[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.1"]
[White "Pijpers, Arthur"]
[Black "Fus, Jakub"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2485"]
[BlackElo "2384"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,83,23,29,22,37,31,8,17,29,11,9,12,14,12,6,22,57,41,74,64,78,85,79,20,17,14,27,18,77,64,110,108,91,108,101,72,104,98,110,100,186,187,240,230,222,229,239,245,244,243,257,219,225,186,417,400,462,439,616,574,627,590,683,646,669,633,633,622,598,518]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 c5 6. Be3 cxd4 7. Nxd4 Ne7 8. c4 Nbc6 9. Qa4 $1 {Black must now prevent Nc3. B12: Caro-Kann: Advance Variation.} dxc4 10. Nc3 a6 {...b5 is the strong threat.} 11. O-O-O {The position is equal.} ({Much worse is} 11. Qxc4 Nxd4 12. Bxd4 b5 $15) ({Much weaker is} 11. Bxc4 b5 12. Ncxb5 axb5 13. Qxb5 Be4 $17) 11... Qa5 {11...Qc8 is not played anymore.} 12. Qxa5 Nxa5 13. Nxf5 Nxf5 14. Bb6 Nc6 15. f4 {[#]} h5 $146 {[%cal Og7g5]} ({Predecessor:} 15... Rc8 16. g3 g5 17. Ne4 Be7 18. g4 Nh4 19. fxg5 Nxe5 20. Bd4 Nd3+ 21. Kb1 O-O 22. Bxd3 cxd3 23. Rxd3 {½-½ (76) So,W (2770)-Le,Q (2709) chess24.com INT 2020}) 16. Bxc4 Rc8 {[%cal Og7g5]} 17. Kb1 Bb4 18. Ne4 $1 Ba5 {[#]} 19. Bxa5 {White is much more active.} ({White should try} 19. Bc5 $1 $16) 19... Nxa5 $11 {Pair of Knights!} 20. Be2 Ke7 21. Rd3 Nc6 (21... Rhd8 $11) 22. Rhd1 $16 {And now Rd7+ would win.} Rc7 {Prevents Rd7+.} (22... Rhd8 $14 {feels stronger.}) 23. Nd6 g6 24. Bf3 Rb8 25. Rc3 Kf8 26. Nxf5 exf5 27. Rd6 Ke7 (27... h4 $16) 28. Bxc6 $18 Rxc6 (28... bxc6 $142 29. Kc2 (29. Rcxc6 Rxc6 30. Rxc6 Rb4 $16) 29... Rb4) 29. Rcxc6 bxc6 30. Rxc6 {[%mdl 4096] Endgame KR-KR} Rb4 31. g3 (31. Rxa6 Rxf4 32. a4 Rg4 $16) 31... a5 {[%cal Oh5h4] [#]} 32. h4 $1 Re4 33. Kc2 Re2+ 34. Kb3 Rg2 $2 (34... Re4 {is a better defense.} 35. Rc7+ Ke6) 35. Rc3 Kd7 36. a3 {[%cal Ba2a3,Ba3a4][%mdl 32] White is clearly winning.} a4+ (36... Ke6 $142 37. Ka4 Rxb2) 37. Kxa4 Rxb2 38. Rb3 {Inhibits Rb8.} Rc2 39. Kb4 Rc8 40. Rd3+ Ke7 41. a4 {Strongly threatening a5.} Rb8+ 42. Kc5 {Weighted Error Value: White=0.04 (flawless) /Black=0.33} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.2"]
[White "Kozak, Antoni"]
[Black "Mirzoev, Azer"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "2356"]
[BlackElo "2420"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,95,0,0,-20,0,0,0,0,0,-18,-24,-33,-20,-27,-37,-24,-24,-47,-38,-39,-38,-41,-38,-42,-37,-45,-34,-29,-4,-5,0,-10,-5,-16,-12,-9,-10,-5,-11,-5,0,0,0,0,0,0,0,0,0,0,0,-95,-90,-91,-57,-56,-62,-73,-35,-164,-156,-171,-164,-230,-212,-224,-207,-267,-242,-235,-224,-439,-382,-837,-381,-5252,-5139,-12840,-12840,-12841,-12841,-12841,-12841,-29992,-29993,-29999]} 1. d4 d5 2. Bf4 c5 3. e3 Nc6 4. c3 Nf6 5. Nd2 Bf5 6. Ngf3 e6 $1 {6...e6 is better than 6...Qb6.} 7. Ne5 {D00: 1 d4 d5: Unusual lines.} Nxe5 8. dxe5 Nd7 9. e4 {The position is equal.} dxe4 {[#]} 10. Qe2 $146 ({Predecessor:} 10. Qa4 Be7 11. Nxe4 O-O 12. Rd1 Nb6 13. Qb5 Qc7 14. Nd6 Bc2 15. Rd2 Ba4 16. Qa5 {0-1 (36) Bellon Lopez,J (2351)-Blomqvist,E (2538) Vaxjo 2020}) 10... Qb6 11. O-O-O Qa5 12. a3 Qa4 {[%cal Oe4e3]} 13. g4 Bg6 {[%cal Oe4e3]} 14. Qb5 (14. Bg2 {with more complications.} Be7 15. Bxe4 b5 16. Bxg6 Qxf4 17. Be4) 14... Qxb5 15. Bxb5 a6 16. Ba4 {[%cal Od2e4]} b5 17. Bc2 e3 18. fxe3 Bxc2 19. Kxc2 {[%cal Oa3a4]} Nb6 20. Ne4 Nd5 21. c4 bxc4 22. Nd2 g5 23. Bxg5 Rg8 $1 24. Bf4 Rxg4 25. Rdg1 $1 Rxg1 26. Rxg1 Nxf4 27. exf4 $11 {[%mdl 4096] Endgame KRB-KRN} Rd8 28. Ne4 ({But not} 28. Nxc4 Rd4 29. Kb3 Rxf4 $17) 28... Rd4 29. Nf6+ Ke7 30. Rg4 h5 31. Rh4 (31. Nxh5 $11 Bh6 32. Rg8) 31... Bg7 $17 32. Ng8+ Kd7 {[%cal Og7e5] [#] Hoping for ...Bxe5!} 33. Rxh5 {Strongly threatening Rh7.} Rxf4 {...Rf5 is the strong threat.} 34. Rg5 Bf8 35. Nf6+ {This costs White the game.} (35. Rh5 $1 $15) 35... Kc6 $19 36. Rg8 Be7 37. Ng4 (37. Ra8 $142) 37... Kd5 38. h3 Rf3 39. Re8 Bh4 40. Rh8 Bg3 ({Inferior is} 40... Rxh3 41. Rh7 $17) 41. Rh5 {[#]} (41. Rd8+ Ke4 42. Rc8) 41... Kd4 42. a4 $2 (42. h4) 42... c3 (42... Bf4 $142 {( -> ...Rf1)} 43. Rh8 Rf1 44. Rd8+ Ke4) 43. b3 $2 (43. bxc3+ Rxc3+ 44. Kb2) 43... Rd3 44. Rh7 Rd2+ 45. Kc1 Bf4 46. Rxf7 Rf2+ 47. Kb1 c2+ 48. Ka1 c1=Q# {Weighted Error Value: White=0.70/Black=0.14 (very precise)} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.3"]
[White "Neuman, Petr"]
[Black "Vojta, Jakub"]
[Result "0-1"]
[ECO "A16"]
[WhiteElo "2402"]
[BlackElo "2289"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,70,20,0,0,-4,0,-1,-6,0,0,-15,-18,-39,0,-70,-66,-78,-68,-77,0,-57,0,-12,0,0,0,0,15,40,46,17,25,0,0,0,0,-68,-66,-48,-31,-98,-59,-54,-69,-75,-69,-104,-102,-100,-131,-88,-95,-97,-91,-118,-92,-138,-129,-322,-300,-422,-337]} 1. c4 Nf6 2. Nc3 e5 3. e3 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3 Be7 {A28: English Opening: Four Knights Variation.} 7. Be2 Be6 8. O-O O-O {The position is equal.} 9. Qc2 f5 10. Bd2 Nb6 11. a3 {[#]} g5 $146 {[%cal Bg7g5,Bg5g4][%mdl 32]} ({Predecessor:} 11... Bf6 12. b4 a6 13. Rab1 Qe7 14. Bc1 g6 15. h3 Rfd8 16. Bb2 Rd6 17. Nd2 Qf7 {1-0 (55) Diaz Rubi,F (2234)-Reina Guerra,E (2057) ICCF email 2019}) 12. Rfd1 ({Better is} 12. d4 $11) 12... g4 $15 13. Ne1 a5 14. b3 {[%cal Od3d4] Inhibits a4.} h5 {Black is more active.} (14... Rc8 $17) 15. Na4 (15. d4 $1 $11) 15... Nxa4 (15... Qe8 $15) 16. bxa4 $11 Bd6 17. Rab1 Ra7 18. Rb5 {[%cal Od3d4]} Bxa3 19. d4 exd4 20. Bc4 (20. Nd3 $5 {[%cal Rd3f4]} Bd6 21. Nc5 Bxc5 22. Rxc5 $11) 20... Qe7 21. e4 Bxc4 22. Qxc4+ Qf7 23. Qxf7+ (23. Qe2 $11 Qe6 24. Qd3) 23... Rxf7 $15 24. exf5 {[%cal Of5f6]} b6 25. Nd3 ({White should try} 25. f6 $1 $15) 25... Ne7 26. f6 $1 Rxf6 {White must now prevent ...c5.} 27. Rxh5 {[#]} c5 $1 {[%cal Bc7c5,Bc5c4,Bc4c3][%mdl 32]} 28. Rh4 c4 $36 {[%mdl 2048] Black is on the roll.} 29. Ne5 c3 {...Nc6 is the strong threat.} 30. Rxg4+ Kh7 31. Bc1 {[#]} Bxc1 32. Rxc1 Rf5 33. Nf3 ({White should play} 33. Re4) 33... Rxf3 $1 $17 34. gxf3 (34. Rh4+ $17 {was called for.} Kg7 35. Rxd4) 34... Rd7 $19 35. f4 (35. Kf1 {is the only way for White.} d3 36. Rc4 (36. Rxc3 $2 d2 $19)) 35... Nf5 {Weighted Error Value: White=0.29 (precise) /Black=0.10 (very precise)} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.4"]
[White "Van Osch, Mees"]
[Black "Haring, Filip"]
[Result "0-1"]
[ECO "B32"]
[WhiteElo "2364"]
