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Puzzles (3 cohencoins award for each match):

Puzzle muOXD: 527

IM🔱 David3 (1529) +14
FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/Dl9SEOSl"] [Date "2025.09.19"] [White "David3"] [Black "BENJAMIN4"] [Result "1-0"] [UTCDate "2025.09.19"] [UTCTime "20:50:44"] [WhiteElo "1529"] [BlackElo "1673"] [WhiteRatingDiff "+14"] [BlackRatingDiff "-8"] [WhiteTitle "IM🔱"] [BlackTitle "🌊"] [Variant "Standard"] [TimeControl "420+2"] [ECO "B01"] [Opening "Scandinavian Defense: Main Line"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 d5?! { (0.41 → 0.96) Inaccuracy. c5 was best. } (1... c5 2. Nf3) 2. exd5 Qxd5 3. Nc3 Qa5 { B01 Scandinavian Defense: Main Line } 4. Nf3 Nf6 5. Bc4 Bf5 6. d3 e6 7. Bf4 Bd6 8. Bg3?! { (0.33 → -0.33) Inaccuracy. Bd2 was best. } (8. Bd2 Qb6) 8... Nbd7 9. O-O Bxg3 10. hxg3?! { (-0.10 → -0.66) Inaccuracy. fxg3 was best. } (10. fxg3 Bg4 11. h3 Qb6+ 12. Kh2 Bxf3 13. Qxf3 O-O 14. Bb3 Ne5 15. Qf4 Ng6 16. Qf2 Rad8) 10... O-O?! { (-0.66 → -0.03) Inaccuracy. Bg4 was best. } (10... Bg4 11. Re1 O-O-O 12. a4 a6 13. Ne4 Ne5 14. Ned2 Bxf3 15. gxf3 Ng6 16. b4 Qxb4 17. Rb1) 11. Re1 Nb6 12. Qd2?! { (0.09 → -0.74) Inaccuracy. Bb3 was best. } (12. Bb3 Rfd8 13. Qd2 Nbd7 14. a4 h6 15. Ne4 Qxd2 16. Nxf6+ Nxf6 17. Nxd2 a5 18. f3 h5) 12... Nxc4 13. dxc4 Bg4?! { (-0.85 → -0.05) Inaccuracy. Qb4 was best. } (13... Qb4 14. Ne5 Rfd8 15. Qc1 Ng4 16. Nxg4 Bxg4 17. a3 Qxc4 18. Re4 Rd4 19. Qf4 Rxe4 20. Nxe4) 14. Rad1 Bxf3 15. gxf3 c6 16. Re3 Rad8 17. Rd3 Rxd3 18. Qxd3 h6?! { (0.30 → 0.82) Inaccuracy. h5 was best. } (18... h5 19. Kg2 Qe5 20. b3 Re8 21. Ne4 Nxe4 22. fxe4 h4 23. Qd4 Qxd4 24. Rxd4 hxg3 25. Kxg3) 19. a3?! { (0.82 → 0.27) Inaccuracy. b3 was best. } (19. b3 Re8 20. Qe3 Qb6 21. Qe5 Rd8 22. Kg2 Rxd1 23. Nxd1 Kf8 24. Qb8+ Ke7 25. c5 Qxc5) 19... Qc7 20. Ne4 Nxe4 21. fxe4 Kh7? { (0.08 → 1.29) Mistake. f5 was best. } (21... f5 22. Qd7 Qe5 23. exf5 Qxf5 24. Rd2 Qe5 25. Qd4 Qe1+ 26. Kg2 e5 27. Qd3 e4 28. Qe2) 22. e5+ f5?? { (1.00 → 5.50) Blunder. Kg8 was best. } (22... Kg8 23. Qe3) 23. exf6+ g6?! { (5.31 → 7.73) Inaccuracy. Kg8 was best. } (23... Kg8 24. fxg7) 24. Qd7+ Qxd7 25. Rxd7+ Kg8 26. f7+?? { (7.59 → 0.18) Blunder. Rg7+ was best. } (26. Rg7+ Kh8) 26... Rxf7 27. Rxf7?? { (0.14 → -2.83) Blunder. Rd6 was best. } (27. Rd6 Re7 28. Kg2 Kg7 29. Kf3 Rf7+ 30. Ke3 Kf6 31. Rd8 Kf5 32. c5 a6 33. b4 Kg4) 27... Kxf7 28. Kg2 Kf6 29. Kf3 