[Event "Prague Festival Challengers 2020"] [Site "Prague"] [Date "2020.02.13"] [Round "2.4"] [White "Kriebel, Tadeas"] [Black "Piorun, Kacper"] [Result "0-1"] [ECO "E91"] [WhiteElo "2524"] [BlackElo "2611"] [Annotator "TA"] [PlyCount "106"] [EventDate "2020.02.12"] [EventType "tourn"] [EventCountry "CZE"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 16,106,14,-4,83,8,25,29,24,22,29,25,21,22,43,39,31,37,29,44,50,46,45,41,43,36,90,69,74,73,75,75,75,67,102,69,120,73,71,60,95,52,67,55,57,56,66,57,70,58,84,61,114,114,118,97,111,73,95,88,90,68,70,66,70,68,74,0,0,0,0,0,2,0,0,0,0,0,0,0,0,-140,-139,-169,-187,-185,-176,-249,-235,-29990,-29989,-29989,-29990]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Bg4 7. O-O Nfd7 8. h3 Bxf3 9. Bxf3 c5 {E91: King's Indian: Classical: 6 Be2, unusual replies including 6...c5 and 6...Bg4.} (9... Nc6 $11 {remains equal.}) 10. e5 {[#]} (10. d5 $1 $16) 10... cxd4 $146 (10... Nc6 {is interesting.} 11. exd6 cxd4 12. dxe7 Qxe7 13. Nd5 Qc5) ({Predecessor:} 10... Qc8 11. Nd5 Nc6 12. Bg5 f6 13. exf6 Nxf6 14. dxc5 dxc5 15. Re1 e6 16. Bxf6 Bxf6 17. Bg4 {1-0 (31) Bosnak,D-Cicek,F (1433) Antalya 2019}) 11. Bxb7 {Nd5 is the strong threat.} dxc3 {White has an edge.} 12. Bxa8 Nxe5 13. bxc3 Nxc4 14. Rb1 Nd7 15. Bd5 $36 {[%mdl 2048] Black is under pressure.} Ncb6 16. Bg5 h6 17. Be3 Qc7 18. Bb3 Nc5 19. Qf3 e6 20. c4 a5 ({Better is} 20... Rc8 $14) 21. Rfc1 Nbd7 22. Bc2 Ne5 23. Qe2 Nc6 24. a3 h5 25. Rd1 Rd8 (25... Bf6 $14) 26. f4 Bf6 27. Kh1 h4 28. Qf3 Kg7 29. Bf2 a4 30. Qg4 Rh8 31. Qe2 Na5 32. Rb5 Nab3 33. Qg4 Qe7 (33... Rh5 $14) 34. Rb6 Rd8 35. Qf3 Na5 36. Rb4 Rc8 37. Qe2 Nc6 38. Rb6 Qc7 39. Rb5 Na7 40. Rbb1 Nc6 41. Bxc5 (41. Qe1 $16) 41... dxc5 $11 42. Qe4 Kf8 43. Bxa4 {Strongly threatening Qxc6.} Nd4 44. Rb7 Qa5 $1 {[%cal Ra5a4]} 45. Bd7 Rc7 46. Rxc7 Qxc7 47. Bb5 Nf5 {White must now prevent ...Ng3+.} 48. Qf3 (48. Kg1 $1 $11) 48... Bd4 $1 $17 {[%mdl 1024] Black has strong compensation.} 49. a4 Be3 $1 50. Rd7 {[#]} Qb8 $1 51. Rb7 {[#]} (51. Rd3 $142 Ng3+ 52. Kh2 Bxf4 53. Kg1) 51... Qd8 $1 $19 {[%cal Rd8d2] ( -> ...Qd2)} 52. Kh2 $2 (52. Bd7 $19 Qf6 53. Rb1) 52... Qd4 53. Rd7 Bxf4+ {Accuracy: White = 69%, Black = 80%.