[BlackElo "2398"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,78,18,20,29,25,33,8,13,8,59,27,43,52,53,53,54,54,56,59,54,55,59,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-385,-371,-320,-102,-5173,-5173,-29991,-29992,-29992,-29992,-29992,-29989,-29989,-29990,-29990,-29991,-29991,-29992,-29992,-29993]} 1. e4 c5 2. Nf3 {[%cal Bg1f3,Bf3d4,Bd4b5,Bb5a3,Ba3c4][%mdl 32]} Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. N1c3 a6 7. Na3 Be6 8. Nc4 Rb8 {B32: Sicilian: Löwenthal and Kalashnikov Variations.} 9. g3 h5 10. h4 {[#]} Nd4 $146 {The position is equal.} ({Predecessor:} 10... g6 11. Bg5 f6 12. Bd2 Nge7 13. Ne3 d5 14. exd5 Nxd5 15. Bg2 Nxc3 16. Bxc3 Qxd1+ 17. Rxd1 {½-½ (44) Saric,I (2653)-Horvath,D (2455) Reykjavik 2021}) 11. Ne3 g6 ({Black should try} 11... Nf6 $11) 12. Bg2 Bh6 13. Ncd5 Bxd5 14. Nxd5 Bxc1 15. Rxc1 Nf6 16. Nxf6+ Qxf6 17. c3 Nc6 18. O-O (18. Qa4 $14) 18... g5 $1 $11 19. hxg5 Qxg5 20. Qxd6 h4 21. Rcd1 {Bh3 is the strong threat.} Rd8 $1 22. Qc7 {aiming for Rxd8+.} hxg3 23. Rxd8+ Nxd8 24. Rd1 {And now Qd7+ would win.} gxf2+ 25. Kxf2 {Strongly threatening Qd7+.} Qf4+ 26. Kg1 {[%csl Gc7][%cal Rd1d8]} Qh2+ 27. Kf1 {[%csl Gc7][%cal Rd1d8]} Ne6 28. Qb8+ (28. Qxb7 Qf4+ 29. Ke2 Qg4+ 30. Ke1 (30. Kf2 $2 Qxd1 31. Qb8+ Qd8 $19) 30... Rh2 $17) 28... Ke7 29. Qxb7+ Kf8 {Hoping for ...Qf4+. Dancing on a razor blade.} 30. Qb8+ $2 {[%mdl 8192]} (30. Qxa6 $2 Qf4+ 31. Ke1 Qg3+ 32. Kd2 Qxg2+ 33. Kc1 Rh2 34. Qd6+ Kg7 $19) (30. Rd3 $11 {and White has nothing to worry.}) 30... Kg7 $19 31. Qb6 {[#]} Rh6 $2 ({Inferior is} 31... Nf4 32. Qg1 $11) (31... Nd4 $1 $19 {[%mdl 512] and Black stays clearly on top. ( -> ...Qf4+)} 32. Rxd4 (32. cxd4 $2 Qf4+ 33. Ke2 Qg4+ 34. Kf2 Qxd1 $19) 32... Qf4+ 33. Ke1 (33. Ke2 $2 Rh2 $19) 33... Qe3+ 34. Kd1 Qg1+ 35. Kc2 exd4) 32. Rd2 $2 {[%mdl 8192] [#] Now White is beyond hope.} (32. Qf2 $17) 32... Nd4 $1 {[%mdl 512]} 33. Qb8 (33. Qxh6+ Qxh6) 33... Qf4+ {Black mates.} 34. Kg1 Qe3+ 35. Rf2 Qe1+ 36. Bf1 Rg6+ 37. Kh1 Qxf2 {[%csl Gg6][%cal Rf2g1]} 38. Qxe5+ Kh7 {[%csl Gf2][%cal Rg6g1]} 39. Qh2+ Rh6 {Weighted Error Value: White=0.87/Black=0.12 (very precise)} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.5"]
[White "Carlsson, Ludvig"]
[Black "Urkedal, Frode Olav Olsen"]
[Result "1-0"]
[ECO "E36"]
[WhiteElo "2355"]
[BlackElo "2553"]
[Annotator "TA"]
[PlyCount "161"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,161,12,6,10,0,0,0,21,0,0,0,0,0,0,0,18,0,0,0,10,0,0,0,0,0,10,6,15,4,31,24,25,0,22,24,25,32,32,17,64,53,100,61,64,56,64,65,79,64,64,64,64,64,69,80,69,64,158,154,167,139,159,158,166,158,160,139,158,88,160,159,147,150,108,65,108,65,65,36,73,65,75,75,106,0,72,70,70,72,72,72,72,65,65,72,65,80,65,65,65,65,65,65,65,65,66,65,91,65,72,8,8,8,8,0,0,0,45,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,29974,29977,29977,29978,29975,29978,29978,29980,29979,29981,29981,29982,29985,29982,29977,4133]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 {[%cal Bd7d5,Bd5d4][%mdl 32]} 5. a3 Bxc3+ 6. Qxc3 O-O 7. Bg5 c5 {E36: Nimzo-Indian: Classical: 4...d5 5 a3.} 8. dxc5 d4 $1 9. Qf3 $1 {[%mdl 4] is more profitable than 9.Qg3 at the moment.} e5 {[#] The position is equal.} 10. Bxf6 $146 (10. e3 {is more complex.} Nbd7 11. exd4 exd4 12. O-O-O Nxc5 13. Ne2) ({Predecessor:} 10. e3 Nbd7 11. O-O-O Nxc5 12. exd4 exd4 13. Bxf6 Qxf6 14. Qxf6 gxf6 15. Ne2 Rd8 16. b4 {1-0 (57) Theodorou,N (2554)-Raja,H (2472) Lichess.org INT 2020}) 10... Qxf6 11. Qxf6 gxf6 12. e3 dxe3 13. fxe3 a5 14. O-O-O Be6 15. Rd6 Rc8 16. Ne2 Nd7 17. Nc3 Nxc5 18. Be2 Kf8 19. Rhd1 Ke7 20. Rb6 Ra6 (20... Rc6 $5 {[%cal Rc6b6]} 21. Rb5 b6 $14) 21. Rxa6 Nxa6 22. b3 Rd8 23. Rxd8 Kxd8 $11 {[%mdl 4096] Endgame KBN-KBN} 24. Kc2 f5 25. Bf3 e4 (25... b6 $11) 26. Be2 $14 Ke7 (26... b6 $14) 27. Nb5 Kf6 28. Kc3 Ke5 29. g3 Bd7 30. Nd4 b6 31. b4 axb4+ 32. axb4 Nc7 33. Bh5 Be6 34. Bd1 Kd6 (34... Bd7 $14) 35. Ba4 $16 Na6 36. Be8 Ke5 37. Nb5 {White is more active.} h6 38. Nd4 Nc7 39. Ba4 Bc8 40. Bb3 (40. Nc6+ $142 Kf6 41. Na7) 40... Na6 (40... Kd6 $142) 41. Ne2 Nc7 42. Nf4 Be6 (42... Kd6 $142 43. Bc2 Be6) 43. Bd1 (43. Ba4 $16) 43... Kd6 (43... b5 $14) 44. Be2 ({Better is} 44. Ba4 $16) 44... Ke5 $14 45. Nh3 Kd6 46. Bh5 Ke5 47. Nf4 Na6 48. Be2 {[%cal Oc4c5] Hoping for c5!} Nc7 49. c5 b5 50. Bd1 (50. Nxe6 fxe6 51. Kd2 Kd5 $11) 50... Bc4 51. Bh5 Be6 52. Be2 Bd7 53. Bd1 Bc8 54. Bb3 Be6 55. Kb2 (55. Nxe6 fxe6 56. Kd2 Na6 $11) 55... Kf6 56. Kc2 Ke5 57. Kc3 ({Much weaker is} 57. Nxe6 fxe6 58. h3 Na6 $11) 57... Na6 58. Ne2 ({Much worse is} 58. Nxe6 fxe6 59. Bd1 Nc7 $11) 58... Nc7 59. Nd4 Bd5 60. Bxd5 (60. Bd1 {feels hotter.} Be6 61. Nc6+ Kd5 62. Ne7+ Ke5 63. Bh5) 60... Nxd5+ $16 {KN-KN} 61. Kd2 (61. Kb3 $16) 61... Nxb4 $11 62. Nxb5 Kd5 63. Nd6 Ke6 $1 64. Nb5 {Black must now prevent Kc3.} Nc6 (64... Kd5 $11) 65. Kc3 (65. Nd4+ $1 $14 {deserves consideration.} Kd5 66. Nxf5) 65... Kd5 66. Nd6 Kxc5 67. Nxf5 h5 68. Ng7 Ne5 $1 69. Nxh5 {aiming for Nf6.} Ng4 {[%csl LRe3,LRh2] Prevents Nf6.} 70. h4 {[%cal Bh2h4,Bh4h5,Bh5h6][%mdl 32]} Nxe3 71. Nf6 Nd5+ 72. Nxd5 Kxd5 {KPP-KPP} 73. h5 {h6 would kill now.} Ke6 $2 {[%mdl 8192]} (73... Ke5 $11) 74. g4 $1 {White mates.} Ke5 75. Kd2 $1 Ke6 {[#]} 76. Ke3 $1 Ke5 77. h6 Kf6 78. Kxe4 Kg6 {[#]} 79. Ke5 $1 ({Weaker is} 79. g5 f6 $11) 79... Kh7 80. Kf5 Kxh6 81. Kf6 {Weighted Error Value: White=0.09 (flawless) /Black=0.10 (very precise)} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.6"]
[White "Jurcik, Marian"]
[Black "Bomans, Arno"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2397"]
[BlackElo "2246"]
[Annotator "TA"]
[PlyCount "171"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,171,29,29,29,37,0,36,29,29,0,20,18,31,0,17,19,23,22,29,17,29,35,31,31,31,29,36,27,32,26,18,0,12,0,25,0,0,0,0,-25,-14,-37,-36,-43,-32,-42,10,9,69,-7,0,0,13,-3,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-14,-15,-21,-18,-24,-15,-13,-11,-15,0,-52,-60,-62,-57,-43,-40,-61,0,0,0,14,52,59,112,85,116,99,341,30,31,30,20,21,31,28,34,0,52,59,60,63,90,71,78,71,71,72,166,0,248,0,168,0,235,0,0,0,585,571,700,693,741,728,675,653,798,836,867,0,170,0,629,0,0,0,0,0,0,0,0,0,0,0,12840,12841,12841,12841,12842,12842,12842,12843,12845,12845]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nc3 g6 5. h3 Bg7 6. e5 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} Ng8 7. O-O Nh6 8. Re1 {White is slightly better.} O-O {[#]} 9. d3 $146 ({Predecessor:} 9. Ne4 d6 10. exd6 exd6 11. Bxc6 bxc6 12. d4 cxd4 13. Bg5 f6 14. Bxh6 Bxh6 15. Qxd4 {1-0 (58) Travadon,L (2414)-Sahin,O (2281) Podgorica 2021}) 9... Nf5 10. Bf4 Ncd4 11. Bc4 Nxf3+ 12. Qxf3 (12. gxf3 e6 13. d4 Qh4 $17) 12... Nd4 {[%csl LRc2,LRf3]} 13. Qd1 Ne6 14. Bg3 b6 15. Bd5 Rb8 {[%cal Ba8b8,Bb8b7,Bb7c7,Bc7c6,Bc6g6][%mdl 32]} 16. Ne4 Bb7 17. Bxb7 Rxb7 18. c3 Rc7 19. Qg4 Rc6 20. f4 d5 21. Nd2 Nc7 22. f5 gxf5 23. Qxf5 Rg6 24. Bh4 Ne6 25. Rf1 Bh6 26. Rad1 Qc7 {[%cal Oe6f4]} 27. Kh1 Ng7 (27... Bg5 $15 28. Bf2 Qc6) 28. Qf2 $11 e6 (28... Qxe5 29. Rde1 Qf5 30. Qxf5 $16) (28... Ne6 $11) 29. Nf3 (29. g4 $1 $14) 29... Nf5 {[%cal Od5d4]} 30. Rde1 Nxh4 31. Qxh4 Qd8 32. Qh5 Bg7 33. d4 Rh6 34. Qg4 Rg6 35. Qh5 Rh6 36. Qg4 Rg6 37. Qh4 Qxh4 38. Nxh4 Rg3 39. Nf3 Bh6 40. Re2 cxd4 41. cxd4 Rc8 {Prevents Rc2.} 42. Kg1 Rc4 43. Kf2 Bf4 44. Rd1 b5 45. Rd3 (45. Ne1 $11) 45... b4 $1 $15 46. a3 a5 47. axb4 axb4 48. Rd1 b3 ({Better is} 48... h5 $15) 49. Ne1 $11 f6 (49... Rg7 $5 {[%cal Rh7h5]}) 50. exf6 Rg6 51. Rxe6 Kf7 (51... Bg5 $14) 52. Rb6 $16 Rc2+ 53. Kf1 $1 (53. Nxc2 bxc2 54. Rh1 (54. Rb7+ Kxf6 55. Rf1 c1=Q $17) 54... c1=Q 55. Rxc1 Bxc1 $17) 53... Rg3 $2 (53... Rxf6 $16 {is a better defense.} 54. Rxb3 (54. Nxc2 $2 bxc2 55. Rxf6+ Kxf6 $19) 54... Bg3+ 55. Nf3 (55. Kg1 Bf2+ 56. Kh2 Bxe1 $16) 55... h6) 54. Rxb3 $2 Rxb3 $11 55. Nxc2 Rxb2 $18 {[%mdl 4096] Endgame KRB-KRN} 56. Ne1 Be3 57. Nd3 {To avoid Rf2+} Rb3 58. Nc5 Rb2 (58... Rb4 $11) 59. Rd3 $14 Bg5 60. Rf3 {Nd7 is the strong threat.} Rb1+ 61. Ke2 {And now Nd7 would win.} Rb2+ 62. Kd3 $1 {Threatens to win with g4.} Rxg2 63. Nd7 $1 {Hoping for Ne5+.} Ra2 (63... Bh6 $16 {was called for.