35. Rab1 Ne2+ 36. Kf1 Nf4 37. Be3 Rc2 38. Bxf4 gxf4 {[%mdl 4096] Endgame KRR-KRR} 39. Re2 Rxc4 40. b3 Rb4 41. e5 f5 (41... fxe5 $17 42. Rxe5 b6) 42. e6 $1 $15 Re4 43. Rc1 Re8 44. Rec2 (44. Rc5 $1 $11 {remains equal.}) 44... Re7 $17 ({Much weaker is} 44... R4xe6 $6 45. Rxc7+ Kb8 46. R7c5 $11) 45. Rc5 b6 ({But not} 45... R4xe6 $6 46. Rxa5 Rf7 47. Ra8+ Kd7 48. Rh8 $11) ({Much worse is} 45... R7xe6 $6 46. Rxc7+ Kb8 47. Rc8+ Ka7 48. Rh8 $11) 46. Rxf5 R7xe6 47. Rf7 Re7 48. Rxe7 Rxe7 {KR-KR} 49. Rc4 Rf7 50. Kf2 c5 51. Re4 Kc7 52. Re6 ({White should play} 52. Re5) 52... Rd7 $1 53. Rh6 Rd2+ 54. Kf1 {[#]} f3 $1 {[%mdl 512]} 55. gxf3 Rd4 56. Rh7+ Kc6 57. Rh6+ Kb7 $1 58. Rh7+ {[#]} Ka6 $1 59. Kf2 {[#]} (59. Rg7 {was the only chance.}) 59... c4 $1 $19 {[%cal Rc4b3]} 60. bxc4 Rxc4 61. Ke3 Rxa4 62. f4 Ra3+ 63. Ke2 Rxh3 $2 (63... Ra2+ $19 64. Ke3 Ra3+ 65. Ke4 a4) 64. f5 $11 {The position is equal.} Rc3 {aiming for ...Rc5.} 65. Rxh4 Rc6 {Strongly threatening ...Rf6.} 66. Kd3 Kb5 67. Rf4 $1 Rf6 68. Kd4 Rf8 69. f6 Kb4 70. Kd5+ Kb5 71. Kd4 Rf7 72. Rf1 Rd7+ 73. Kc3 Rc7+ 74. Kd3 Rf7 75. Kd4 a4 76. Kc3 Ka5 {Accuracy: White = 78%, Black = 87%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.18"]
[Round "6.3"]
[White "Grandelius, Nils"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2659"]
[BlackElo "2755"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,58,1,6,5,12,14,31,30,19,15,25,31,20,0,8,14,10,15,8,3,23,19,14,16,41,31,30,0,20,13,24,0,41,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Bxd7+ Bxd7 7. Nc3 e5 8. Qd3 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} Rc8 9. O-O h6 10. Nd2 $1 {[%mdl 4] White is slightly better. is currently scoring better than 10.a4.} Qc7 11. Rd1 Nf6 12. Nf1 Bg4 13. Re1 Be6 14. Ne3 Be7 15. Rd1 O-O 16. a4 {[%cal Ba2a4,Ba4a5][%mdl 32] [#]} Bc4 $146 ({Predecessor:} 16... Rfd8 17. a5 Bf8 18. Bd2 g6 19. Be1 Qc5 20. Na4 Qc6 21. Nb6 Nxe4 22. Nxc8 Rxc8 {1-0 (56) So,W (2767)-Ganguly,S (2658) Douglas 2019}) 17. Nxc4 Qxc4 18. a5 Qxd3 19. Rxd3 Rc4 20. f3 Rfc8 21. Kf1 Kf8 22. Bd2 Ne8 23. Nd5 Rxc2 {The position is equal.} 24. Bc3 $36 {[%mdl 2048] Threatens to win with Ne3. White has good play.} Bh4 25. Ne3 Rf2+ 26. Kg1 {[#] Black must now prevent Nf5.} Re2 27. Kf1 Rf2+ 28. Kg1 {Strongly threatening Nf5.} Re2 {Hoping for ...Bf2+.} 29. Kf1 Rf2+ {Accuracy: White = 90%, Black = 94%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.18"]
[Round "6.4"]
[White "Firouzja, Alireza"]
[Black "Navara, David"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2726"]
[BlackElo "2717"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,98,39,5,24,16,35,0,0,0,20,20,16,6,17,14,18,0,7,22,6,0,4,-9,-8,-33,-16,-18,-4,-10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 h6 7. Nbd2 O-O 8. h3 a6 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 9. a4 Re8 {[#]} 10. Qb3 $146 ({Predecessor:} 10. Re1 Be6 11. b4 Ba7 12. Bxe6 Rxe6 13. Qc2 Qd7 14. Nc4 Ne7 15. Be3 Bxe3 16. Nxe3 {½-½ (49) Vovk,A (2607)-Lenic,L (2633) Hungary 2019}) 10... Be6 11. a5 b5 12. axb6 cxb6 13. Bxe6 Rxe6 14. Rd1 d5 15. exd5 Qxd5 16. Qxd5 Nxd5 17. Ne4 Bf8 18. g4 a5 19. h4 Rd8 20. g5 {The position is equal.} hxg5 21. hxg5 Nce7 22. Nh4 Ng6 23. Nxg6 Rxg6 24. Kf1 f5 25. gxf6 gxf6 26. Ng3 Bh6 27. Bxh6 Rxh6 28. d4 {[#] And now dxe5 would win.} Nf4 29. dxe5 Rxd1+ 30. Rxd1 {Rd6 is the strong threat.} fxe5 $11 {[%mdl 4096] Endgame KRN-KRN} 31. Ke1 Kf7 32. b3 Ke8 33. c4 Rg6 34. Kd2 Rd6+ 35. Kc2 Rxd1 36. Kxd1 {KN-KN} Kd7 37. Kd2 Kc6 38. Kc3 Ne6 39. Ne4 Nc5 40. Nxc5 Kxc5 {K3P-K3P} 41. f3 $1 b5 42. cxb5 Kxb5 {KPP-KPP} 43. Kc2 Kb4 44. Kb2 a4 45. bxa4 Kxa4 46. Kc3 {[#] White threatens Kc4 and mate.} Kb5 47. f4 Kc5 48. fxe5 Kd5 49. e6 Kxe6 {Accuracy: White = 94%, Black = 100%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.18"]
[Round "6.5"]
[White "Vitiugov, Nikita"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2731"]
[BlackElo "2721"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,78,22,29,29,32,26,20,27,24,29,20,24,25,25,48,44,37,49,46,34,42,23,51,20,28,21,19,22,50,61,56,29,20,17,24,18,21,29,32,31,30,27,23,19,17,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,3,8,8,0,0,0,23,0,0,0,0]} 1. d4 Nf6 2. Bf4 e6 3. e3 c5 4. Nf3 cxd4 5. exd4 b6 6. h3 {A46: 1 d4 Nf6 2 Nf3 e6: Torre, London and Colle Systems.} Be7 7. a4 O-O 8. Nbd2 d6 9. Bb5 Ba6 10. O-O {[#]} Bxb5 $146 ({Predecessor:} 10... Bb7 11. Re1 a6 12. Bd3 Nbd7 13. c3 Re8 14. Bh2 Nf8 15. Nc4 Nd5 16. Nfd2 b5 17. axb5 axb5 18. Rxa8 Bxa8 {0-1 (37) Van den Doel,E (2607)-Kryakvin,D (2595) Hoogeveen 2018}) 11. axb5 Nd5 12. Bg3 Nc7 13. c4 a6 14. bxa6 Rxa6 15. Qb3 Qd7 16. Rxa6 Nbxa6 17. Ra1 Rb8 18. Ne4 h6 19. Nc3 Bf8 20. Qa4 Qxa4 21. Rxa4 Rb7 22. b4 Nb8 23. b5 Nd7 24. Kf1 f5 25. h4 Be7 26. Bf4 Kf7 27. Na2 e5 28. dxe5 Nc5 29. Ra3 d5 30. cxd5 $1 Nxd5 31. Bd2 Ne4 32. Rd3 Ra7 33. Nc1 Nc7 34. Be3 Ra1 35. g3 Nc5 36. Rd1 Nxb5 37. Re1 Ke6 38. Ne2 Rxe1+ 39. Kxe1 g5 {Accuracy: White = 96%, Black = 93%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.19"]