} 0-1 [Event "Prague Festival Challengers 2020"] [Site "Prague"] [Date "2020.02.16"] [Round "5.5"] [White "Kriebel, Tadeas"] [Black "Esipenko, Andrey"] [Result "0-1"] [ECO "E04"] [WhiteElo "2524"] [BlackElo "2654"] [Annotator "TA"] [PlyCount "70"] [EventDate "2020.02.12"] [EventType "tourn"] [EventCountry "CZE"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,70,24,16,14,16,13,0,20,13,10,10,22,14,14,7,9,12,55,0,0,-6,0,0,0,0,0,-52,-41,-43,-28,-42,-34,-63,-32,-29,0,0,0,0,0,-54,-48,-51,-56,-52,-46,-65,-74,-121,-116,-160,-168,-330,-357,-377,-368,-368,-368,-518,-513,-554,-533]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 a6 6. Ne5 Bb4+ {E04: Open Catalan: 5 Nf3.} 7. Nc3 {[#] Threatens to win with Qa4+.} Nd5 8. O-O {Hoping for Nxd5.} O-O {The position is equal.} 9. Ne4 b5 10. b3 cxb3 11. axb3 Bb7 12. Nd3 {[#]} Bc3 $146 {[%mdl 2048] Black has the initiative.} ({Predecessor:} 12... Be7 13. Nec5 Bc6 14. Bb2 Nf6 15. e4 Bxc5 16. Nxc5 Nbd7 17. Nxd7 Nxd7 18. Bc3 Bb7 {0-1 (38) Harikrishna,P (2731)-Nakamura,H (2741) Kolkata 2019}) 13. Bg5 Qe8 14. Rc1 (14. Nxc3 $14 Nxc3 15. Qc2 Bxg2 16. Kxg2) 14... Bxd4 $11 15. Ndc5 Bxc5 $1 16. Nxc5 Bc6 17. e4 Nb6 18. Qc2 ({White should try} 18. Qg4 $11 f5 19. Qh4) 18... h6 $15 19. Be3 a5 20. Nd3 N6d7 21. Qb2 b4 22. Rfd1 e5 23. Nc5 Nf6 24. f3 Bb5 25. Nb7 (25. Bh3 $11) 25... Nbd7 $1 26. Ra1 Qe6 27. Nxa5 Rfb8 28. Qf2 Ne8 29. Rdc1 Ra6 {...Rba8 is the strong threat.} 30. Bf1 {[#]} Nd6 $1 {White must now prevent ...Rba8.} 31. Bxb5 $2 (31. Qd2 {was the only defense.}) 31... Rxb5 $19 ({Less strong is} 31... Nxb5 32. Nc4 $17) 32. Nc6 Rxa1 33. Rxa1 Qxb3 34. Qe2 (34. Bd2 $142) 34... Qc4 35. Ne7+ Kf8 {Accuracy: White = 61%, Black = 90%.} 0-1 [Event "Prague Festival Challengers 2020"] [Site "Prague"] [Date "2020.02.19"] [Round "7.5"] [White "Kriebel, Tadeas"] [Black "Nguyen, Thai Dai Van"] [Result "1/2-1/2"] [ECO "D43"] [WhiteElo "2524"] [BlackElo "2560"] [Annotator "TA"] [PlyCount "72"] [EventDate "2020.02.12"] [EventType "tourn"] [EventCountry "CZE"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 22,72,0,0,0,0,10,12,28,28,37,37,33,41,60,17,47,39,27,10,10,17,10,10,10,10,10,10,22,6,26,26,26,26,26,5,8,0,0,0,0,0,26,26,26,26,26,26,26,0,6,0,26]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c6 5. cxd5 exd5 6. Bf4 Bd6 7. Bxd6 Qxd6 8. e3 Bf5 9. Bd3 Bxd3 10. Qxd3 O-O 11. O-O Nbd7 12. h3 Rfe8 {D35: Queen's Gambit Declined: Exchange Variation.} 13. Nd2 Re6 14. b4 {[%cal Bb2b4,Bb4b5][%mdl 32] [#]} Rae8 $146 ({Predecessor:} 14... a6 15. a4 Rae8 16. b5 c5 17. dxc5 Nxc5 18. Qd4 Nfe4 19. Ndxe4 dxe4 20. Rad1 Qe5 21. Qxe5 Rxe5 {0-1 (52) Gauglitz,G (2413)-Krivoshey,S (2498) Germany 2003}) 15. b5 c5 16. dxc5 Nxc5 17. Qd4 Rc8 18. Rac1 Ree8 19. Rfd1 Red8 20. Nde4 (20. Nf3 {feels hotter.