}) 64. Ne5+ $2 (64. Rf5 $1 $18 {[%cal Rf5g5]} Ke6 65. Rxg5 Ra3+ 66. Ke2 Kxd7 67. Re5 (67. Rxd5+ Ke6 $16)) 64... Kf8 $2 (64... Ke6 $1 $11) 65. Nd7+ Kf7 66. Ne5+ (66. Rf5 $142 $1 {[%cal Rf5g5]} Ke6 67. Rxg5 Ra3+ 68. Ke2 Kxd7 69. Re5 (69. Rxd5+ Ke6 $16)) 66... Kf8 $18 67. f7 $2 (67. Rf5 $18 Ra3+ 68. Kc2) 67... Ra3+ $11 68. Ke2 Ra2+ $2 {[%mdl 8192]} (68... Rxf3 $11 {and Black stays safe.} 69. Kxf3 h5) 69. Kf1 $18 {Threatening mate with Nd7+.} Ra1+ 70. Kg2 {Nd7+ would kill now.} Ra7 {Inhibits Nd7+.} 71. Kg3 Be7 72. Kg4 Bd6 73. Kf5 $1 Re7 74. Rd3 $2 ({White has to play} 74. Re3 $1 $18 Bxe5 75. Rxe5 (75. dxe5 Rxf7+ 76. Ke6 d4 $16) 75... Rxf7+ 76. Ke6) 74... Bb8 $2 {[#]} (74... Bxe5 $11 {and Black is okay.} 75. dxe5 Rxf7+ 76. Ke6 Ra7) 75. Kf6 $2 (75. Re3 $1 $18) 75... Rb7 $2 {[%mdl 8192]} (75... Bxe5+ $11 76. dxe5 Rxf7+ 77. Ke6 Ra7 78. Rxd5 Re7+ 79. Kd6 Kf7) 76. Ke6 $2 ({Only move:} 76. Ra3 $18) 76... Re7+ $11 77. Kxd5 Bxe5 78. dxe5 {[%cal Bd4e5,Be5e6,Be6e7][%mdl 32]} Rxf7 {KR-KR} 79. Ra3 {Black must now prevent Ra8+.} Rd7+ 80. Ke6 Re7+ 81. Kd6 Rb7 $2 {[%mdl 8192] [#]} (81... Kf7 $11) 82. Ra8+ $1 $18 {White is clearly winning.} Kg7 83. e6 Rb6+ 84. Kd7 Rb7+ 85. Kc6 Rb3 86. e7 {Weighted Error Value: White=0.21 (precise) /Black=0.21 (precise)} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.7"]
[White "Dev, Shah"]
[Black "Czerw, Dawid"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2243"]
[BlackElo "2396"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,106,10,19,18,38,27,28,19,16,-8,62,72,72,64,59,52,50,40,56,28,164,160,153,89,104,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-56,-55,-68,-17,-23,-21,-18,-11,-12,-22,-154,-154,-150,-141,-178,-163,-173,-163,-170,-154,-163,-136,-179,-176,-209,-138,-137,-137,-225,-140,-130,-107,-165,-106,-203,-107,-262,-264,-279,-268,-399,-382,-367,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. g3 Bf5 5. Nc3 e6 6. Nh4 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4.} Bg4 7. h3 Bh5 8. Qb3 $1 {[%mdl 4] White has an edge. is currently scoring better than 8.g4.} Qb6 9. c5 Qc7 (9... Qxb3 $11 10. axb3 Be7) 10. Bf4 $14 Qc8 {[%cal Ob7b6]} 11. g4 $36 {[%mdl 2048] White fights for an advantage.} Bg6 12. Nxg6 hxg6 13. Bg2 Nbd7 14. g5 {[#]} Ng8 $146 (14... Nh5 $11 {and Black stays safe.} 15. Bh2 b6) ({Predecessor:} 14... Nh5 15. Bh2 Be7 16. h4 Bd8 17. e3 Bc7 18. Bxc7 Qxc7 {½-½ (41) Oparin,G (2652)-Goryachkina,A (2593) Sochi 2021}) 15. e4 $1 $18 {[%cal Re4d5]} Ne7 16. exd5 {White is much more active.} (16. O-O-O $142 $1) 16... Nxd5 $16 17. Bxd5 ({White should try} 17. Nxd5 $16 cxd5 18. O-O-O) 17... exd5 $11 18. O-O-O Be7 $1 19. Rde1 {Bd6 is the strong threat.} Nf8 $1 20. h4 Ne6 21. Be5 Qd7 22. Ne2 f6 23. gxf6 gxf6 24. Bg3 Kf7 25. Qd3 b6 {[%cal Bb7b6,Bb6c5][%mdl 32]} 26. Nf4 Nxf4 27. Bxf4 {[%cal Oh4h5]} Rh5 28. Rh3 ({White should play} 28. b4 $11) 28... bxc5 29. Rhe3 ({But not} 29. Rg3 $2 Qf5 30. Qxf5 (30. Qe3 $2 Re8 $19) 30... Rxf5 $19) 29... Bf8 (29... Re8 $1 $15 30. dxc5 Rxh4) 30. Re6 {[%cal Of4g5]} Rf5 {Prevents Bg5.} 31. h5 Rxh5 32. dxc5 Bxc5 {Hoping for ...Rah8.} 33. Qc3 (33. Qc2 $11 Bb4 34. Rxc6) 33... d4 $17 34. Qb3 {White threatens Re7+ and mate.} Kg7 35. Qf3 {[%cal Of4d6] Strongly threatening Bd6!} Qd5 {Prevents Bd6.} 36. Qxd5 Rxd5 (36... cxd5 37. Rc6 Bf8 38. Rc7+ Kg8 39. Bd2 $15) 37. Rxc6 {[#]} g5 $1 38. Bd2 Rad8 39. b4 (39. f4 $17 {might work better.}) 39... Bd6 $19 40. Kc2 d3+ 41. Kb3 Be5 42. Be3 (42. Rd1 $17) 42... R8d7 43. Rd1 g4 44. Ra6 (44. Rc4 $17) 44... Bb8 (44... d2 $19 45. Rxa7 Rd3+ 46. Kc4 Rc3+ 47. Kb5 Rxa7 48. Bxa7 Bf4) 45. Bd2 (45. Rc6 $17) 45... f5 (45... Rf5 $19 46. Be3 Rf3) 46. Re1 $2 (46. a4 $17 {keeps fighting.}) 46... Be5 47. Kc4 Bd4 48. Ree6 (48. Rf1 {is the only way for White.}) 48... Bb6 {Threatens to win with ...Rd4+.} ({Stronger than} 48... Bxf2 49. Rg6+ Kf8 50. Rgf6+ Kg7 51. Rg6+ Kf8 52. Rgf6+ Kg8 53. Rg6+ Kh7 54. Rh6+ Kg8 55. Rhg6+ Kf8 $11) 49. a4 {[%cal Ba2a4,Ba4a5][%mdl 32] [#]} f4 $2 ({Inferior is} 49... Bxf2 50. Rg6+ Kh7 51. Rh6+ Kg7 52. Rhg6+ Kh8 53. Rh6+ Kg8 54. Rhg6+ Kf8 55. Rgf6+ Kg8 56. Rg6+ Kh8 57. Rh6+ Kg8 58. Rhg6+ $11) (49... Rd4+ $1 $19 50. Kb3 Re4) 50. a5 $1 $11 {The position is equal.} Bxf2 51. Rg6+ Kf7 52. Raf6+ Ke7 53. Re6+ Kf7 {White used his chance.  Weighted Error Value: White=0.26 (precise) /Black=0.26 (precise)} 1/2-1/2

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.8"]
[White "Novotny, Michal"]
[Black "Hrabusa, Matej"]
[Result "1/2-1/2"]
[ECO "A59"]
[WhiteElo "2236"]
[BlackElo "2369"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,26,37,54]} 1. d4 {Reeh,O} Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. Nf3 Bg7 10. g3 O-O 11. Kg2 Nbd7 12. h3 {12.a4 gains popularity.} Qa5 13. Re1 Rfb8 {[#]} {Predecessor:} 14. e5 $146 {A59: Benko/Volga Gambit: White castles by hand.} dxe5 15. Nxe5 Nxe5 16. Rxe5 Rb7 17. Qe2 Qb6 18. a4 Kf8 19. Ra3 Ne8 20. Re3 Bh6 21. Re6 fxe6 22. Bxh6+ Kg8 23. Rb3 {1-0 (23) Sargissian,G (2678)-Caruana,F (2662) Ohrid 2009 CBM 133 [Reeh,O]} 1/2-1/2

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.9"]
[White "Hrbek, Stepan"]
[Black "Sorm, Daniel"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "2179"]
[BlackElo "2348"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,75,17,7,3,0,20,16,58,-7,82,0,0,-11,-13,-13,-5,-25,-10,-27,0,-2,-13,-32,-16,-27,-29,-46,-35,-70,-70,-66,-44,-42,-47,-50,-32,-49,-10,-10,21,15,58,31,210,203,206,216,214,222,205,204,203,197,209,206,176,115,177,91,348,244,265,242,270,195,29980,6108]} 1. c4 e5 2. g3 d6 3. Nc3 f5 4. Bg2 Nf6 5. d3 Be7 6. f4 exf4 {A21: English Opening: 1...e5 2 Nc3.} 7. gxf4 Ng4 8. Nf3 Bh4+ {[#]} (8... c6 $11 {is more appropriate.}) 9. Kf1 $146 ({White should try} 9. Nxh4 $14 Qxh4+ 10. Kd2) ({Predecessor:} 9. Nxh4 Qxh4+ 10. Kd2 Qf2 11. Qf1 Qe3+ 12. Kc2 Qe6 13. Nd5 Na6 14. h3 Nh6 15. Bd2 {1-0 (57) Mgeladze,T (2293)-Gelashvili,T (2520) Batumi 2003}) 9... Bf2 (9... c6 $11 {remains equal.}) 10. d4 (10. Qa4+ $16 Bd7 11. Qb3) 10... Be3 $11 11. Qd3 Bxc1 12. Rxc1 O-O 13. h3 Nf6 14. e3 Na6 15. a3 c6 16. Nd2 Bd7 17. Bf3 Qe7 18. Kf2 Nc7 19. Rcg1 d5 20. Rg3 Ne4+ 21. Bxe4 fxe4 22. Qe2 Qh4 23. Kg2 Rf6 24. Rg5 Rh6 {[%cal Rd7h3]} 25. Qf2 Qxf2+ 26. Kxf2 {[%cal Rc4d5]} Rxh3 $2 ({Black should play} 26... Be6 $14) 27. Rxh3 $18 Bxh3 28. cxd5 cxd5 29. Nxd5 Nxd5 30. Rxd5 $11 {[%mdl 4096] Endgame KRB-KRN} Rc8 31. Nxe4 Rc2+ 32. Kg3 Bg2 33. Rd8+ Kf7 {[#]} 34. Ng5+ (34. Nf2 $1 $18 Bc6 35. d5) 34... Kg6 $2 {[%mdl 8192]} (34... Ke7 $16 35. Rg8 h6) 35. Rd6+ Kh5 36. Nxh7 {Black must now prevent Re6.} Bh1 37. Ng5 g6 $2 {[#]} (37... Rxb2 $18 38. Rd7 Rg2+ 39. Kh3 Re2) 38. Rd7 {Weighted Error Value: White=0.22 (precise) /Black=0.58} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.10"]
[White "Mikes, Jan"]
[Black "Cholleti Sahajasri"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2329"]