[Round "7.1"]
[White "Shankland, Sam"]
[Black "Grandelius, Nils"]
[Result "1-0"]
[ECO "D86"]
[WhiteElo "2683"]
[BlackElo "2659"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,89,29,26,6,0,0,0,0,0,0,0,0,0,0,-12,-6,-19,-19,-11,-21,-5,0,0,0,-38,65,62,59,0,0,0,0,0,0,0,0,-14,54,61,74,71,106,0,0,0,83,97,826,854,791,770,1000,974,887,835,825,816,812,783,871,854,29982,29982,29984,29985,29985,29986,29986,29987]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Na5 11. Bd3 b6 12. Rc1 e5 {[%cal Re5d4] D87: Exchange Grünfeld: Classical Line: Variations without ...cxd4.} 13. dxe5 Bxe5 14. f4 Bg7 {The position is equal.} 15. Ng3 Bg4 16. Qc2 Qd7 {[#]} 17. Rf2 $146 ({Predecessor:} 17. e5 Rad8 18. Ba6 Qc6 19. Rb1 Bd7 20. a4 Qe6 21. Rf2 Bc6 22. Re1 Rfe8 23. Bb5 Bxb5 24. axb5 {½-½ (46) Soberano,J (2599)-Weber,J (2594) ICCF email 2009}) 17... Rfd8 18. Bf1 Be6 19. f5 Bc4 20. Bg5 f6 {Hoping for ...Bxf1.} 21. Bf4 Bd3 22. Qd1 {Threatens to win with Bxd3.} Bxf1 23. Qxf1 Qd3 (23... g5 $15 24. Bd2 b5) 24. Qe1 $1 $14 g5 {[#]} 25. Rd2 ({Better is} 25. Bxg5 $1 $14 {[%mdl 512]} fxg5 26. f6) 25... Qc4 $11 26. Bd6 {White wants to play e5.} Qf7 $36 {[%mdl 2048] And now ...Nc4 would win. Black has some pressure.} 27. e5 fxe5 28. Qe4 Nc4 {[%mdl 64] Double Attack} 29. Rd5 b5 (29... Bf8 $1 $11 30. Qxc4 Rxd6) 30. Rcd1 $14 Nb2 31. Rf1 $1 {aiming for f6.} Bf6 {[#]} 32. Rxc5 (32. Qf3 $1 $16) 32... Nc4 $11 33. Rd1 Be7 ({But not} 33... Nxd6 {[#]} 34. Rxd6 $1 {[%mdl 512]} Rxd6 35. Qxa8+ Rd8 36. Qc6 $16) (33... a6 $11 {remains equal.}) 34. Rc7 $16 {f6 is the strong threat.} Bxd6 $4 {[%mdl 8192]} (34... Nxd6 $16 35. Rxd6 Rxd6 36. Qxa8+ {[%mdl 64] Double Attack} Rd8) 35. Rxf7 $18 {Black must now prevent Qb7!} Bc5+ 36. Rd4 $1 {Threatening mate with Qb7!} Bxd4+ 37. cxd4 {White wants to mate with Qb7!} Nd6 38. Qe2 Nxf7 39. dxe5 {[%cal Bd4e5,Be5e6,Be6e7][%mdl 32]} Rac8 40. e6 Rc1+ 41. Kf2 Nh6 42. e7 {White mates.} Re8 43. Qe6+ Nf7 44. Nh5 Rc2+ 45. Ke3 {Accuracy: White = 88%, Black = 66%.} 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.19"]
[Round "7.2"]
[White "Anton Guijarro, David"]
[Black "Ragger, Markus"]
[Result "1/2-1/2"]
[ECO "A50"]
[WhiteElo "2697"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,85,24,27,13,14,16,26,35,29,23,41,21,51,20,21,5,29,0,3,-110,-94,-111,0,0,35,0,0,0,58,45,87,89,93,56,70,58,200,194,218,215,190,184,218,208,214,205,228,220,217,216,403,266,316,106,115,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. f3 c5 4. d5 d6 5. e4 Bg7 6. Nc3 e6 7. Bg5 exd5 8. cxd5 h6 9. Be3 O-O 10. Qd2 Re8 11. Be2 Kh7 {[#]} 12. Rc1 $146 {A65: Modern Benoni: 6 e4.} ({Predecessor:} 12. g4 a6 13. a4 Nbd7 14. Nh3 Ne5 15. O-O Rb8 16. Kg2 Bd7 17. a5 Qe7 18. Nf2 b5 19. axb6 Rxb6 20. Rxa6 {1-0 (51) Flear,G (2445)-Konguvel,P (2343) Saint Affrique 2019}) 12... Qe7 13. b3 (13. Nd1 {seems wilder.} a6 14. b4 Nbd7 15. a3 a5 16. Nh3) 13... Na6 14. Bxa6 {White has an edge.} bxa6 15. Nge2 Nd7 16. O-O Nb6 17. Ng3 a5 18. Bf2 Bd7 19. Nce2 h5 20. Qxa5 (20. Be3 $11 {remains equal.}) 20... h4 $17 21. Nh1 Qg5 ({Black should play} 21... f5 $1 $17 {[%cal Rf5e4]} 22. Nc3 Qg5) 22. Be1 $11 h3 {[%csl Gh3][%cal Rg5g2]} 23. Nhg3 Bd4+ 24. Bf2 hxg2 ({Black should try} 24... Bg7 $11) 25. Kxg2 $14 Bxf2 26. Rxf2 f5 27. h4 $36 {[%mdl 2048] Black is under pressure.} Qh6 28. Rh1 f4 (28... Rf8 $14) 29. Nf1 $18 Re5 {[#]} 30. Kg1 $1 Rh5 {intending ...g5.} 31. Rfh2 Kg8 32. Kf2 Kh7 33. Ke1 Re5 34. Nd2 Qg7 35. Rg1 Rae8 $2 (35... Re7 {is a better defense.} 36. Qc3 (36. Nxf4 $2 Qe5 $19) 36... Qxc3 37. Nxc3 Kh6) 36. Rg5 Nxd5 37. Rxe5 $2 (37. exd5 $2 Re3 $19) (37. Qxa7 R5e7 $11) (37. Nc4 $18 Nb4 38. Nxe5 Rxe5 39. a3 (39. Qxa7 Re7 $11) (39. Nxf4 Qf6 $14) 39... Nd3+ 40. Kd2) 37... Ne3 $16 {[#]} 38. Rxe8 ({Don't blunder} 38. Nxf4 $2 Qxe5 39. Qc7 Re7 $19) ({Don't play} 38. Qxa7 $6 Rxe5 39. Kf2 (39. Nxf4 Re7 $15) 39... Nd1+ 40. Kg1 Ne3 $11) (38. Rxc5 $1 $16 dxc5 39. Qc3 (39. Qxc5 Rc8 $11) (39. Nxf4 Qe5 $17) (39. Qxa7 Qa1+ 40. Kf2 Nd1+ 41. Kg2 Ne3+ 42. Kf2 Nd1+ 43. Kg2 Ne3+ 44. Kf2 $11)) 38... Qa1+ $1 $11 {The position is equal.} 39. Kf2 Nd1+ 40. Kg2 {Strongly threatening Re7+.} Ne3+ 41. Kf2 Nd1+ 42. Kg2 Ne3+ 43. Kf2 {Accuracy: White = 63%, Black = 58%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.19"]