Kf5 30. g4+?! { (-3.20 → -4.74) Inaccuracy. c5 was best. } (30. c5 e5) 30... Ke5?! { (-4.74 → -3.46) Inaccuracy. Kg5 was best. } (30... Kg5) 31. Ke3 g5?? { (-4.06 → 0.70) Blunder. h5 was best. } (31... h5) 32. b4 b6 33. a4 a6?? { (1.03 → 3.57) Blunder. c5 was best. } (33... c5 34. bxc5) 34. c3?? { (3.57 → 1.09) Blunder. b5 was best. } (34. b5 cxb5 35. cxb5 axb5 36. axb5 Kd5 37. Kd3 e5 38. c4+ Kd6 39. Kc3 Kc5 40. f3 Kd6) 34... Kd6 35. Kd4 e5+?? { (1.35 → 3.41) Blunder. c5+ was best. } (35... c5+ 36. Ke4 a5 37. b5 Kd7 38. Ke5 Ke7 39. f3 Kd7 40. Kf6 Kd6 41. Kg6 Ke5 42. Kf7) 36. Ke4 Ke6 37. f3 c5?? { (2.93 → 8.00) Blunder. Kf6 was best. } (37... Kf6 38. b5 cxb5 39. axb5 axb5 40. cxb5 Ke6 41. c4 Kd6 42. Kf5 Kc5 43. Kg6 Kxc4 44. Kxh6) 38. bxc5 bxc5 39. a5 Kd6 40. Kf5 e4 41. Kxe4?? { (11.76 → 0.01) Blunder. fxe4 was best. } (41. fxe4 Ke7 42. e5 Kf7 43. e6+ Kg7 44. Ke5 Kf8 45. Kf6 Ke8 46. e7 Kd7 47. Kf7 Kd6) 41... Ke6 42. f4 gxf4 43. Kxf4 Kf6 44. Ke4 Kg5?? { (0.00 → 7.66) Blunder. Ke6 was best. } (44... Ke6 45. Kf4 Kf6 46. Kg3 Kf7 47. Kf3 Ke7 48. Ke3 Kf7 49. Ke2 Ke6 50. Kf2 Kf6) 45. Kd5 Kxg4 46. Kxc5 h5 47. Kb6 h4 48. c5 h3 49. c6 h2 50. c7 h1=Q 51. c8=Q+ Kg3 52. Qg8+ Kf2 53. Qf8+ Ke3 54. Qe8+ Kd3 55. Qd8+?? { (8.52 → 0.78) Blunder. Qc6 was best. } (55. Qc6) 55... Kxc3 56. Qc8+?! { (0.69 → 0.00) Inaccuracy. Kxa6 was best. } (56. Kxa6 Qc6+ 57. Qb6 Qd5 58. Ka7 Kd2 59. a6 Ke1 60. Qb1+ Kf2 61. Qc2+ Kf1 62. Qc1+ Kf2) 56... Kb4 57. Qc5+ Kb3 58. Qe3+ Kc4 59. Qe2+ Kd4?! { (0.00 → 0.75) Inaccuracy. Kb3 was best. } (59... Kb3 60. Qe6+ Kb4 61. Qd6+ Ka4 62. Qd4+ Ka3 63. Kxa6 Qc6+ 64. Qb6 Qc4+ 65. Kb7 Qf7+ 66. Ka6) 60. Qxa6 Qh6+ 61. Kb5?! { (0.71 → 0.00) Inaccuracy. Ka7 was best. } (61. Ka7 Qg5 62. Qb6+ Kd3 63. Qb4 Qd5 64. a6 Ke2 65. Qb2+ Kf1 66. Qf6+ Kg2 67. Kb6 Qb3+) 61... Qxa6+?? { (0.00 → 57.61) Blunder. Qh5+ was best. } (61... Qh5+ 62. Kc6 Qe8+ 63. Kc7 Qe7+ 64. Kb8 Qd8+ 65. Qc8 Qxa5 66. Qd7+ Ke3 67. Kb7 Qc5 68. Qc7) 62. Kxa6 Kc5 63. Kb7 Kb5 64. a6 Ka5?! { (10.29 → Mate in 12) Checkmate is now unavoidable. Kc4 was best. } (64... Kc4 65. Kc7 Kd3 66. a7 Kd2 67. a8=Q Kc3 68. Qg2 Kb3 69. Kd7 Kc3 70. Qf3+ Kd2) 65. a7?! { (Mate in 12 → 56.12) Lost forced checkmate sequence. a7 was best. } { Black resigns. } (65. a7 Kb5 66. a8=Q Kc4 67. Kb6 Kd3 68. Qe8 Kd2 69. Qe4 Kd1 70. Kc5 Kc1 71. Qe2 Kb1) 1-0
Computer analysisMove timesCrosstableFEN & PGN
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