[BlackElo "2235"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,75,22,16,31,18,18,23,25,31,0,25,24,41,67,73,37,84,56,59,61,71,41,68,79,66,79,47,16,68,77,147,81,194,208,200,190,377,379,480,467,621,633,562,603,781,764,837,835,997,958,1284,1293,1365,1222,1134,1126,1243,1196,1714,1635,2385,1988,29981,29982,29982,29977,29980,6100]} 1. e4 c6 2. d4 d5 3. f3 dxe4 4. fxe4 e5 5. Nf3 Bg4 6. c3 {B12: Caro-Kann: Advance Variation.} Nd7 7. Bd3 Bd6 8. O-O {White has an edge.} Ngf6 9. Na3 $1 {[%mdl 4] now scores much better than the old 9.Nbd2.} b5 (9... Bxa3 $5 10. bxa3 O-O $14) 10. Nc2 Bh5 11. Ne3 {[#]} Bg6 $146 ({Predecessor:} 11... O-O 12. Nf5 Qc7 13. Qc2 Bg6 14. Nxd6 Qxd6 15. Bg5 c5 16. dxe5 Nxe5 17. Nxe5 Qxe5 18. Bxf6 gxf6 19. Bxb5 Bxe4 {½-½ (60) Caruana,F (2828)-Firouzja,A (2728) Stavanger 2020}) 12. a4 (12. Nh4 {keeps more tension.} O-O 13. Nef5 Qc7 14. Kh1 c5 15. d5) 12... a6 (12... O-O $1 $14) 13. axb5 (13. Nh4 {is interesting.} O-O 14. Nef5 Qc7 15. Qf3 c5 16. d5) 13... axb5 14. Rxa8 Qxa8 15. Nh4 $1 Qb8 (15... Bxe4 $2 16. Bxe4 Nxe4 17. Nef5 $18 (17. Qf3 Ng5 $16) (17. Qg4 Nef6 $11)) 16. Kh1 (16. Nxg6 hxg6 17. h3 Qa7 $11) 16... O-O 17. Nef5 $1 ({Much worse is} 17. Nxg6 hxg6 18. Bb1 c5 $11) 17... Re8 18. Qf3 ({But not} 18. Nxd6 Qxd6 19. Nxg6 hxg6 $11) 18... Bf8 (18... Bh5 $11 19. Qg3 Bf8) 19. g4 $14 {White is more active. White leaves nothing to chance now.} ({Reject} 19. Nxg6 hxg6 20. Ng3 Qd6 $11) 19... Qa8 ({Black should try} 19... Kh8) 20. Ng3 (20. g5 $142 Nh5 21. Nxg6 fxg6 22. Nh6+ $1 gxh6 23. Qf7+ Kh8 24. Qxd7) 20... h6 (20... Nb6 $16) 21. Nxg6 $18 fxg6 {[#]} 22. h4 {[%cal Bh2h4,Bh4g5][%mdl 32] Prevents g5. aiming for g5.} Qa2 $2 (22... Re7 23. Be3 Nh7) 23. g5 hxg5 24. hxg5 Nh7 25. d5 Re7 {Inhibits Qf7+.} 26. dxc6 Nb8 27. Bxb5 {[%cal Bd3b5,Bb5c4,Bc4d5,Bd5e6][%mdl 32] Black must now prevent Qd3.} Qe6 28. Kg2 Nxc6 29. Qe2 {Strongly threatening Bc4.} Kh8 30. Bc4 Qd7 31. Rd1 Qc8 32. Rh1 {And now Qd1 would win.} Nd8 {[#]} 33. Nf5 $1 {[%cal Oe2d3][%mdl 512] Threatens to win with Qd3!} Rc7 (33... Re6 34. Bd5) 34. Bd5 {[%cal Oe2g4] White wants to mate with Qg4!} Ne6 {[#]} 35. Qg4 $1 {Nh4 would kill now.} Bc5 {[#]} (35... Qa6 36. Nd4) 36. Rxh7+ $1 {[%mdl 512] White mates.} Kxh7 37. Qh3+ Kg8 38. Bxe6+ {Weighted Error Value: White=0.07 (flawless) /Black=0.76} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.11"]
[White "Lim, Zhuo Ren"]
[Black "Matras, Ondrej"]
[Result "1-0"]
[ECO "D71"]
[WhiteElo "2311"]
[BlackElo "2223"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,111,22,52,55,48,46,55,55,56,52,55,76,79,63,67,66,67,64,107,103,175,169,167,105,124,121,131,145,164,137,200,121,210,222,195,204,207,210,215,211,212,212,329,211,206,112,120,123,118,106,88,59,114,112,138,71,197,185,179,175,137,75,85,21,21,8,8,8,8,8,1017,985,2137,6230,6444,6065,3054,2442,29985,29986,29987,29983,29988,29984,29988,29985,29991,29992,29992,29993,29994,29995]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 c5 6. Nf3 Nc6 7. O-O cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 a6 11. Rd1 Qc7 12. Bd2 {A39: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 d4.} Be6 13. b3 {[#]} Nd7 $146 ({Predecessor:} 13... Ng4 14. Rac1 Qb6 15. Qf3 Rab8 16. h3 Ne5 17. Qe3 Qxe3 18. Bxe3 b6 19. Nd5 Bxd5 20. cxd5 {½-½ (62) Szuhanek,R (2476)-Pantelic,S (2300) Banja Vrujci 2017}) 14. Rac1 {White is slightly better.} Rac8 15. Qf3 Rb8 16. Nd5 Qd8 17. Qe3 (17. e4 {keeps more tension.} b6 18. Qe2 Nc5 19. f4 Re8 20. Ne3) 17... Bxd5 18. cxd5 Re8 19. Bh3 Kf8 (19... Ra8 $14) 20. Rc2 $16 Rc8 (20... b5 $16) 21. Rxc8 $18 Qxc8 22. Ba5 (22. Rc1 $18 Qd8 23. Qa7) 22... f5 $16 23. Rc1 {Prevents Qc2.} Qb8 24. g4 {[%cal Bg3g4,Bg4g5][%mdl 32]} b6 25. Bc3 (25. gxf5 $6 bxa5 26. fxg6 Nf6 $16) 25... Nf6 26. g5 Ne4 (26... Nxd5 $2 27. Bxg7+ Kxg7 28. Qd4+ Nf6 29. Rc6 $18) (26... Nh5 $16) 27. Bxg7+ $18 Kxg7 28. f3 Nc5 {[%cal Be4c5,Bc5d7,Bd7b6,Bb6c4][%mdl 32]} 29. b4 Nd7 30. Qc3+ $1 Kg8 31. e4 Rf8 (31... Qa8 $142 32. Qe3 (32. exf5 Qxd5 33. fxg6 Ne5 $18) 32... Nf8) 32. f4 b5 33. Qc7 {To avoid Qa7+} (33. exf5 $18 gxf5 34. Qd3) 33... Qb6+ 34. Qxb6 {Active counter play!} Nxb6 $16 {[%mdl 4096] Endgame KRB-KRN} 35. Rc6 Rb8 36. Kf2 Kg7 ({Better is} 36... h6 $1 $14) 37. Rc7 ({Don't play} 37. exf5 Nxd5 38. f6+ exf6 $14) 37... Kf8 {[#]} 38. Ke3 ({Weaker is} 38. exf5 Nxd5 39. Ra7 Nxf4 $15) (38. Kf3 $142 $1) 38... Nc4+ (38... Ra8 $16 {was necessary.}) 39. Kd4 $18 fxe4 40. Kxe4 a5 {[#]} 41. bxa5 ({White should play} 41. f5 $1) 41... Nxa5 $16 42. f5 ({White should try} 42. Kd3 $16) 42... b4 $1 $11 43. f6 exf6 44. gxf6 {Black must now prevent Be6.} Rb7 $1 45. Rc1 {aiming for Be6.} b3 $2 {[%mdl 8192]} (45... Kf7 $11) 46. Be6 $18 {[%cal Rc1c8]} ({Not} 46. Rc8+ Kf7 47. Be6+ Kxf6 48. axb3 Nxb3 49. Rf8+ Kg5 $17) 46... Rb8 47. axb3 Nxb3 48. Rc7 Nc5+ 49. Kf3 Nxe6 50. dxe6 {KR-KR. White mates.} Re8 51. Rf7+ Kg8 52. Re7 {[%cal Re7e8]} Ra8 53. Ke4 h5 54. Rg7+ Kh8 55. e7 d5+ 56. Kf4 {Weighted Error Value: White=0.19 (very precise) /Black=0.26 (precise)} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.12"]
[White "Mannion, Stephen R"]
[Black "Keerti Shree Reddy"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2267"]
[BlackElo "1482"]
[Annotator "RC"]
[PlyCount "125"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {[%emt 0:00:02]} c5 {[%emt 0:00:20]} 2. Nf3 {[%emt 0:00:06]} g6 {[%emt 0:00:16]} 3. d4 {[%emt 0:00:18]} cxd4 {[%emt 0:00:03]} 4. Nxd4 {[%emt 0:00:06]} Bg7 {[%emt 0:00:15]} 5. c4 {[%emt 0:00:37]} Nc6 {[%emt 0:00:10]} 6. Be3 {[%emt 0:00:18]} Nf6 {[%emt 0:00:11]} 7. Nc3 {[%emt 0:00:06]} d6 {[%emt 0:01:03]} 8. Be2 {[%emt 0:00:28]} O-O {[%emt 0:00:43]} 9. O-O {[%emt 0:00:28]} Bd7 {[%emt 0:01:22]} 10. Nc2 {[%emt 0:03:18]} Ne5 {[%emt 0:06:29]} 11. f3 {[%emt 0:02:51]} Bc6 {[%emt 0:03:50]} 12. Qd2 {[%emt 0:02:21]} b6 {[%emt 0:05:06]} 13. Rfd1 {[%emt 0:02:47]} Rc8 {[%emt 0:03:02]} 14. Rac1 {[%emt 0:02:22]} Bb7 {[%emt 0:04:07]} 15. b3 {[%emt 0:01:15]} h5 {[%emt 0:03:25]} 16. Nd5 {[%emt 0:05:17]} Ned7 {[%emt 0:14:45]} 17. Nd4 {[%emt 0:05:38]} Ba6 {[%emt 0:02:42]} 18. Bf1 {[%emt 0:04:34]} Kh7 {[%emt 0:09:59]} 19. Kh1 {[%emt 0:03:07]} Nc5 {[%emt 0:06:23]} 20. Bg5 {[%emt 0:10:45]} Ng8 {[%emt 0:05:08]} 21. g3 {[%emt 0:07:59]} Bxd4 {[%emt 0:06:04]} 22. Qxd4 {[%emt 0:00:11]} Ne6 {[%emt 0:00:03]} 23. Qd2 {[%emt 0:00:25]} Nxg5 {[%emt 0:00:15]} 24. Qxg5 {[%emt 0:00:03]} Bb7 {[%emt 0:03:25]} 25. Qe3 Qd7 {[%emt 0:03:47]} 26. Nf4 {[%emt 0:09:55]} Qc6 {[%emt 0:00:34]} 27. Bg2 {[%emt 0:00:19]} Nf6 {[%emt 0:01:37]} 28. h4 {[%emt 0:04:49]} Kg7 {[%emt 0:01:39]} 29. Bh3 {[%emt 0:03:06]} Qc5 {[%emt 0:01:01]} 30. Qd2 {[%emt 0:01:44]} Rcd8 {[%emt 0:02:40]} 31. Nd5 {[%emt 0:00:25]} Rfe8 {[%emt 0:00:38]} 32. b4 {[%emt 0:06:33]} Qc6 {[%emt 0:00:13]} 33. Qb2 {[%emt 0:00:14]} Bc8 {[%emt 0:01:04]} 34. Bg2 {[%emt 0:04:49]} e5 {[%emt 0:00:40]} 35. Rd3 {[%emt 0:07:47]} Be6 {[%emt 0:04:01]} 36. Qd2 {[%emt 0:00:34]} Qc8 {[%emt 0:04:34]} 37. a3 {[%emt 0:01:04]} Rd7 {[%emt 0:01:26]} 38. Nxf6 {[%emt 0:04:56]} Kxf6 {[%emt 0:00:02]} 39. f4 {[%emt 0:00:05]} exf4 {[%emt 0:03:09]} 40. gxf4 {[%emt 0:02:19]} Ke7 {[%emt 0:01:47]} 41. f5 {[%emt 0:32:38]} Bxc4 {[%emt 0:32:12]} 42. f6+ {[%emt 0:00:00]} Kd8 {[%emt 0:00:00]} 43. Rxd6 {[%emt 0:00:00]} Re6 {[%emt 0:00:00]} 44. Rxd7+ {[%emt 0:00:00]} Qxd7 {[%emt 0:00:00]} 45. Qxd7+ {[%emt 0:00:00]} Kxd7 {[%emt 0:00:00]} 46. Rxc4 {[%emt 0:00:00]} Rxf6 {[%emt 0:00:00]} 47. e5 {[%emt 0:00:00]} Rf2 {[%emt 0:00:00]} 48. Bh3+ {[%emt 0:00:00]} Ke7 {[%emt 0:00:00]} 49. Rc7+ {[%emt 0:00:00]} Kf8 {[%emt 0:00:00]} 50. Rxa7 {[%emt 0:00:00]} Re2 {[%emt 0:00:00]} 51. e6 {[%emt 0:00:00]} fxe6 {[%emt 0:00:00]} 52. Rb7 {[%emt 0:00:00]} Re4 {[%emt 0:00:00]} 53. Kg2 {[%emt 0:00:00]} Rxh4 {[%emt 0:00:00]} 54. Bxe6 {[%emt 0:00:00]} Rd4 {[%emt 0:00:00]} 55. Rxb6 {[%emt 0:00:00]} Rd2+ {[%emt 0:00:00]} 56. Kg1 {[%emt 0:00:00]} Rd1+ {[%emt 0:00:00]} 57. Kf2 {[%emt 0:00:00]} Ra1 {[%emt 0:00:00]} 58. Ra6 {[%emt 0:00:00]} g5 {[%emt 0:00:00]} 59. b5 {[%emt 0:00:00]} Ke7 {[%emt 0:00:00]} 60. Bd5 {[%emt 0:01:34]} Kd7 {[%emt 0:00:00]} 61. b6 {[%emt 0:00:29]} Rb1 {[%emt 0:00:00]} 62. b7 {[%emt 0:00:25]} Kc7 {[%emt 0:00:00]} 63. Ra8 {[%emt 0:00:27]} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.13"]