[Round "7.3"]
[White "Navara, David"]
[Black "Vitiugov, Nikita"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2717"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,83,0,0,10,0,-14,-14,-17,0,-22,0,0,0,0,0,0,0,-11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-7,0,0,1,0,7,25,8,11,12,10,8,37,22,14,13,13,24,35,20,10,0,0,0,23,17,10,7,7,7,26,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 e5 2. g3 c6 3. d4 e4 4. a3 d5 5. Nc3 Nf6 6. Bg2 {A20: English Opening: 1...e5.} Be7 7. f3 exf3 8. Nxf3 O-O 9. O-O h6 10. cxd5 cxd5 {[#]} 11. Nh4 $146 ({Predecessor:} 11. Bf4 Nc6 12. Rc1 Be6 13. Kh1 Rc8 14. Qd3 Re8 15. Qb5 b6 16. Qd3 Bf8 17. Ne5 {½-½ (33) Grigoriants,S (2543)-Brkic,A (2587) Hungary 2019}) 11... Nc6 12. Nf5 Be6 13. g4 Re8 14. Nxe7+ Nxe7 15. g5 hxg5 16. Bxg5 {[#] And now Rxf6 would win.} Nh7 $1 {[%cal Rh7g5]} 17. Bh4 Qd7 18. e3 Nf5 {[%cal Be7f5,Bf5h6,Bh6g4][%mdl 32]} 19. Qe1 Nf8 20. Rd1 Ng6 21. Bg3 Nh6 22. e4 dxe4 23. Qxe4 Re7 24. Nd5 Bxd5 25. Qxd5 Qxd5 26. Bxd5 Ng4 (26... Rd8 $5 {[%cal Rd8d5]} 27. Ba2 Re2 $14) 27. Rd3 Rd8 28. Bb3 Nf6 29. d5 Re2 30. d6 Ne5 31. Rc3 Nc6 $1 32. Rd3 Ne5 33. Bd1 Re4 34. Rc3 Nc4 35. Bf3 Nd2 $1 {[%cal Rd2f1]} 36. Bxe4 Nfxe4 {The position is equal.} 37. Rc7 Nxf1 38. d7 Kf8 $1 ({Much worse is} 38... Nfxg3 $6 39. Rc8 $16) 39. Kxf1 Nxg3+ 40. hxg3 Ke7 41. Rxb7 Rxd7 42. Rb5 {Accuracy: White = 96%, Black = 97%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.19"]
[Round "7.4"]
[White "Duda, Jan-Krzysztof"]
[Black "Firouzja, Alireza"]
[Result "0-1"]
[ECO "A11"]
[WhiteElo "2755"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,78,4,10,-29,-22,-34,-23,-100,-98,-115,-114,-125,-87,-104,-113,-112,-117,-125,-81,-120,-123,-106,-65,-65,-69,-98,-52,-93,-60,-89,-91,-115,-127,-121,-119,-136,-65,-189,-124,-148,-166,-150,-152,-173,-178,-195,-168,-166,-140,-244,-280,-264,-233,-245,-270,-233,-244,-798,-792,-755,-726,-1071,-1045,-29979,-29982,-29982,-29983,-29980,-29980]} 1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 e6 5. b3 Bd6 6. Bb2 O-O 7. Qc2 {A11: English Opening: 1...c6.} e5 8. Be2 e4 9. Ng5 {[#]} (9. Nd4 $11) 9... h6 $146 ({Predecessor:} 9... Bf5 10. f3 Bg6 11. fxe4 h6 12. Nf3 dxe4 13. Nh4 Bh7 14. O-O Ng4 15. Bxg4 Qxh4 {0-1 (28) Bosboom,M (2405)-Pijpers,A (2462) Belgium 2018}) 10. h4 {next cxd5 is good for White.} Re8 11. Nh3 Na6 12. a3 dxc4 13. Bxc4 b5 14. Be2 b4 15. Nd1 bxa3 16. Bxa3 Nb4 17. Bxb4 Bxb4 18. g3 Ng4 19. Ra2 Qf6 20. Kf1 Bf5 21. Kg2 Rad8 22. Nc3 a5 23. Nf4 Qe5 (23... Qe7 $17 24. h5 Rd6) 24. Rc1 (24. Nb1 $15) 24... Rd6 (24... g5 $19 25. Nh5 gxh4) 25. Qd1 Nf6 26. h5 Red8 $36 {[%mdl 2048] Strongly threatening ...Bxc3. Keeping White busy.} 27. Nb1 g5 28. hxg6 fxg6 (28... Bxg6 29. Rcc2 $11) 29. Qh1 Kg7 (29... Bxd2 $2 30. Rxd2 Rxd2 31. Nxd2 $18) 30. Na3 (30. Kg1 $17 {was necessary.}) 30... Bxa3 $1 $19 ({Inferior is} 30... Rxd2 31. Rxd2 Rxd2 32. Nc4 $16) 31. Rxa3 g5 $1 ({Don't take} 31... Rxd2 32. Rxc6 Bg4 33. Bxg4 $17) 32. Nh5+ Nxh5 33. Bxh5 Rxd2 {aiming for ...Qb2!} 34. Rxc6 $2 {[#]} (34. Ra4 Bg6 35. Rf1 (35. Rxc6 $2 Be8 $19 {[%mdl 64] Skewer})) 34... Bd7 $1 35. Rg6+ {[#]} Kh7 $1 {And now ...Rf8 would win.} 36. Qc1 Be8 37. Rxa5 Qxa5 {Black mates.} 38. Qc4 {[#]} Rxf2+ $1 {[%mdl 576] Decoy} 39. Kxf2 Qf5+ {[%mdl 64] Pin. Accuracy: White = 47%, Black = 69%.} 0-1

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.19"]
[Round "7.5"]
[White "Vidit, Santosh Gujrathi"]
[Black "Harikrishna, Pentala"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2721"]
[BlackElo "2713"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,57,22,20,17,20,39,39,12,21,23,42,29,19,70,13,21,19,11,16,10,21,22,18,15,15,11,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bf4 O-O 6. e3 b6 7. Bd3 dxc4 8. Bxc4 Bb7 9. O-O a6 {D37: Queen's Gambit Declined: 5 Bf4.} 10. Qe2 b5 11. Bd3 Nbd7 {White is slightly better.} 12. Rfd1 Rc8 13. Ne5 Qe8 14. Rac1 {[#]} Nxe5 $146 ({Black should play} 14... c5 $11) ({Predecessor:} 14... c5 15. Nxd7 Nxd7 16. Be4 Bxe4 17. Nxe4 Rc6 18. dxc5 e5 19. Bg3 Nxc5 20. Qc2 Rc8 21. Bxe5 Nxe4 22. Qxe4 Rxc1 23. Rxc1 {1-0 (35) Esen,B (2528)-Singer,C (2330) Lienz 2017}) 15. Bxe5 (15. dxe5 $14 Nd5 16. Nxd5 Bxd5 17. Bb1) 15... c5 $11 {The position is equal.} 16. Bxf6 Bxf6 17. dxc5 Rxc5 18. Ne4 Rxc1 19. Nxf6+ gxf6 20. Rxc1 f5 21. Rc7 Bd5 22. Qh5 Qd8 23. Bxf5 exf5 {[#]} 24. Rd7 $1 {[%cal Rd7d8][%mdl 512]} Qxd7 25. Qg5+ Kh8 26. Qf6+ {[%mdl 64] Double Attack} Kg8 27. Qg5+ Kh8 28. Qf6+ {[%mdl 64] [#] Double Attack} Kg8 29. Qg5+ {Accuracy: White = 93%, Black = 92%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.20"]