} a5 21. Ne2 Qb6 22. a4 Qd6 23. Qc3) 20... Nfxe4 21. Nxe4 Nxe4 22. Rxc8 Rxc8 {[#]} 23. Qxe4 $1 {[%mdl 512]} dxe4 24. Rxd6 $11 {[%mdl 4096] Endgame KR-KR} g6 25. Rd7 Rc2 26. a3 Ra2 27. Rxb7 Rxa3 28. Kh2 Kg7 29. Kg3 g5 30. h4 h6 31. Kg4 Kg6 32. h5+ Kf6 33. b6 axb6 34. Rxb6+ Kg7 35. Rb4 Ra5 36. Kg3 Re5 {Accuracy: White = 90%, Black = 85%.} 1/2-1/2 [Event "Prague Festival Challengers 2020"] [Site "Prague"] [Date "2020.02.21"] [Round "9.5"] [White "Kriebel, Tadeas"] [Black "Bartel, Mateusz"] [Result "1/2-1/2"] [ECO "A40"] [WhiteElo "2524"] [BlackElo "2639"] [Annotator "TA"] [PlyCount "100"] [EventDate "2020.02.12"] [EventType "tourn"] [EventCountry "CZE"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,100,28,35,37,40,14,25,8,12,4,51,47,38,42,45,0,0,0,14,4,4,4,5,11,13,-2,0,0,0,0,0,-41,0,0,0,0,4,12,12,-17,-17,-17,-17,-17,-20,-17,0,0,0,0,0,0,0,0,0,-3,0,-8,-8,-35,-35,-35,-35,-35,-35,-56,-13,-74,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,13,13,16,0,0,0,0]} 1. d4 e6 2. c4 b6 3. Nc3 Bb4 4. e3 Bb7 5. Nge2 f5 6. a3 {A40: Unusual replies to 1 d4.} Be7 7. Ng3 Nf6 8. d5 {White has an edge.} O-O 9. Be2 a5 10. Bf3 {[#]} Qc8 $146 ({Predecessor:} 10... Na6 11. d6 Bxf3 12. dxe7 Qxe7 13. Qxf3 Nc5 14. O-O Ng4 15. Qe2 Qh4 16. h3 Ne5 {1-0 (59) Golikov,D (2114)-Stoleriu,G (2247) Khanty-Mansiysk 2016}) 11. O-O Na6 12. dxe6 dxe6 13. e4 fxe4 14. Ngxe4 Nc5 15. Nxc5 Bxc5 16. Bxb7 Qxb7 17. Qe2 e5 18. Bg5 Bd4 19. Bxf6 Rxf6 20. Kh1 Raf8 {[%cal Rf6f2]} (20... Bxc3 $5 21. bxc3 Re8 $15) 21. Ne4 $1 {[%cal Re4f6]} Rf4 22. Rae1 $1 a4 23. f3 Qc6 24. g3 R4f7 25. h4 h6 26. Kg2 Rb8 27. Rb1 b5 28. b4 Qxc4 29. Qxc4 bxc4 30. Rbc1 Bb2 31. Rxc4 Bxa3 32. Rb1 Rd7 $36 {[%mdl 2048] Black fights for an advantage.} 33. b5 Rd4 34. Rxc7 Rb4 35. Rxb4 Bxb4 $15 {[%mdl 4096] Endgame KRB-KRN} 36. Nc3 $1 Ba5 37. Rc4 a3 (37... Bxc3 $5 38. Rxc3 Rxb5 39. Rc8+ Kf7 40. Rc7+ Kf6 41. Rc6+ Kf7 $17) 38. Na2 (38. Kh3 $11 {keeps the balance.}) 38... Bd8 (38... Rxb5 $17 {And now ...Rb2+ would win.} 39. Ra4 Rb2+ 40. Kh3 Rxa2 41. Rxa5 Kf7) 39. Ra4 $11 {The position is equal.} Be7 40. Nc3 Kf7 41. Kh3 Rc8 42. Nd5 {[#] Strongly threatening Ra7.} Bc5 43. b6 {[%cal Bb5b6,Bb6b7][%mdl 32]} Rb8 44. Ra5 Bf8 45. Ra6 Bc5 46. Ra5 Bd6 47. Ne3 Rc8 48. b7 Rc3 49. Ra6 Bb8 50. Ra8 Rxe3 {Accuracy: White = 85%, Black = 89%.} 1/2-1/2