[White "Babula, Vlastimil"]
[Black "Ondrus, Martin"]
[Result "0-1"]
[ECO "B87"]
[WhiteElo "2561"]
[BlackElo "2267"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,84,0,0,0,30,3,18,0,88,-65,-71,-69,-94,-102,-101,-77,-87,-84,-102,-197,-93,-280,-279,-345,-225,-297,80,-168,-166,-391,-403,-373,-383,-368,-387,-387,-382,-387,-360,-342,-337,-632,-620,-593,-586,-668,-640,-610,-656,-592,-589,-539,-441,-1355,-1534,-1454,-1156,-29985,-29986,-29986,-29987,-29987,-29988,-29990,-247]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 8. O-O Be7 9. Qf3 Qb6 10. Be3 Qb7 11. a3 O-O 12. g4 {[%cal Bg2g4,Bg4g5][%mdl 32] B87: Sicilian Scheveningen/Najdorf: 6 Bc4, with early ...b5.} Nbd7 13. g5 Ne5 14. Qg2 {The position is equal.} Nfd7 {[#]} (14... Nfg4 15. Bc1 $16) (14... Nh5 $1 $11) 15. Nf5 $146 ({Predecessor:} 15. Rad1 Nc4 16. Bc1 Qb6 17. Rfe1 Bb7 18. Qh3 Nc5 19. Bxc4 bxc4 20. Re3 Bxg5 21. Rg3 Bxc1 22. Rxc1 Nxe4 23. Nxe4 Bxe4 24. Nxe6 fxe6 25. Qxe6+ {0-1 (51) Munoz,F (2159)-Reyes Rios,J (2010) Medellin 2013}) 15... exf5 $15 16. Bd5 Qb8 $1 {And now ...Nc5 would win.} 17. exf5 {[#]} Ra7 18. f6 (18. Bxa7 Qxa7) 18... Bd8 19. fxg7 Kxg7 20. Qh3 (20. f4 $17 Bb6 21. Qh3 Bxe3+ 22. Qxe3) 20... Bb6 (20... Nb6 $1 $19 21. Qh6+ Kg8) 21. Qh6+ (21. Be4 $17 h5 22. Qf5 (22. Qxh5 $2 Rh8 $19) (22. Bxb6 Nxb6 23. Qg3 Qc7 $19)) 21... Kh8 $1 $19 22. Be4 {[%csl Ge4][%cal Rh6h7]} Ng6 {Hoping for ...f5.} 23. Nd5 Re8 $2 {[#]} ({Better is} 23... f5 $1 $19 {[%cal Rf5e4]} 24. gxf6 Nxf6 $1 25. Bxb6 (25. Bxg6 $2 Rg7 $19) 25... Rg7) 24. Bxb6 $2 (24. Nxb6 $2 Rxe4 25. Nxc8 Rg4+ 26. Kh1 {[#]} Qxc8 $1 $19) (24. Bf5 $1 $16 {stays on course.} Bd8 25. Rad1) 24... Rxe4 {Black keeps a firm grip on the game.} 25. Rfe1 $2 (25. f4 f5 26. Bd8 (26. Bxa7 $2 Qxa7+ 27. Rf2 Nde5 $19)) 25... Rg4+ 26. Kf1 {White wants to mate with Re8+.} Nde5 27. Bd8 {Intending Bf6+ and mate.} ({Don't go for} 27. Nf6 $2 Rh4 28. Rxe5 dxe5 $19) ({Not} 27. Bxa7 $2 Qxa7 28. Rxe5 (28. Nf6 $2 Rh4 $19) 28... dxe5 $19) 27... f5 {[%cal Bf7f5,Bf5g4][%mdl 32]} 28. Bf6+ Kg8 29. Bxe5 dxe5 {The board is on fire.} 30. Nf6+ Kh8 {White must now prevent ...Rh4.} 31. Rad1 $2 (31. Nxh7 Rxh7 32. Qxg6) 31... Be6 32. Nxg4 fxg4 33. Rd2 Rd7 34. Rxd7 Bxd7 35. Rd1 {Inhibits Qd6.} Be6 36. Ke2 e4 {[%cal Be5e4,Be4e3][%mdl 32] Strongly threatening ...b4.} 37. Kd2 (37. Ke1 $142 Qb6 38. c3) 37... Qf4+ 38. Ke1 Bg8 {( -> ...e3)} 39. Ke2 {Prevents e3.} Qf3+ {Black mates.} 40. Kd2 Qxf2+ 41. Kc1 e3 42. Rd7 Qf1+ {Weighted Error Value: White=0.94/Black=0.30} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.14"]
[White "Blahynka, Martin"]
[Black "Nielsen, Andre"]
[Result "0-1"]
[ECO "A89"]
[WhiteElo "2399"]
[BlackElo "2232"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,70,45,35,59,0,16,-18,0,-23,-37,-8,18,6,227,0,0,0,0,-6,0,-107,-97,-122,-106,-113,-121,-102,-122,-116,-114,-105,-104,-108,-125,-162,-154,-234,-259,-280,-284,-431,-424,-418,-424,-736,-721,-628,-506,-482,-466]} 1. c4 f5 2. Nc3 Nf6 3. Nf3 g6 4. g3 Bg7 5. Bg2 O-O 6. O-O d6 7. d4 Nc6 8. d5 Ne5 9. Nxe5 dxe5 10. e4 f4 11. b4 g5 12. Re1 a6 {A89: Dutch Defence: Leningrad System: 5 Nf3 0-0 6 0-0 d6 7 Nc3 Nc6.} 13. Bb2 (13. a4 $14) 13... Qe8 $11 14. c5 {[%cal Bc4c5,Bc5d6,Bd6c7][%mdl 32] [#]} Qg6 $146 {The position is equal.} ({Predecessor:} 14... Ng4 15. Rc1 Qh5 16. h3 f3 17. Bxf3 Qxh3 18. Rc2 Rf7 19. Na4 Bd7 20. c6 bxc6 21. dxc6 Be6 22. Nc5 Raf8 23. Rc3 Qh2+ 24. Kf1 Qxf2# {0-1 (24) Michniewski,T (2190)-Duch,M (2249) Miedzyzdroje 2009}) 15. d6 exd6 16. cxd6 Qf7 17. dxc7 {Nd5 is the strong threat.} Ng4 $2 {[#]} (17... Ne8 $1 $11) 18. f3 $2 (18. Qb3 $1 $18) 18... Ne3 $1 19. Rxe3 fxe3 20. Nd5 $1 {Threatens to win with Nb6.} Be6 21. Nxe3 (21. Qc2 $11) 21... Qxc7 $17 22. Nd5 {To avoid Qb6+} Bxd5 23. Qxd5+ Kh8 24. Rc1 Qb6+ 25. Qc5 Qxc5+ 26. bxc5 Rad8 27. Bc3 {Inhibits Rd2.} Rc8 28. Ba5 g4 {Inhibits Bh3.} 29. Kf2 (29. fxg4 $17 Bh6 30. Re1) 29... Rf6 $19 30. Bd2 Rfc6 31. Rb1 (31. Bf1 {might work better.}) 31... Rxc5 32. Rxb7 Rc2 {[%csl LRa2,LRd2]} 33. Rd7 (33. Ke1 $142 Bh6 34. Bxh6 Rxg2 35. fxg4) 33... Bh6 34. Ke2 gxf3+ 35. Bxf3 Rxa2 {Weighted Error Value: White=0.53/Black=0.23 (precise)} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.15"]
[White "Plischki, Sebastian"]
[Black "Koubova, Anna Marie"]
[Result "1-0"]
[ECO "A06"]
[WhiteElo "2375"]
[BlackElo "2148"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,67,18,20,10,18,20,24,16,10,2,10,2,19,0,0,-6,8,0,0,-6,-8,-11,-16,-18,-14,-3,41,-74,-32,-37,-34,-35,-31,-129,-124,-118,-135,-111,-123,-188,-191,-189,-185,-253,-239,-253,-197,-206,-197,-297,-179,-188,0,0,0,0,558,549,1764,891]} 1. Nf3 d5 2. g3 Nd7 3. Bg2 e5 4. d3 Ngf6 5. O-O Be7 6. c4 {A07: Réti Opening: New York and Capablanca Systems.} c6 7. cxd5 cxd5 8. Nc3 {[#] White has an edge.} h6 $146 ({Predecessor:} 8... O-O 9. a3 b6 10. Nh4 Bb7 11. Nf5 h6 12. Bd2 a5 13. Rc1 Ra7 14. Nb5 Ra8 {1-0 (32) Petrosian,T (2625)-Babikov,I (2301) Minsk 2015}) 9. d4 e4 10. Ne5 O-O 11. f3 Re8 12. Nxd7 Qxd7 13. Bf4 exf3 14. Bxf3 Bd6 15. Bg2 Qd8 16. Rc1 Bg4 17. Qd2 {[%cal Of4h6]} ({Avoid the trap} 17. Nxd5 $2 Bxe2 18. Qb3 (18. Nxf6+ $2 Qxf6 19. Qd2 Bxf1 $19) 18... Bxf1 19. Rxf1 Bxf4 20. Nxf6+ Qxf6 $19) 17... Rc8 {[#]} (17... Re6 $11) 18. e3 (18. Bxh6 $1 $14 {stays ahead.} Ne4 19. Nxe4 Rxc1 20. Rxc1 (20. Qxc1 dxe4 21. Bg5 Qd7 $16) 20... dxe4 21. Be3) 18... Bxf4 (18... Bb4 $17) 19. Rxf4 $15 Rc6 20. Rcf1 Rce6 21. Kh1 (21. Re1 $15) 21... Rxe3 $17 22. Rxf6 gxf6 {[%cal Bg7f6,Bf6f5][%mdl 32]} 23. Nxd5 R3e6 {[%cal Be3e6,Be6d6,Bd6d4][%mdl 32]} ({Don't take} 23... Re2 24. Qxh6 R8e6 25. Nxf6+ Rxf6 26. Qxf6 (26. Rxf6 Re1+ 27. Rf1 Rxf1+ 28. Bxf1 Bf3+ 29. Bg2 Bxg2+ 30. Kxg2 Qxd4 $14) 26... Qxf6 27. Rxf6 $16) 24. Qxh6 (24. Nf4 $17 {was called for.} Rd6 25. d5) 24... f5 $19 25. Qc1 Rd6 26. Nf4 (26. Nc3 {was worth a try.}) 26... Rxd4 27. Bxb7 Re7 28. Bg2 Rd2 {White must now prevent ...Be2.} 29. h3 {[#]} (29. Qc3 $142 Rc7 30. Qe3) 29... Rd1 $1 30. Qc3 {[#]} (30. Qc4 Rxf1+) 30... Be2 (30... Rc7 $1 $19 31. Qe3 Rxf1+ 32. Bxf1 {[#]} Qd1 $1) 31. Rxd1 $11 {Really sharp!} Qxd1+ 32. Kh2 Ba6 $2 {[%mdl 8192]} (32... Qd6 $11 {and Black has nothing to worry.}) 33. Qf6 $18 {[%csl LRa6,LRe7,LRf5]} Re6 34. Nxe6 {Weighted Error Value: White=0.26 (precise) /Black=0.49} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.16"]
[White "Hlavina, Matous"]
[Black "Kulhanek, Tomas"]
[Result "0-1"]
[ECO "C10"]
[WhiteElo "2125"]