[Round "8.1"]
[White "Harikrishna, Pentala"]
[Black "Ragger, Markus"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2713"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,69,0,0,0,10,1,4,24,31,35,0,0,0,0,0,0,0,0,0,0,-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. a3 O-O 9. Nc3 Bg4 10. Be3 Nd4 {C84: Closed Ruy Lopez: Unusual White 6th moves.} 11. Bxd4 exd4 12. Nd5 Nxd5 13. Bxd5 Rc8 14. h3 Bd7 {The position is equal.} 15. Nxd4 c6 16. Bb3 Bf6 $1 {[%cal Rf6d4]} 17. c3 Bxd4 $1 18. cxd4 Qf6 {[#]} 19. e5 $146 ({Predecessor:} 19. Qd2) 19... dxe5 20. dxe5 Qxe5 21. d4 Qf6 22. Rc1 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 23. Re1 a4 24. Ba2 Rce8 25. Qd3 g6 26. Qc3 Rxe1+ 27. Rxe1 Re8 28. Rxe8+ Bxe8 29. Bb1 Bd7 30. Be4 h5 31. g3 Qe6 32. Bg2 Qe2 33. h4 Qd1+ 34. Kh2 Qe2 35. Kg1 {Accuracy: White = 95%, Black = 100%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.20"]
[Round "8.2"]
[White "Grandelius, Nils"]
[Black "Anton Guijarro, David"]
[Result "0-1"]
[ECO "B31"]
[WhiteElo "2659"]
[BlackElo "2697"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,134,10,7,25,0,0,0,0,0,4,0,0,0,0,0,0,0,0,11,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-80,-70,-43,11,0,0,-24,0,-96,-91,-106,-98,-121,-101,-113,-116,-162,-150,-172,-149,-167,-152,-159,-153,-154,-139,-196,-164,-152,-159,-199,-208,-264,-266,-301,-301,-306,-307,-321,-202,-211,-211,-213,-220,-221,-205,-220,-224,-450,-276,-302,-195,-529,-530,-508,-492,-566,-556,-639,-525,-568,-888,-891,-897,-1107,-1114,-1202,-1265,-1281,-1190,-901,-945,-1034,-832,-1115,-933,-2126,-1886,-1534,-1420,-1937,-1852,-29953,-29959,-29947,-29955,-5804,-5114,-29986,-29987]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Re1 O-O 7. d4 a6 {B31: Sicilian: 2...Nc6 3 Bb5 g6.} 8. Bd3 d5 9. e5 Ne4 {[#] The position is equal.} 10. Be3 $146 ({Predecessor:} 10. Nbd2 Nxd2 11. Bxd2 Bg4 12. Be3 cxd4 13. cxd4 f6 14. exf6 Bxf6 15. Be2 Qb6 16. Qd2 {0-1 (47) Khanin,S (2500)-Adhiban,B (2654) Moscow 2019}) 10... Qb6 11. Qc2 cxd4 12. cxd4 Bf5 13. Nc3 Nxc3 14. bxc3 Bxd3 15. Qxd3 Na5 16. h4 Qe6 17. Ng5 Qg4 18. f3 Qxh4 19. Re2 $1 {And now g3! would win.} Nc4 {[#]} 20. g3 $1 {[%cal Rg3h4][%mdl 512]} Qxg3+ 21. Rg2 Qh4 22. Rh2 Qg3+ 23. Kh1 {[#]} (23. Rg2 $11 Nxe5 24. Qe2 (24. Rxg3 $2 Nxd3 25. f4 Nb2 $19) (24. dxe5 Qxe5 25. Bd4 Qd6 $11) 24... Nxf3+ 25. Nxf3) 23... Nxe5 $1 $17 ({But not} 23... Nxe3 $6 24. Qxe3 h6 25. Rg1 $11) 24. dxe5 Qxe5 (24... h6 $15 25. Rg1 Qxe5) 25. Bd2 h6 $36 {[%mdl 2048] Black has the initiative.} 26. Nh3 e6 27. Re1 {[#]} (27. Rg1 $11) 27... Qf6 $1 28. Nf2 h5 29. Nh3 Rfc8 30. Ng5 Rc4 31. f4 Rac8 32. Nf3 Ra4 33. Qb1 b5 34. Ne5 Qf5 35. Qxf5 exf5 ({And not} 35... gxf5 36. Rg2 $11) 36. Rh3 d4 37. cxd4 Rxd4 38. Nf3 Rd3 39. Re7 Bc3 40. Bxc3 Rcxc3 ({Don't play} 40... Rdxc3 41. Ng5 $19) 41. Kg2 Rc2+ 42. Kg3 Rc4 43. Re2 b4 44. Rh1 a5 {[%cal Ba6a5,Ba5a4,Ba4a3][%mdl 32]} 45. Rf1 a4 46. Re8+ Kg7 47. Re7 $2 (47. Rf2) 47... b3 48. axb3 Rxb3 49. Re2 $2 (49. Ra7 {is tougher.}) 49... a3 $19 50. Rd2 Ra4 51. Ra2 f6 52. Rh1 Rc4 53. Rf1 {[#]} h4+ $1 {[%mdl 576] Decoy} 54. Kxh4 Rxf4+ 55. Kg3 g5 56. Kg2 Kg6 57. Nd2 Rg4+ 58. Kf2 Rb2 59. Rxb2 axb2 {[%mdl 4096] Endgame KRN-KR} 60. Rb1 Rb4 61. Nf3 f4 62. Ne1 Rb3 63. Ke2 g4 64. Nd3 f3+ 65. Kd2 g3 66. Kc2 Rb8 67. Nxb2 f2 {Accuracy: White = 60%, Black = 89%.} 0-1

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.20"]
[Round "8.3"]
[White "Firouzja, Alireza"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2726"]
[BlackElo "2683"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,114,22,22,25,13,9,24,15,24,15,9,21,29,12,25,30,30,36,38,25,86,21,46,47,36,41,32,26,20,12,12,11,26,32,44,55,47,55,53,43,43,57,49,0,0,0,21,29,23,20,29,34,39,39,40,34,54,55,62,62,62,62,60,62,55,20,28,35,35,2,2,2,3,3,6,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,16,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. O-O d6 6. c3 a6 7. a4 h6 8. Re1 $1 {The main line 8.Re1 scores better than 8.Nbd2. C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} O-O 9. h3 Re8 10. Nbd2 {White has an edge.} Be6 11. Bxe6 Rxe6 12. b4 Ba7 13. Bb2 {[#]} Nh7 $146 ({Predecessor:} 13... Qd7 14. Nf1 Rd8 15. Ng3 d5 16. Qc2 b5 17. axb5 axb5 18. Rad1 dxe4 19. dxe4 Rd6 20. Rxd6 cxd6 {½-½ (37) Karjakin,S (2754)-Harikrishna,P (2724) Jerusalem 2019}) 14. Nf1 Ne7 15. d4 Ng6 16. Ng3 Nh4 (16... c6 $11 {keeps the balance.}) 17. a5 (17. Nxh4 $16 Qxh4 18. Nf5) 17... Nxf3+ 18. Qxf3 ({And not} 18. gxf3 Qh4 $17) 18... g6 19. Rad1 Qh4 20. c4 Bxd4 21. Bxd4 exd4 22. Rxd4 Rae8 23. Qd3 f5 24. c5 {[%cal Rc5d6]} Qe7 25. cxd6 cxd6 26. Qd2 Kg7 27. Rd1 fxe4 28. Rxd6 (28. Ne2 {with more complications.} e3 29. fxe3 Rxe3 30. Nf4 Qe5 31. Rf1) 28... Rxd6 29. Qxd6 Qxd6 (29... Nf6 {is interesting.} 30. Nf1 Qxd6 31. Rxd6 Re5 32. Ne3 Rb5) 30. Rxd6 $14 {[%mdl 4096] Endgame And now Rd7+ would win. KRN-KRN} Nf6 31. Ne2 e3 32. fxe3 Rxe3 33. Nf4 {Black must now prevent Rxf6!} Re4 34. Nd3 Re7 35. Nc5 Kf7 36. Kf2 Ne4+ 37. Nxe4 Rxe4 {KR-KR} 38. Rb6 $1 {[%cal Rb6b7]} Re7 39. Kf3 Kg7 40. Kf4 h5 41. h4 Kh6 $1 {The position is equal.} 42. g3 Kg7 43. Rd6 Kh6 44. Rf6 Kh7 45. Rb6 Kg7 46. b5 axb5 47. Rxb5 Kh6 48. Kf3 Kg7 49. Rd5 Kh6 50. Rc5 Kg7 51. Kf4 Kh6 52. Rb5 Kg7 53. Re5 Rc7 54. Ke4 Rc3 55. Rg5 b6 {[%cal Bb7b6,Bb6b5][%mdl 32]} 56. Kd4 Rc6 $1 57. a6 {[#] Rb5 is the strong threat.} b5 $1 {Accuracy: White = 90%, Black = 97%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.20"]
[Round "8.4"]
[White "Vitiugov, Nikita"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2731"]
[BlackElo "2755"]
[Annotator "TA"]
[PlyCount "136"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,136,6,15,12,11,16,18,21,14,13,27,7,28,7,15,13,12,12,20,31,33,36,49,35,61,58,55,44,67,41,37,45,37,40,47,44,27,35,48,37,51,22,64,58,45,36,45,47,127,27,27,27,29,30,30,30,30,30,30,14,631,91,235,235,217,183,183,183,183,162,183,171,153,166,175,114,166,166,291,292,446,446,456,456,456,456,456,456,456,350,12818,12826,12830,456,12843,12843,12843,0,474,0,12843,12844,12844,456,456,456,456,379,379,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 Bf5 4. c4 e6 5. Nc3 Bd6 6. Bxd6 {D06: Queen's Gambit: Symmetrical and Baltic Defences.} Qxd6 7. e3 O-O 8. Qb3 b6 9. Rc1 c6 10. Be2 Nbd7 11. O-O h6 12. cxd5 exd5 13. Rfd1 {[#]} b5 $146 (13... a5 {is interesting.} 14. Bd3 Bg4 15. Qc2 Rfe8 16. Be2 Rab8) ({Predecessor:} 13... Rfd8 14. h3 a5 15. a3 Rab8 16. Qa2 Ne4 17. Bd3 Ndf6 18. Ne5 Rbc8 19. Ne2 Be6 {½-½ (44) Dorfman,J (2596)-Cuijpers,F (2450) Germany 2000}) 14. Bd3 Bxd3 15. Rxd3 Rfc8 16. Rd2 Nb6 17. Qd1 a5 18. Rdc2 a4 19. Nb1 Nc4 20. b3 axb3 21. axb3 Na5 22. Qd3 (22. Nbd2 {feels hotter.} Nb7 23. Ne1 b4 24. h3 Nd8 25. Nd3) 22... Ne4 23. Nbd2 Nxd2 24. Nxd2 Nb7 25. g3 Ra3 26. Qf5 Rc7 27. e4 dxe4 28. Nxe4 Qxd4 ({Black should play} 28... Qd7 $14 29. Qxd7 Rxd7) 29. Rxc6 (29. Rd2 $16 Qb4 30. Re1) 29... Rxc6 $11 30. Rxc6 {Rc7! is the strong threat.} Rxb3 31. Rc7 $1 {[%csl LRb7,LRf7]} Nd8 $1 32. Rd7 Qa1+ 33. Kg2 {[%cal Rd7d8]} Qa8 34. Kh3 $40 {[%mdl 128] White attacks.} Rb4 $2 {[%mdl 8192]} (34... b4 $11) 35. f3 $2 (35. Nd6 $18 {[%cal Rd6f7] and the rest is easy.} Rd4 36. Re7) 35... Ra4 (35... Rb3 $16 {is a better defense.}) 36. Re7 $1 $18 {[%cal Re7e8]} ({Inferior is} 36. Qxb5 Ra5 $11) 36... Qc6 {[#]} 37. Nd6 $1 {[%mdl 576] Deflection} Qxd6 38. Re8+ Qf8 39. Rxf8+ Kxf8 {[%mdl 4096] Endgame KQ-KRN} 40. Qc5+ Kg8 41. Qxb5 Rd4 42. Qe8+ $1 Kh7 43. f4 $1 g6 (43... Rd1 {was called for.} 44. Qa4 Rd2 45. Qe4+ Kg8 46. Qe8+ Kh7 47. Qe4+ Kh8 48. Qe8+ Kh7) 44. g4 $1 Rd3+ (44... Rd5 $142 45. f5 Kg7) 45. Kg2 Kg7 {[#]} 46. f5 $1 gxf5 47. gxf5 Rd6 {[#]} 48. Qe7 $1 Rd5 49. h4 ({Less strong is} 49. f6+ Kg6 $14) 49... Rxf5 $2 (49... h5 50. Qg5+ Kf8 51. Qxh5 f6) 50. Qxd8 {KQ-KR} Rf4 51. Qc8 (51. Kh3 $142 Re4 52. Qd3) 51... Re4 (51... h5 $142 52. Qc5 Rg4+ 53. Kh3 Kg6 54. Qc2+ Kg7) 52. Qc3+ Kg8 53. Qc8+ (53. Qg3+ $142 Kf8 54. Qa3+ Kg7 55. Qg3+ Kf8 56. Qa3+ Kg7 57. Qa1+ f6 58. h5) 53... Kg7 54. Qc3+ Kg8 $1 55. Qg3+ Kf8 56. Qd3 (56. Qa3+ $142 Kg7 57. Qa1+ Kg6 {[#]} 58. Qb1 $1 {[%mdl 512]}) 56... Rg4+ 57. Kf3 Rg6 58. h5 Rg5 59. Qh7 $2 (59. Qd6+ $18 Kg7 60. Qd4+ Kg8 61. Qh4) 59... Rxh5 $11 {The position is equal.} 60. Kf4 Ke7 61. Qg7 Rg5 62. Qxh6 (62. Qd4 {with more complications.}) 62... Rg6 63. Qh8 Rf6+ 64. Ke5 Re6+ 65. Kf5 Rg6 66. Qb8 Rf6+ 67. Ke5 {Threatening mate with Qc7+.} Re6+ 68. Kd5 Rg6 {Blacks defense is rewarded with a draw. Accuracy: White = 77%, Black = 67%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.20"]
[Round "8.5"]
[White "Vidit, Santosh Gujrathi"]
[Black "Navara, David"]
[Result "0-1"]