[BlackElo "2323"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,96,25,17,22,24,26,19,22,0,0,-8,-6,0,0,-2,0,0,0,-65,-64,-56,-29,-24,0,0,0,-25,0,-4,0,-8,-9,-68,-71,-81,-22,-150,-157,-192,-116,-195,-189,-191,-116,-107,-102,-108,-80,-84,-78,-173,-164,-230,-213,-200,-230,-236,-217,-231,-231,-277,-277,-295,-293,-310,-303,-303,-303,-303,-275,-303,-303,-362,-308,-534,-554,-546,-541,-657,-602,-747,-726,-1025,-966]} 1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bd3 Ngf6 6. Nf3 Nxe4 {6...Nxe4 has become a bit dusty these days.} 7. Bxe4 Nf6 8. Bg5 Qd6 {C10: French with 3 Nc3: Unusual Black 3rd moves and 3...dxe4.} 9. Bxf6 {is the legacy move (9.Bd3).} gxf6 10. Qe2 Bd7 {The position is equal.} 11. O-O-O O-O-O 12. Kb1 f5 13. Bd3 Bg7 14. Rhe1 Bc6 15. c3 {[#]} Qf4 $146 ({Predecessor:} 15... Bf6 16. g3 Kb8 17. Ne5 Bxe5 18. Qxe5 Qxe5 19. Rxe5 Rd5 20. Rde1 Rhd8 21. Kc2 a6 {½-½ (84) Kosintseva,T (2539)-Xu,Y (2485) Sochi 2009}) 16. h3 (16. Qe3 $11 Qg4 17. Rg1) 16... Rhg8 17. Rg1 Bf6 {[%cal Og8g2]} 18. Ne1 Qh2 19. Nf3 Qf4 {[%cal Og8g2]} 20. Ne1 Rg7 21. g3 Qh6 22. Ng2 Qxh3 23. Nf4 ({White should try} 23. Ne3 $1 $11) 23... Qg4 $36 {[%mdl 2048] Keeping White busy.} 24. Qc2 Rgg8 (24... Bf3 $17 {White must now prevent ...Bg5.} 25. Be2 Bxe2 26. Nxe2 Kb8) 25. Qb3 (25. Be2 $11 {remains equal.} Qg5 26. d5 exd5 27. Bf3) 25... Bf3 $1 $17 {Strongly threatening ...Bg5.} 26. Rde1 {[#]} Kb8 (26... Bg5 $1 $19 {[%cal Rg5f4]} 27. Ne2 h5) 27. a4 (27. Be2 $17) 27... Bg5 $19 28. Ng2 Bd2 {A strong pair of Bishops.} ({Better is} 28... c5 $19 29. Ne3 Qh5) 29. Re5 $17 Bd5 30. Qc2 Bg5 {[%cal Oc7c5] Black is more active.} 31. Be2 Qh3 32. Rxd5 exd5 $19 ({Inferior is} 32... Rxd5 33. Bf3 $15) 33. Bf3 {[#]} (33. Ne1 {was worth a try.}) 33... f4 $1 34. Nxf4 Bxf4 35. Rh1 Qe6 36. gxf4 h6 37. a5 Qa6 38. b4 Qf6 39. Qd2 a6 40. Kb2 c6 41. Rh5 Ka7 42. Qe3 Rg1 43. f5 Rg5 44. Qe5 $2 (44. Rxg5 Qxg5 45. Qxg5 hxg5 46. Kb3) 44... Qxe5 {Black is clearly winning.} 45. dxe5 Re8 46. e6 fxe6 {Threatens to win with ...Rf8.} 47. Rxg5 hxg5 48. Bh5 Rh8 {Weighted Error Value: White=0.41/Black=0.11 (very precise)} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.17"]
[White "Pham, Khoi"]
[Black "Acor, Corey"]
[Result "0-1"]
[ECO "C62"]
[WhiteElo "2114"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,68,25,75,75,73,71,95,81,84,82,109,79,75,47,53,48,71,54,94,83,83,54,54,49,48,44,58,57,77,77,76,59,83,83,85,81,82,-20,-20,-36,-56,-104,0,0,0,-97,0,-131,-131,-130,-130,-126,-128,-563,-562,-688,-693,-681,-672,-613,-489]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} Bd7 5. Nc3 Nge7 (5... exd4 $11 {keeps the balance.} 6. Nxd4 Be7) 6. d5 $16 {C62: Ruy Lopez: Steinitz Defence.} Nb8 7. Be2 g6 8. Be3 {White is better.} Bg7 9. Qd2 {[#]} h6 $146 ({Predecessor:} 9... f5 10. g3 O-O 11. h4 f4 12. gxf4 exf4 13. Bxf4 Bg4 14. Ng5 Bd7 15. h5 Bf6 16. Nxh7 Kxh7 17. hxg6+ Kxg6 {1-0 (24) Satosuo,R (2002)-Azzi,R (1510) ICCF email 2019}) 10. h4 {[%cal Bh2h4,Bh4h5][%mdl 32]} f5 11. g3 {Inhibits f4.} fxe4 12. Nxe4 Nf5 13. O-O-O a5 14. h5 g5 15. Nh2 O-O 16. Ng4 {[%cal Re3g5]} Nxe3 17. Nxe3 Na6 18. c3 b6 19. Bd3 Qe8 20. Bb1 Rf3 21. Qc2 Qf7 22. Nd2 {Pair of Knights!} Rf6 (22... Rxf2 $2 23. Rdf1 Rf4 24. gxf4 $18) 23. g4 (23. Rdf1 $16) 23... Rxf2 $11 24. Rdf1 Rf4 $1 {Active counter play!} 25. Ng2 (25. Qh7+ $15 {might be stronger.} Kf8 26. Bf5) 25... Bxg4 ({Black should play} 25... Nc5 $17 26. Nxf4 exf4) 26. Nxf4 exf4 27. Qh7+ Kf8 28. Re1 (28. Rhg1 $1 $11 Bh3 29. Re1) 28... Nc5 $17 (28... Bxh5 $2 29. Rxh5 Nc5 30. Bg6 $18) 29. Bg6 Qxd5 {...Be6 is the strong threat. Chess con chili.} 30. Rhg1 {[%cal Oe1e7] Threatens to win with Re7!} Be6 {And now ...Bg8 would win.} (30... Qxa2 $2 {[#]} 31. Re7 $3 {[%mdl 512]} (31. Rxg4 Na4 $11) (31. Bb1 Qg8 $16) 31... Qg8 32. Rf7+ Qxf7 33. Bxf7 Kxf7 34. Rxg4 $18) 31. Re2 $2 {[%mdl 8192] White does not recover from this.} (31. Be4 $17 {was the crucial defense.} Nxe4 32. Rxe4) 31... Bg8 $19 {Black is clearly winning.} ({Not} 31... Qxa2 32. Rge1 Rd8 33. Rxe6 Nxe6 34. Bb1 $11) 32. Rge1 {[#] Intending Re8+ and mate.} Nd3+ $1 {[%mdl 512]} 33. Bxd3 {aiming for Qg6.} Bxh7 34. Bxh7 Rd8 {Weighted Error Value: White=0.43/Black=0.09 (flawless)} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.18"]
[White "Unneland, Mathias"]
[Black "Kukucka, Matej"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2262"]
[BlackElo "2104"]
[Annotator "TA"]
[PlyCount "104"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,104,23,31,20,29,29,31,30,37,9,18,0,0,7,0,0,0,0,0,0,10,0,8,18,9,-16,-15,-8,-14,-17,0,-15,0,0,0,0,0,-25,0,0,0,0,0,-5,-5,-13,-19,-8,-16,-58,-10,-35,-7,-22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,8,8,8,0,0]} 1. c4 e6 2. d4 d5 3. Nf3 a6 4. cxd5 exd5 5. Nc3 c6 6. Qc2 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6.} Nf6 7. Bg5 Be6 8. e3 {White is slightly better.} h6 9. Bh4 Nbd7 10. Bd3 Bd6 11. O-O O-O 12. Bg3 Bxg3 13. hxg3 Re8 {[#]} 14. Rfc1 $146 ({Predecessor:} 14. Qd2 Qb8 15. Rac1 Qd6 16. a3 a5 17. Qc2 b5 18. a4 b4 19. Ne2 Rac8 20. Nf4 {½-½ (40) Lundin,J (2114)-Raja,R (2408) Belgrade 2021}) 14... Rc8 15. Rab1 c5 16. dxc5 Nxc5 17. Bf5 Nce4 18. Bxe6 fxe6 19. Qb3 Qe7 20. Rc2 Nxc3 21. Rxc3 Ne4 22. Rc2 Rc7 23. Nd2 Rxc2 (23... Nxd2 {keeps more tension.} 24. Rxd2 Rc4 25. Qd3 Rec8 26. Re1 Qg5) 24. Qxc2 Nxd2 25. Qxd2 $11 {[%mdl 4096] Endgame KQR-KQR} Rc8 26. e4 Qc5 27. Rd1 dxe4 28. Qd7 {[%csl LRb7,LRe6]} Qc6 29. Qd4 (29. Qe7 $11) 29... Qc2 (29... Qd5 $15 30. Qa4 Qf5) 30. Re1 Qd3 (30... Rf8 $5 {[%cal Re6e5]}) 31. Qb4 {The position is equal.} e3 (31... Rc2 {is interesting.} 32. Qxb7 e3 33. fxe3 Kh7 34. a3 a5) 32. Rxe3 Rc1+ 33. Re1 Rxe1+ 34. Qxe1 {KQ-KQ} Qd5 35. a3 Kf7 36. Qe2 Ke7 37. Qg4 Kf6 38. Qe2 Qb3 39. Qd2 Qb5 40. Qd4+ Kf7 41. g4 Qc6 42. Kh2 Qb5 43. Kg3 e5 44. Qc3 Qd5 45. Kh2 e4 46. a4 Qd6+ 47. g3 Qd5 {Prevents Qb3.} 48. Qc2 g5 49. Qc7+ Kg6 50. Qe7 Qd4 51. Qe6+ Kg7 52. Qe7+ Kg6 {Weighted Error Value: White=0.06 (flawless) /Black=0.05 (flawless)} 1/2-1/2

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.19"]
[White "Lorans, Sylvain"]
[Black "Macicek, Jakub"]
[Result "1-0"]
[ECO "E20"]
[WhiteElo "2110"]
[BlackElo "2250"]
[Annotator "RC"]
[PlyCount "67"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:03]} Nf6 {[%emt 0:00:18]} 2. c4 {[%emt 0:00:05]} e6 {[%emt 0:00:15]} 3. Nc3 {[%emt 0:00:07]} Bb4 {[%emt 0:00:29]} 4. f3 {[%emt 0:00:08]} c5 {[%emt 0:04:41]} 5. d5 {[%emt 0:00:06]} b5 {[%emt 0:02:05]} 6. e4 {[%emt 0:00:09]} d6 {[%emt 0:00:54]} 7. Bd2 {[%emt 0:02:30]} a6 {[%emt 0:09:29]} 8. a4 {[%emt 0:01:41]} bxa4 {[%emt 0:18:15]} 9. Qxa4+ {[%emt 0:02:01]} Bd7 {[%emt 0:02:14]} 10. Qc2 {[%emt 0:01:01]} e5 {[%emt 0:00:17]} 11. Bd3 {[%emt 0:03:31]} Ng8 {[%emt 0:11:19]} 12. Nge2 {[%emt 0:07:39]} Ne7 {[%emt 0:00:08]} 13. O-O {[%emt 0:01:09]} Ng6 {[%emt 0:00:12]} 14. f4 {[%emt 0:10:36]} exf4 {[%emt 0:00:08]} 15. Nxf4 {[%emt 0:00:04]} Ne5 {[%emt 0:02:14]} 16. Be2 {[%emt 0:09:35]} Bc8 {[%emt 0:09:43]} 17. Qc1 {[%emt 0:03:15]} O-O {[%emt 0:11:07]} 18. Nh5 {[%emt 0:02:08]} f6 {[%emt 0:02:21]} 19. Qe1 {[%emt 0:04:11]} Ra7 {[%emt 0:02:24]} 20. Qg3 {[%emt 0:03:56]} Kh8 21. Bf4 {[%emt 0:06:26]} g6 {[%emt 0:11:23]} 22. Nb5 {[%emt 0:03:17]} Raf7 {[%emt 0:03:00]} 23. Nxd6 {[%emt 0:01:40]} Qxd6 {[%emt 0:00:49]} 24. Nxf6 {[%emt 0:00:06]} Nbc6 {[%emt 0:05:11]} 25. dxc6 {[%emt 0:01:51]} Qd4+ {[%emt 0:00:08]} 26. Kh1 {[%emt 0:05:04]} Nxc6 {[%emt 0:00:07]} 27. Bh6 {[%emt 0:06:01]} Rd8 {[%emt 0:00:25]} 28. Rad1 {[%emt 0:02:46]} Qxb2 {[%emt 0:00:34]} 29. Rxd8+ {[%emt 0:00:11]} Nxd8 {[%emt 0:00:06]} 30. Qd6 {[%emt 0:02:34]} Ba5 {[%emt 0:03:47]} 31. Ne8 {[%emt 0:02:44]} Rxf1+ {[%emt 0:00:46]} 32. Bxf1 {[%emt 0:00:03]} Ne6 {[%emt 0:00:45]} 33. Bg7+ {[%emt 0:00:23]} Nxg7 {[%emt 0:00:11]} 34. Qf8# {[%emt 0:00:06]} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.20"]