[ECO "E12"]
[WhiteElo "2721"]
[BlackElo "2717"]
[Annotator "TA"]
[PlyCount "128"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,128,5,12,11,18,15,25,18,29,12,49,44,49,31,51,42,87,90,87,75,155,163,187,183,158,145,278,288,324,305,297,239,219,85,76,85,124,115,119,117,161,120,407,402,474,477,466,462,478,467,465,444,438,433,556,567,527,64,64,64,74,67,85,29,56,30,29,21,21,18,18,19,43,0,19,0,8,0,0,0,8,8,8,8,8,12,15,0,0,0,0,0,0,0,8,0,0,0,0,0,0,-128,-122,-268,-291,-564,-552,-2197,-4598,-2674,-2171,-29968,-29968,-29980,-29980,-29985,-29986,-29986,-29987,-29987,-29988]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Bf4 d5 6. cxd5 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7 .} Nxd5 7. Bg3 Nd7 {[#]} 8. e4 $146 {White has an edge.} ({Predecessor:} 8. Nbd2 N5f6 9. e3 Bd6 10. Nc4 Qe7 11. Nxd6+ cxd6 12. Be2 O-O 13. O-O Ne4 14. Rc1 Nxg3 15. hxg3 {½-½ (74) Sakaev,K (2596)-Zhigalko,S (2571) Moscow 2019}) 8... N5f6 9. e5 Nh5 10. Nc3 Be7 11. Bc4 a6 12. d5 $36 {[%mdl 2048] White has some pressure.} exd5 13. Bxd5 Nxg3 14. hxg3 c6 (14... Nc5 $142) 15. Bxf7+ $1 $16 Kxf7 {[#]} 16. e6+ $1 {[%mdl 576] Decoy} Kxe6 17. Qe2+ Kf7 (17... Kd6 $16 {might work better.}) 18. O-O-O $1 $18 {And now Rxd7! would win.} Bf6 19. Ne4 $1 Qe7 ({But not} 19... Kf8 $6 20. Nxf6 gxf6 21. Qe6 $18) 20. Nd6+ {[%mdl 64] Double Attack} Kf8 21. Qxe7+ (21. Qc2 $1 $18 {and the rest is easy. aiming for Rhe1.} Qe6 22. Nxb7) 21... Bxe7 $16 22. Nxb7 Nf6 23. Ne5 {Strongly threatening Ng6+!} Nd5 24. Kb1 Rc8 25. Rhe1 Bxa3 $2 {[%mdl 8192]} (25... g5 $16 {was called for.} 26. Nxc6 {[%mdl 64] Remove Defender} Rxc6) 26. Nxc6 $18 ({Not} 26. bxa3 Nc3+ 27. Kc2 Nxd1 $18) 26... Bb4 27. Nxb4 Nxb4 28. Rd7 h5 29. Nd6 Ra8 30. Ree7 Rh7 31. Ne4 Rh6 32. Rxg7 {Intending Ng5 and mate.} Rd8 33. b3 $2 ({Less strong is} 33. Rxd8+ Kxg7 34. Kc1 Re6 $16) (33. Rdf7+ $18 Ke8 34. b3 Rd1+ 35. Kb2) 33... Rxd7 $14 34. Rxd7 {[%mdl 4096] Endgame KRN-KRN} a5 35. f3 Rc6 36. Rd2 (36. Rh7 $16) 36... Kf7 37. Kb2 Ke6 38. Nc3 Rd6 39. Re2+ Kf5 40. Ne4 Rd1 41. Nc3 Rd3 42. Nb1 Nd5 43. Kc2 Nb4+ 44. Kb2 Nd5 45. Na3 Ne3 46. Nc4 Nxc4+ 47. bxc4 $11 {KR-KR} a4 48. Kc2 Rb3 49. Rd2 Rb4 50. Kc3 Rb3+ 51. Kc2 {With the idea Rd5+.} Rb4 52. Kc3 Rb3+ 53. Kd4 a3 54. Ra2 Ke6 55. c5 (55. Ra1 $11 {keeps the balance.}) 55... b5 $1 $17 {[%cal Bb6b5,Bb5b4,Bb4b3,Bb3b2][%mdl 32] Threatens to win with ...b4.} 56. g4 {[#]} (56. Ra1 $17) 56... hxg4 $1 $19 57. fxg4 $2 {[#]} (57. Ra1 gxf3 58. gxf3) 57... b4 $1 58. g5 Rb2 59. Ra1 a2 60. g6 b3 {Black mates.} 61. c6 Rc2 62. Rf1 b2 63. g7 Rxg2 64. c7 Kd7 {Black used his chance. Accuracy: White = 64%, Black = 77%.} 0-1

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.21"]
[Round "9.1"]
[White "Navara, David"]
[Black "Harikrishna, Pentala"]
[Result "0-1"]
[ECO "D25"]
[WhiteElo "2717"]
[BlackElo "2713"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,98,23,56,42,40,14,32,16,18,17,29,0,0,8,18,14,7,20,36,-9,-14,-31,-29,-40,-39,-40,-40,-40,-40,-40,-39,-47,-36,-49,-41,-37,-42,-51,-51,-38,-52,-53,-54,-91,-83,-83,-92,-95,-90,-159,-159,-168,-129,-134,-112,-179,-179,-175,-167,-242,-168,-157,-169,-311,-315,-351,-346,-341,-346,-327,-338,-366,-372,-347,-265,-325,-326,-325,-316,-371,-384,-391,-388,-380,-370,-375,-370]} 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Nc3 Nbd7 7. O-O Be7 8. e4 {D25: Queen's Gambit Accepted: 4 e3: sidelines and 4...Bg4.} O-O {[#]} 9. e5 $146 ({Predecessor:} 9. Be3 c5 10. dxc5 Bxc5 11. Bxc5 Nxc5 12. Qxd8 Rfxd8 13. Ne5 Bh5 14. f3 Ncd7 15. Nxd7 Nxd7 {½-½ (25) Simantsev,M (2403)-Matulovic,M (2433) Bucharest 2000}) 9... Ne8 $1 10. Be3 {White is slightly better.} c6 11. h3 Bh5 12. g4 Bg6 13. Ne1 Nb6 14. Bb3 Nc7 15. f4 {Hoping for f5.} f5 16. Nd3 (16. exf6 $5 Bxf6 17. Nf3 $11) 16... Nbd5 17. Qd2 Qd7 18. Rac1 Rad8 19. Nxd5 Nxd5 20. Nc5 Bxc5 21. Rxc5 fxg4 22. hxg4 Be4 23. Qe1 Qf7 {aiming for ...Qg6!} 24. Bd2 {[#]} Qg6 $1 {[%mdl 512]} 25. Qh4 Rd7 $40 {[%mdl 128] Black is up to no good.} 26. Qh5 Qxh5 27. gxh5 Nc7 28. Be3 Bd5 29. Bd1 Bxa2 30. Bg4 Bd5 31. f5 (31. Rc3 $142) 31... exf5 $1 $17 32. Rxf5 Rxf5 33. Bxf5 Rf7 34. Bc8 (34. Bg4 $17) 34... Rf3 $19 35. Bf2 {[#]} Rb3 $1 36. Bh4 (36. Rc2 $142) 36... Kf7 37. Rc2 Be6 38. Rf2+ (38. Bd8 $142) 38... Ke8 39. Rg2 Bxc8 40. Rxg7 Nd5 ({Inferior is} 40... Rxb2 41. Rxc7 Bf5 {[#]} 42. e6 $1 $14 {[%mdl 512]}) 41. Rg8+ Kd7 42. e6+ Kxe6 43. Rxc8 {[%mdl 4096] Endgame KRB-KRN} Rh3 44. Bd8 Rxh5 45. Rb8 Kd7 46. Ba5 b6 {Black is winning.} 47. Bd2 a5 48. Kg2 Kc7 49. Rh8 Kb7 {Accuracy: White = 61%, Black = 91%.} 0-1