[White "Vales, Vaclav"]
[Black "Torngren, Gustav"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2106"]
[BlackElo "2228"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,80,1,-6,-3,-31,-13,-52,-47,-48,-51,-60,-48,-47,-25,-37,0,-89,-25,-20,-20,-31,-16,-41,-32,-41,-31,-31,-23,-30,-26,-54,-28,-14,0,0,6,9,77,4,11,0,0,0,0,-8,17,5,0,-77,-77,-75,-75,-421,-400,-413,-414,-418,-423,-420,-411,-433,-430,-508,-492,-522,-520,-522,-519,-566,-535]} 1. Nf3 e6 2. g3 d5 3. Bg2 Be7 4. d3 b6 5. c4 Bb7 6. Nbd2 Nf6 7. O-O O-O {A05: Réti Opening: 1 Nf3 Nf6.} 8. h3 {[#]} d4 $146 ({Predecessor:} 8... c5 9. b3 Nc6 10. a3 Qc7 11. Nb1 h6 12. Nc3 d4 13. Nb5 Qd7 14. a4 a6 {0-1 (26) Solomin,D-Kapkan,E (1939) Vladivostok 2008}) 9. Ne5 Bxg2 {Black is slightly better.} 10. Kxg2 Nfd7 11. Ndf3 Nxe5 12. Nxe5 Bf6 13. Ng4 Be7 (13... c5 {is more complex.} 14. e4 dxe3 15. Qf3 e2 16. Re1 Na6) 14. Qa4 (14. Ne5 $11) 14... Qd7 ({Black should try} 14... c5 $17) 15. Qxd7 $11 Nxd7 16. Bd2 a5 17. b3 Ba3 18. Nh2 e5 19. Nf3 Bb4 20. Rfd1 Rfe8 21. e4 dxe3 22. Bxe3 a4 23. d4 e4 24. Ng1 Ra6 {[#]} (24... axb3 $11 25. axb3 f5) 25. Ne2 (25. a3 $1 $16 {[%cal Ra3b4]} Bc3 26. Rab1 axb3 27. Rxb3) 25... Rea8 26. Rab1 {[%cal Oa2a3]} axb3 27. axb3 Ra2 $36 {[%mdl 2048] Black is pushing.} 28. Kf1 h6 29. g4 Nf6 {[%cal Bd7f6,Bf6h5,Bh5f4,Bf4h3][%mdl 32]} 30. g5 (30. Ng3 $11) 30... hxg5 $17 {Black is more active.} 31. Bxg5 Nh5 32. Bf4 $2 {[%mdl 8192] [#] White does not recover from this.} (32. d5 $17) 32... Rxe2 $1 $19 {[%mdl 512]} 33. Kxe2 Nxf4+ 34. Ke3 Nxh3 35. Ra1 Rd8 36. Ra7 Bd6 {Black is clearly winning.} 37. Rda1 Ng5 38. Ra8 Rxa8 39. Rxa8+ Kh7 40. Rc8 f5 {Weighted Error Value: White=0.46/Black=0.15 (very precise)} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.21"]
[White "Thompson, Ian D"]
[Black "Bochnicka, Vladimir"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2095"]
[BlackElo "2222"]
[Annotator "RC"]
[PlyCount "74"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. Nf3 {[%emt 0:00:04]} f5 {[%emt 0:00:08]} 2. d4 {[%emt 0:02:09]} Nf6 {[%emt 0:00:08]} 3. Bg5 {[%emt 0:04:37]} e6 {[%emt 0:00:26]} 4. Nbd2 {[%emt 0:00:40]} Be7 {[%emt 0:00:24]} 5. Bxf6 {[%emt 0:06:32]} Bxf6 {[%emt 0:00:09]} 6. e4 {[%emt 0:00:09]} O-O {[%emt 0:00:30]} 7. Bd3 {[%emt 0:00:38]} d5 {[%emt 0:00:31]} 8. e5 {[%emt 0:01:59]} Be7 {[%emt 0:00:13]} 9. Qe2 {[%emt 0:04:45]} b6 {[%emt 0:04:14]} 10. O-O {[%emt 0:08:59]} c5 {[%emt 0:03:45]} 11. c3 {[%emt 0:03:52]} Bd7 {[%emt 0:02:01]} 12. a3 {[%emt 0:05:18]} Nc6 {[%emt 0:02:32]} 13. b4 {[%emt 0:06:24]} Be8 {[%emt 0:02:30]} 14. Rfe1 {[%emt 0:12:24]} Bh5 {[%emt 0:06:23]} 15. dxc5 {[%emt 0:12:51]} bxc5 {[%emt 0:02:05]} 16. bxc5 {[%emt 0:00:11]} Bxc5 {[%emt 0:01:31]} 17. Nb3 {[%emt 0:00:59]} Bb6 {[%emt 0:03:44]} 18. c4 {[%emt 0:01:41]} Bc7 {[%emt 0:10:10]} 19. Nc5 {[%emt 0:08:07]} Nd4 {[%emt 0:22:10]} 20. Qe3 {[%emt 0:01:03]} Nxf3+ {[%emt 0:01:22]} 21. gxf3 {[%emt 0:00:03]} f4 {[%emt 0:00:18]} 22. Qe2 {[%emt 0:00:46]} Qe7 {[%emt 0:00:56]} 23. Nxe6 {[%emt 0:02:33]} Qxe6 {[%emt 0:00:51]} 24. cxd5 {[%emt 0:00:08]} Qh3 {[%emt 0:01:01]} 25. Qf1 {[%emt 0:00:53]} Qh4 {[%emt 0:05:56]} 26. Qg2 {[%emt 0:02:21]} Bb6 {[%emt 0:10:46]} 27. d6 {[%emt 0:02:26]} Bg6 {[%emt 0:02:21]} 28. Bc4+ {[%emt 0:05:50]} Kh8 {[%emt 0:00:53]} 29. e6 {[%emt 0:03:33]} Bf5 {[%emt 0:04:17]} 30. e7 {[%emt 0:02:38]} Bh3 {[%emt 0:00:22]} 31. exf8=Q+ {[%emt 0:00:47]} Rxf8 {[%emt 0:00:06]} 32. Re2 {[%emt 0:00:33]} Bxg2 {[%emt 0:00:21]} 33. Kxg2 {[%emt 0:00:03]} Qg5+ {[%emt 0:01:14]} 34. Kf1 {[%emt 0:00:03]} Qh6 {[%emt 0:01:59]} 35. Re6 {[%emt 0:00:30]} Qxh2 {[%emt 0:00:38]} 36. Ra2 {[%emt 0:00:10]} Qh1+ {[%emt 0:02:14]} 37. Ke2 {[%emt 0:00:02]} Ba5 {[%emt 0:01:15]} 0-1

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.22"]
[White "Michalczak, Thomas"]
[Black "Mach, Petr"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2218"]
[BlackElo "2090"]
[Annotator "RC"]
[PlyCount "203"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {[%emt 0:00:02]} d5 {[%emt 0:00:02]} 2. exd5 {[%emt 0:00:25]} Nf6 {[%emt 0:00:04]} 3. d4 {[%emt 0:00:08]} Nxd5 {[%emt 0:00:04]} 4. c4 {[%emt 0:00:05]} Nb6 {[%emt 0:00:03]} 5. Nf3 {[%emt 0:00:06]} g6 {[%emt 0:00:01]} 6. h3 {[%emt 0:00:07]} Bg7 {[%emt 0:00:06]} 7. Nc3 {[%emt 0:00:06]} O-O {[%emt 0:00:04]} 8. Be3 {[%emt 0:00:05]} Nc6 {[%emt 0:00:05]} 9. Be2 {[%emt 0:00:05]} e5 {[%emt 0:00:04]} 10. d5 {[%emt 0:00:05]} Ne7 {[%emt 0:00:03]} 11. g4 {[%emt 0:00:06]} f5 {[%emt 0:00:26]} 12. Qb3 {[%emt 0:00:06]} fxg4 {[%emt 0:20:30]} 13. hxg4 {[%emt 0:01:33]} Bxg4 {[%emt 0:01:28]} 14. Ng5 {[%emt 0:00:10]} Bxe2 {[%emt 0:00:06]} 15. Nxe2 {[%emt 0:07:35]} Nf5 {[%emt 0:06:27]} 16. Rxh7 {[%emt 0:16:04]} Qf6 {[%emt 0:09:47]} 17. Ne4 {[%emt 0:06:55]} Qf7 {[%emt 0:09:47]} 18. O-O-O {[%emt 0:01:07]} Nxe3 {[%emt 0:00:17]} 19. fxe3 {[%emt 0:00:39]} Qf3 {[%emt 0:07:25]} 20. N2g3 {[%emt 0:23:23]} Nxc4 {[%emt 0:06:27]} 21. Rxg7+ {[%emt 0:03:47]} Kxg7 {[%emt 0:00:09]} 22. Qxc4 {[%emt 0:00:15]} Qxe3+ {[%emt 0:00:13]} 23. Kc2 {[%emt 0:06:10]} Rf7 {[%emt 0:05:23]} 24. Rd3 {[%emt 0:02:11]} Qf4 {[%emt 0:05:24]} 25. d6 {[%emt 0:09:16]} cxd6 {[%emt 0:00:16]} 26. Qe6 {[%emt 0:00:20]} Rc7+ {[%emt 0:03:08]} 27. Kb3 {[%emt 0:01:35]} Qf7 {[%emt 0:04:44]} 28. Ng5 {[%emt 0:00:20]} Qd7 {[%emt 0:02:09]} 29. a4 {[%emt 0:08:34]} Re8 {[%emt 0:02:22]} 30. Qxd6 {[%emt 0:00:56]} Qxd6 {[%emt 0:01:26]} 31. Rxd6 {[%emt 0:00:23]} Kh6 {[%emt 0:03:00]} 32. N3e4 {[%emt 0:01:04]} Ree7 {[%emt 0:05:35]} 33. Rd1 {[%emt 0:03:05]} Rc6 {[%emt 0:02:58]} 34. Rh1+ {[%emt 0:03:24]} Kg7 {[%emt 0:00:04]} 35. Rh7+ {[%emt 0:02:11]} Kf8 {[%emt 0:00:06]} 36. Rh8+ {[%emt 0:00:05]} Kg7 {[%emt 0:00:04]} 37. Rh7+ {[%emt 0:00:06]} Kf8 {[%emt 0:00:03]} 38. Rh8+ {[%emt 0:00:13]} Kg7 {[%emt 0:00:23]} 39. Rh2 {[%emt 0:00:09]} Kf8 {[%emt 0:03:21]} 40. Rf2+ {[%emt 0:00:35]} Kg7 {[%emt 0:01:26]} 41. Kb4 {[%emt 0:31:23]} Rec7 {[%emt 0:32:47]} 42. Rh2 {[%emt 0:00:34]} Kg8 {[%emt 0:00:00]} 43. Rh6 {[%emt 0:00:00]} Rd7 {[%emt 0:00:00]} 44. Rh2 {[%emt 0:00:00]} Rd4+ {[%emt 0:00:00]} 45. Ka3 {[%emt 0:00:00]} Rcc4 {[%emt 0:00:00]} 46. b3 {[%emt 0:00:00]} Rxe4 {[%emt 0:00:00]} 47. bxc4 {[%emt 0:00:00]} Rxc4 {[%emt 0:00:00]} 48. Re2 {[%emt 0:00:00]} a6 {[%emt 0:00:00]} 49. Rxe5 {[%emt 0:00:00]} b5 {[%emt 0:00:00]} 50. axb5 {[%emt 0:00:00]} axb5 {[%emt 0:00:00]} 51. Rxb5 {[%emt 0:00:00]} Kg7 {[%emt 0:00:00]} 52. Kb3 {[%emt 0:00:00]} Rc8 {[%emt 0:00:00]} 53. Ne4 {[%emt 0:00:00]} Rf8 {[%emt 0:00:00]} 54. Kc3 {[%emt 0:00:00]} Rf5 {[%emt 0:00:00]} 55. Rb6 {[%emt 0:00:00]} Kh6 {[%emt 0:00:00]} 56. Kd4 {[%emt 0:00:00]} Ra5 {[%emt 0:00:00]} 57. Ke3 {[%emt 0:00:00]} Ra1 {[%emt 0:00:00]} 58. Kf4 {[%emt 0:00:00]} Rf1+ {[%emt 0:00:00]} 59. Kg4 {[%emt 