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.21"]
[Round "9.2"]
[White "Ragger, Markus"]
[Black "Grandelius, Nils"]
[Result "1/2-1/2"]
[ECO "B52"]
[WhiteElo "2670"]
[BlackElo "2659"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,54,39,30,18,39,27,21,34,44,41,35,29,23,43,40,21,28,23,40,32,23,20,28,2,54,0,60,35,31,0,56,0,38,0,56]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nf6 6. Nc3 g6 7. d4 cxd4 8. Nxd4 Bg7 9. f3 O-O 10. Be3 Nc6 11. O-O a6 12. Qd3 {B52: Sicilian: Moscow Variation with 3...Bd7.} Rfc8 13. b3 $1 b5 {seems to push 13...Qd8 aside.} 14. cxb5 Ne5 15. Qd2 d5 $1 16. Nxd5 Nxd5 17. exd5 axb5 18. Rad1 {[#]} Qxd5 $146 ({Predecessor:} 18... b4 19. Qe2 Rc3 20. Bf2 Bf6 21. Nb5 Rcc8 22. d6 Rab8 23. Nc7 exd6 24. Nd5 Bd8 {1-0 (36) Xiong,J (2712)-Van Foreest,J (2644) Wijk aan Zee 2020}) 19. Qe2 Nc6 {[%cal Rc6d4]} 20. Nxb5 Qe6 21. Rfe1 Nb4 $1 {[%cal Rb4c2]} 22. Nd4 $36 {[%mdl 2048] White fights for an advantage.} Qf6 (22... Bxd4 $11 23. Bxd4 Qxe2 24. Rxe2 Rxa2 25. Rxa2 (25. Rxe7 Nc6 $15) 25... Nxa2) 23. Rd2 ({White should try} 23. a4 $14) 23... h5 (23... Qe5 $11) 24. Nb5 Qe6 25. Nd4 Qf6 (25... Qa6 $11) 26. Nb5 Qe6 $1 27. Nd4 Qf6 {Accuracy: White = 70%, Black = 75%.} (27... Qa6 $11) 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.21"]
[Round "9.3"]
[White "Anton Guijarro, David"]
[Black "Firouzja, Alireza"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2697"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,109,28,33,29,36,41,37,36,47,44,65,63,96,96,97,96,102,100,96,93,94,103,81,78,91,94,104,119,137,103,162,133,103,118,112,135,196,172,211,205,220,185,213,209,286,271,289,258,285,319,257,179,518,126,128,160,354,6,6,6,6,-71,-71,-183,-183,-227,-227,-227,-226,-226,0,0,0,0,0,0,0,0,0,0,0,-55,0,0,0,0,0,0,0,0,0,0]} 1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be2 e5 7. d5 a5 8. Bg5 h6 9. Bh4 Na6 10. Nd2 Bd7 11. a3 {E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} Qe8 12. g4 $5 {[%mdl 4] Exploring less charted territory.} a4 13. f3 {White is slightly better.} h5 14. Rg1 {[#]} hxg4 $146 ({Predecessor:} 14... Nc5 15. Bf2 hxg4 16. fxg4 Nh7 17. g5 Qe7 18. Bxc5 dxc5 19. Nf3 f6 20. gxf6 Rxf6 {½-½ (66) Stern,R (2522)-Hansch,K (2231) Berlin 2017}) 15. fxg4 Nh7 16. Qc2 Nc5 17. O-O-O Bh6 18. g5 Qe7 {[%cal Rh6g5]} 19. Nf3 Nb3+ 20. Kb1 Bg7 21. Bf2 Nd4 22. Qd2 (22. Bxd4 $6 exd4 23. Nxd4 Nxg5 $11) 22... Nxe2 23. Qxe2 f5 24. Be3 fxe4 (24... f4 $16) 25. Nd2 Rf4 26. Bxf4 (26. Ncxe4 $6 Rh4 $11) 26... exf4 27. Ndxe4 Re8 (27... Bxc3 $16 28. Nxc3 (28. bxc3 $2 Bf5 $19) 28... Qxe2 29. Nxe2 f3) 28. Qf2 $18 Qf7 {...Bf5 is the strong threat.} 29. Ka1 $1 Qf5 30. Rde1 $1 Be5 31. h4 Qh3 32. Rh1 Qd3 33. h5 Bf5 34. hxg6 Bxg6 35. Rh6 Kf7 $2 {[#]} (35... Bxe4 {is more resistant.} 36. Rxe4 Re7) 36. Qh4 $2 (36. Rxg6 $1 $18 {[%mdl 512] is the precise move to win.} Bxc3 (36... Kxg6 37. Qh4) 37. Re6 (37. Nxc3 Rxe1+ 38. Qxe1 Qxg6 $11) 37... Bxe1 38. Qxf4+ Kg7 39. Rxe8 (39. Nf2 Bxf2 40. Rxe8 Bd4 $11) 39... Qd1+ 40. Ka2 Qb3+ 41. Kb1 Qd1+ 42. Qc1 Qxc1+ 43. Kxc1) 36... Nf8 $16 37. Qh1 $1 Bg7 $2 (37... Bxc3 $16 38. Nxc3 Rxe1+ 39. Qxe1 Qxc4) 38. Rh4 $2 (38. Rh3 $1 $18 {[%cal Rh3d3]} Qd4 39. Qf1) 38... Rxe4 $1 $11 39. Rxe4 Bxc3 40. Rhxf4+ (40. Rexf4+ $11 Kg7 41. Rf3 Bxb2+ {[%mdl 64] Double Attack} 42. Ka2 (42. Kxb2 Qe2+ 43. Ka1 Qe5+ {[%mdl 64] Double Attack} 44. Ka2 Qe2+ 45. Ka1 Qe5+ {[%mdl 64] Double Attack} 46. Ka2 Qe2+ 47. Ka1 $11)) 40... Kg8 $17 41. bxc3 (41. Qf3 $17 {keeps fighting.} Qxf3 42. Rxf3 Bxe4 43. Rxc3) 41... Qxc3+ $19 {[%mdl 64] Double Attack} 42. Ka2 {aiming for Qd1.} Qb3+ 43. Ka1 {Rxf8+! would kill now.} Qxa3+ 44. Kb1 {White wants to mate with Rxf8+!} Nd7 $2 (44... Qd3+ $19 45. Kb2 Qd2+ 46. Ka3 Qc3+ 47. Ka2 (47. Kxa4 $2 Ne6 $19) 47... Nd7) 45. Kc2 $11 Ne5 {[#]} ({Stronger than} 45... Nc5 46. Rf8+ $1 {[%mdl 512]} Kxf8 47. Qh8+ Kf7 48. Qf6+ Kg8 49. Qxg6+ Kh8 50. Rh4#) (45... Qe3 $5 46. Qh4 $8 Bxe4+ 47. Rxe4 Qb3+ 48. Kd2 Qb4+ 49. Ke3 Ne5 $11) 46. Qh6 $1 {[%csl Gh6][%cal Rf4f8]} Bxe4+ 47. Rxe4 {[%mdl 4096] Endgame KQR-KQN} Qa2+ 48. Kd1 {Strongly threatening Qe6+.} Qb3+ 49. Kc1 Qc3+ 50. Kd1 ({White should try} 50. Kb1 $11) 50... Qd3+ (50... Qf3+ $1 $15 51. Kd2 {[#]} Nxc4+ $1 {[%mdl 576] Remove Defender, Decoy} 52. Rxc4 {[%mdl 64] Double Attack} Qxd5+ 53. Kc3 Qf3+ 54. Kd2 Qf2+ 55. Kd3 Qf1+ 56. Kc3 Qf3+ 57. Kd2 Qf2+ 58. Kd3 Qf3+ 59. Kd2) 51. Kc1 {The position is equal.} Qxe4 52. Qe6+ Kf8 53. Qh6+ $1 Ke8 54. Qe6+ Kd8 55. Qg8+ {Accuracy: White = 66%, Black = 65%.} 1/2-1/2

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.21"]
[Round "9.4"]
[White "Shankland, Sam"]
[Black "Vitiugov, Nikita"]
[Result "1-0"]
[ECO "A10"]
[WhiteElo "2683"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,109,39,24,21,25,21,10,37,-20,0,0,-2,-12,-20,-179,-19,-43,-20,-40,0,0,0,0,0,0,20,-26,25,24,27,23,24,20,20,20,22,27,73,76,72,76,82,89,98,50,50,-7,50,56,57,4,47,47,45,56,73,72,72,68,78,87,104,113,113,98,280,268,270,257,252,250,338,322,355,306,339,313,345,307,306,306,538,538,543,543,543,528,544,514,514,473,1372,1244,1445,1387,1085,989]} 1. c4 b6 2. e4 Bb7 3. Nc3 Nf6 4. f3 c5 5. Nge2 e6 6. d4 cxd4 7. Nxd4 Nc6 {[%cal Bb8c6,Bc6e5,Be5g4][%mdl 32]} 8. Be3 Be7 {[#] A31: Symmetrical English: 2 Nf3 Nf6 3 d4.} 9. Qd2 $146 ({Predecessor:} 9. Be2 O-O 10. O-O Qb8 11. Qe1 Rc8 12. Nxc6 Bxc6 13. Bd4 Nh5 14. g3 Nf6 15. a3 d6 16. Qf2 {½-½ (42) Hofstetter,H (2329)-Ristea,T (2351) ICCF email 2017}) 9... O-O 10. O-O-O Ne5 {The position is equal.} 11. f4 (11. Ndb5 $14) 11... Neg4 12. e5 Ne4 13. Nxe4 Bxe4 14. Be2 $2 {[#]} (14. Qe2 $11 {and White stays safe.} Nxe3 15. Qxe3) 14... f5 $2 (14... Bb4 $1 $19 {[%cal Rb4d2][%mdl 512]} 15. Qxb4 Nxe3) 15. exf6 Nxf6 16. Bd3 Qc8 17. Bxe4 Nxe4 18. Qc2 Nd6 19. b3 Qb7 20. Kb1 Rac8 (20... Ne4 $142) 21. Rhe1 $11 Rc7 22. Bc1 b5 {[%cal Rb5c4]} 23. c5 {Black should prevent c6.} Nf5 24. Nxf5 Rxf5 25. Rxd7 Rfxc5 26. Rxc7 Rxc7 27. Qe2 Rc6 {[#]} 28. f5 $1 {[%mdl 512]} Bb4 (28... exf5 29. Qxe7) 29. Rd1 exf5 30. Qe8+ Bf8 31. Rd7 {[%mdl 1024] Threatening mate with Qf7+. White has compensation.} Qc8 32. Qf7+ Kh8 33. Bb2 {[%cal Rb2g7]} Rg6 34. g3 f4 35. Qxf4 {White stays focused until the end.} Re6 {Hoping for ...Re1+.} 36. a3 $1 Re2 {( -> ...Qc2+!)} 37. Rc7 $1 Qe8 38. Qf5 {Rc8! is the strong threat.} Kg8 39. Rxa7 $40 {[%mdl 128] Black is in trouble.} Qe4+ $2 (39... Rd2 $16 {was called for.}) 40. Qxe4 $18 Rxe4 {[%mdl 4096] Endgame KRB-KRB} 41. Rb7 Re1+ 42. Ka2 Re2 43. Rxb5 Be7 {[#] Threatening ...Bf6.} 44. Kb1 $1 Re1+ {[#]} 45. Kc2 $1 Re2+ 46. Kc1 Rxh2 47. b4 h5 $2 (47... Rh6 {is a better defense.} 48. Rb7 Rc6+ 49. Kd2 Kf7) 48. a4 {White is clearly winning.} Rh1+ 49. Kc2 Rh2+ 50. Kb3 Rh3 51. Bc3 Rxg3 52. Rxh5 g5 (52... Bf6 $142 53. Rc5 Kf7) 53. Rh6 Bf8 54. Rc6 g4 55. a5 {Accuracy: White = 90%, Black = 61%.} 1-0

[Event "Prague Festival Masters 2020"]
[Site "Prague"]
[Date "2020.02.21"]
[Round "9.5"]
[White "Duda, Jan-Krzysztof"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2755"]
[BlackElo "2721"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2020.02.12"]
[EventType "tourn"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,67,9,15,10,10,9,9,7,20,-22,-14,-5,-2,-14,0,-15,-9,-10,-10,-14,-12,-10,33,40,34,29,23,32,38,47,42,31,64,51,52,48,63,29,52,39,153,158,158,146,142,152,257,257,283,123,596,182,1510,1512,1408,1466,29990,29991]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Qa4+ Nc6 6. e3 O-O 7. Qc2 {is now debated instead of 7.Bd2. D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} Re8 8. Bd2 a6 9. a3 {The position is equal.} Bd6 10. O-O-O $5 {[%mdl 4] An interesting side line.} Bd7 {[#]} 11. c5 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 11. e4 dxe4 12. Nxe4 e5 13. dxe5 Nxe4 14. exd6 cxd6 15. Be3 Rc8 16. Kb1 Bf5 17. Bd3 {0-1 (31) Donchenko,A (2410)-Luther,T (2580) Bad Zwesten 2004}) 11... Bf8 12. e4 dxe4 13. Nxe4 Nxe4 14. Qxe4 Ne7 15. Bd3 {[%csl Gd3][%cal Re4h7]} g6 16. Ne5 Bc6 17. Qf4 Nf5 18. g4 Bh6 19. Nxc6 bxc6 20. Qe4 Bxd2+ 21. Rxd2 Ne7 {[%cal Bf5e7,Be7d5,Bd5f4][%mdl 32]} 22. Bc4 Nd5 23. h4 Qf6 24. h5 e5 25. Kb1 Rad8 (25... Rab8 $14 26. Ka1 (26. Bxd5 cxd5 27. Qxd5 Red8 $11) 26... exd4 27. Qxd4 Qf3 28. Bxd5 Qxd5 29. Qxd5 cxd5) 26. Re2 $16 ({Worse is} 26. Bxa6 exd4 27. Qc2 Qf4 $11) 26... Nf4 27. Re3 Nd5 {[#]} 28. hxg6 $1 hxg6 {[#]} (28... Qxg6 $16 29. Qxg6+ hxg6) 29. Reh3 $1 $18 {dxe5 is the strong threat.} Kf8 30. Bxa6 (30. Ka2 $18) 30... Qxf2 $2 {[%mdl 8192] Black cannot hold the game after this.} (30... Re6 $16 {is tougher.}) 31. Rf3 $2 $40 {[%mdl 128] White attacks with force.} (31. Rf1 Nc3+ 32. Rxc3 exd4 33. Qh1 Qxf1+ 34. Bxf1 dxc3 35. Bc4) 31... Qxd4 $2 (31... Rb8 32. Rxf2 (32. Rh8+ Kg7 $14) (32. b4 Qd2 $14) 32... Nc3+ {[%mdl 64] Double Attack} 33. Kc2 Nxe4) 32. Qxg6 $1 {[%csl Gg6][%cal Rf3f7][%mdl 64] Double Attack} Nf4 {[#]} 33. Qf6 $1 {[%cal Rh1h8][%mdl 512]} Qe4+ {[#]} 34. Bd3 $1 {[%mdl 512] Accuracy: White = 72%, Black = 56%.} 1-0