0:00:00]} Rf5 {[%emt 0:00:00]} 60. Nf6 {[%emt 0:00:00]} Kg7 {[%emt 0:00:00]} 61. Ne4 {[%emt 0:00:00]} Kh6 {[%emt 0:00:00]} 62. Ng3 {[%emt 0:00:00]} Ra5 {[%emt 0:00:00]} 63. Kf4 {[%emt 0:00:00]} Rc5 {[%emt 0:00:00]} 64. Rb1 {[%emt 0:00:00]} Ra5 {[%emt 0:00:00]} 65. Rh1+ {[%emt 0:00:00]} Kg7 {[%emt 0:00:00]} 66. Ne4 {[%emt 0:00:00]} Rh5 {[%emt 0:00:00]} 67. Ra1 {[%emt 0:00:00]} Rf5+ {[%emt 0:00:00]} 68. Kg4 {[%emt 0:00:00]} Kh6 {[%emt 0:00:00]} 69. Ra7 {[%emt 0:00:00]} Rb5 {[%emt 0:00:22]} 70. Kg3 {[%emt 0:02:40]} Rb3+ {[%emt 0:00:39]} 71. Kf4 {[%emt 0:00:16]} Rb5 {[%emt 0:00:36]} 72. Kg4 {[%emt 0:00:05]} Rb4 {[%emt 0:00:30]} 73. Re7 {[%emt 0:00:08]} Ra4 {[%emt 0:00:23]} 74. Kf4 {[%emt 0:00:51]} Ra5 {[%emt 0:01:02]} 75. Nf2 {[%emt 0:00:28]} Rf5+ {[%emt 0:00:31]} 76. Kg3 {[%emt 0:00:07]} Ra5 {[%emt 0:00:18]} 77. Kh4 {[%emt 0:01:42]} Rh5+ {[%emt 0:01:46]} 78. Kg3 {[%emt 0:00:07]} Ra5 {[%emt 0:00:07]} 79. Nh3 {[%emt 0:00:08]} Ra3+ {[%emt 0:00:56]} 80. Kg4 {[%emt 0:00:07]} Ra5 {[%emt 0:00:15]} 81. Re6 {[%emt 0:00:47]} Rb5 {[%emt 0:01:07]} 82. Nf4 {[%emt 0:00:20]} Rg5+ {[%emt 0:00:15]} 83. Kh4 {[%emt 0:00:32]} Rg1 {[%emt 0:00:17]} 84. Ra6 {[%emt 0:02:13]} Kh7 {[%emt 0:00:27]} 85. Ne6 {[%emt 0:00:25]} Kh6 {[%emt 0:00:18]} 86. Ra8 {[%emt 0:01:02]} Rh1+ {[%emt 0:01:39]} 87. Kg4 {[%emt 0:00:08]} Rg1+ {[%emt 0:00:08]} 88. Kf4 {[%emt 0:00:13]} Rf1+ {[%emt 0:00:24]} 89. Kg3 {[%emt 0:00:08]} Kh7 {[%emt 0:00:39]} 90. Ra6 {[%emt 0:03:48]} Kh6 {[%emt 0:01:30]} 91. Ra4 {[%emt 0:01:50]} Rf5 {[%emt 0:01:07]} 92. Ra8 {[%emt 0:01:03]} Kh7 {[%emt 0:01:13]} 93. Kg4 {[%emt 0:00:15]} Rf1 {[%emt 0:02:04]} 94. Ng5+ {[%emt 0:00:32]} Kg7 {[%emt 0:00:14]} 95. Ra7+ {[%emt 0:00:04]} Kg8 {[%emt 0:00:23]} 96. Ne6 {[%emt 0:00:30]} Rf6 {[%emt 0:02:17]} 97. Re7 {[%emt 0:00:09]} Rf1 {[%emt 0:00:32]} 98. Kg5 {[%emt 0:00:28]} Rg1+ {[%emt 0:01:56]} 99. Kf6 {[%emt 0:00:26]} Kh8 {[%emt 0:00:09]} 100. Re8+ {[%emt 0:00:26]} Kh7 {[%emt 0:00:14]} 101. Ng5+ {[%emt 0:00:04]} Kh6 102. Rh8# 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.23"]
[White "Jordanov, Mihail"]
[Black "Kudrytskyi, Stanislav"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2193"]
[BlackElo "2057"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,116,42,76,76,60,40,55,54,54,55,64,28,27,27,20,0,0,0,0,0,0,-20,0,0,8,0,2,0,5,0,16,15,22,10,30,3,8,15,58,26,39,39,59,0,42,29,33,15,70,38,51,17,33,22,48,23,47,59,115,122,137,143,213,206,258,134,147,0,242,0,111,21,206,0,0,3,197,203,202,179,200,195,273,272,283,284,283,277,270,269,529,515,795,787,768,758,748,743,29999]} 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. a4 O-O 7. O-O c6 8. Re1 b6 9. h3 Bb7 10. Ba2 a6 {[#]} 11. Nh4 $1 {White is more active. C41: Philidor Defence.} g6 12. Bh6 Re8 13. Nf3 {aiming for Ng5. White is slightly better.} Bf8 14. Bxf8 Nxf8 15. dxe5 dxe5 16. Ng5 Re7 {[#]} 17. Qf3 $146 ({Predecessor:} 17. Re3 h6 18. Rd3 Qe8 19. Nf3 Rd7 20. Rxd7 N8xd7 21. Qd6 Qb8 22. Rd1 Qxd6 23. Rxd6 {1-0 (71) Kriebel,T (2465)-Svatos,J (2293) Czech Republic 2015}) 17... Kg7 18. Rad1 Qc7 19. Qe3 a5 20. g3 Bc8 21. Kg2 Ne6 22. Nxe6+ Bxe6 23. Bxe6 Rxe6 24. Qd2 Rae8 25. Re3 Qe7 26. b3 Qb4 27. f3 R8e7 28. Rd3 Re8 (28... Rd7 $11 {should be considered.}) 29. Qe3 Rb8 30. R1d2 Qe7 31. Rd1 Qb4 32. h4 h5 33. R1d2 Qe7 (33... Rb7 $11) 34. Qg5 Qb4 35. Rd1 (35. Nd1 $5 {[%cal Rd1e3]}) 35... Nh7 36. Qd2 Nf6 (36... Ree8 {is more complex.} 37. Rd6 Qc5 38. Nb1 Nf8 39. Qf2 Qxf2+ 40. Kxf2 Rec8) 37. Nb1 {[%cal Bc3b1,Bb1d2,Bd2c4][%mdl 32]} Qc5 38. Qc3 {Qxc5 is the strong threat.} Qe7 (38... Qb4 $14) 39. Nd2 $16 Kf8 40. Nc4 Qc5 (40... Qc7 $16 41. Rd6 Rbe8) 41. Qd2 Kg7 42. Qf2 (42. Rd6 $18) 42... Qb4 43. Qd2 (43. Rd6 $16 {Threatens to win with Rxe6.} Rxd6 44. Nxd6 (44. Rxd6 b5 $17)) 43... Qc5 $1 $18 44. Qc3 $2 ({Better is} 44. Rd6 $18) 44... Ra8 (44... Kf8 $1 $11) 45. Rd6 (45. Ra1 $16) 45... Rae8 $2 (45... Nd5 $1 $11 {and Black is okay.} 46. R6xd5 (46. exd5 Rxd6 47. Qxe5+ Rf6 $15) 46... cxd5 47. Rxd5 (47. exd5 Rd8 $11) 47... Qc6) 46. Qe3 $2 (46. Rxe6 $18 Rxe6 47. Qd2) 46... Qxe3 $11 47. Nxe3 {Hoping for Rxe6.} b5 $2 (47... Nd5 $1 $11 48. R6xd5 cxd5) 48. Rxe6 $18 Rxe6 {[%mdl 4096] Endgame [#] KRN-KRN} 49. Ra1 $1 bxa4 50. Rxa4 Rd6 (50... Ne8 $142 51. Nc4 (51. Rxa5 Nd6 $16) 51... Nd6 52. Nxa5 (52. Rxa5 Nxc4 53. bxc4 c5 $16) 52... Nb5) 51. Rxa5 Nd7 52. Nc4 Rd1 53. Kf2 {Strongly threatening Ra7.} Kf8 54. Ra6 (54. Nxe5 Nxe5 55. Rxe5 Rd2+ 56. Ke3 Rxc2 $16) 54... c5 $2 (54... Rc1 {keeps fighting.} 55. Ne3 (55. Rxc6 Rxc2+ 56. Kf1 Rc1+ 57. Ke2 Rg1 $16) 55... Nc5) 55. Ra8+ Ke7 (55... Kg7 $142 56. Ra7 Kf6) 56. Ne3 Rd2+ 57. Ke1 Rd6 58. Nd5+ Ke6 59. Re8# {Weighted Error Value: White=0.31/Black=0.47} 1-0

[Event "20th Prague Open 2022"]
[Site "Prague"]
[Date "2022.01.09"]
[Round "4.24"]
[White "Grutter, Tim"]
[Black "Zadrapa, Radek"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2194"]
[BlackElo "2021"]
[Annotator "NA RC"]
[PlyCount "91"]
[EventDate "2022.01.07"]
[EventType "swiss"]
[EventCountry "CZE"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {[%emt 0:00:05]} c5 {[%emt 0:00:05]} 2. Nf3 {[%emt 0:00:09]} d6 {[%emt 0:00:04]} 3. d4 {[%emt 0:00:05]} cxd4 {[%emt 0:00:02]} 4. Nxd4 {[%emt 0:00:05]} Nf6 {[%emt 0:00:03]} 5. Nc3 {[%emt 0:00:05]} a6 {[%emt 0:00:04]} 6. h4 {[%emt 0:00:39]} b5 {[%emt 0:02:26]} 7. a4 {[%emt 0:00:25]} b4 {[%emt 0:08:07]} 8. Nd5 {[%emt 0:00:49]} e6 {[%emt 0:08:41]} 9. Nxf6+ {[%emt 0:01:52]} Qxf6 {[%emt 0:02:28]} 10. Bg5 {[%emt 0:06:23]} Qe5 {[%emt 0:01:45]} 11. Bd3 {[%emt 0:04:47]} Nd7 {[%emt 0:03:11]} 12. Nf3 {[%emt 0:07:41]} Qxb2 {[%emt 0:04:32]} 13. O-O {[%emt 0:01:00]} h6 {[%emt 0:01:33]} 14. Bd2 {[%emt 0:06:41]} Be7 {[%emt 0:07:02]} 15. Qe2 {[%emt 0:06:11]} Qf6 {[%emt 0:05:45]} 16. Bxb4 {[%emt 0:03:27]} O-O $16 {[%emt 0:02:27]} ({Black should play} 16... e5 $14) 17. e5 {[%emt 0:02:56]} Qf4 {[%emt 0:02:52]} 18. exd6 {[%emt 0:07:44]} Qxb4 {[%emt 0:10:13]} 19. dxe7 {[%emt 0:00:30]} Re8 {[%emt 0:00:07]} 20. Rfb1 {[%emt 0:09:12]} Qg4 {[%emt 0:03:57]} 21. Qe3 {[%emt 0:04:22]} Nf6 {[%emt 0:03:56]} 22. Qc5 {[%emt 0:09:01]} Bd7 {[%emt 0:04:14]} 23. Rb4 {[%emt 0:02:44]} Qh5 {[%emt 0:01:30]} 24. Qxh5 {[%emt 0:00:27]} Nxh5 {[%emt 0:00:06]} 25. Ne5 {[%emt 0:00:31]} Ra7 {[%emt 0:08:29]} 26. Nxd7 {[%emt 0:01:14]} Rxd7 {[%emt 0:00:09]} 27. Bxa6 {[%emt 0:00:12]} Rdxe7 {[%emt 0:00:11]} 28. Rb7 {[%emt 0:02:09]} Kf8 {[%emt 0:00:18]} 29. Rab1 {[%emt 0:02:16]} Ra8 {[%emt 0:02:19]} 30. Rxe7 {[%emt 0:02:06]} Kxe7 {[%emt 0:00:05]} 31. Rb7+ {[%emt 0:00:09]} Kd6 {[%emt 0:00:41]} 32. Bb5 {[%emt 0:00:24]} f5 {[%emt 0:00:26]} 33. c4 {[%emt 0:01:53]} Ra5 {[%emt 0:02:44]} 34. Rb6+ {[%emt 0:01:53]} Ke7 {[%emt 0:00:44]} 35. c5 {[%emt 0:00:11]} Nf6 {[%emt 0:00:28]} 36. Rb7+ {[%emt 0:00:11]} Kd8 {[%emt 0:01:20]} 37. Rxg7 {[%emt 0:00:11]} Ne4 {[%emt 0:00:15]} 38. c6 {[%emt 0:00:19]} Nc5 {[%emt 0:01:27]} 39. Rh7 {[%emt 0:01:32]} Nxa4 {[%emt 0:01:05]} 40. c7+ {[%emt 0:00:10]} Kc8 {[%emt 0:00:18]} 41. Bd7+ {[%emt 0:30:05]} Kxc7 {[%emt 0:30:08]} 42. Bxa4+ {[%emt 0:00:05]} Kd6 {[%emt 0:00:23]} 43. Be8 {[%emt 0:00:58]} Ra8 {[%emt 0:01:38]} 44. Bh5 {[%emt 0:00:33]} Ra4 {[%emt 0:00:12]} 45. g3 {[%emt 0:00:24]} f4 {[%emt 0:00:30]} 46. Rxh6 {[%emt 0:01:00]} 1-0

