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Puzzles (3 cohencoins award for each match):

Puzzle So5Wh: 683

FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/xCCAEyyX"] [Date "2026.01.28"] [White "Ioana"] [Black "Maria"] [Result "1-0"] [UTCDate "2026.01.28"] [UTCTime "21:02:57"] [WhiteElo "838"] [BlackElo "1215"] [WhiteRatingDiff "+21"] [BlackRatingDiff "-16"] [BlackTitle "❦"] [Variant "Standard"] [TimeControl "420+2"] [ECO "C42"] [Opening "Russian Game: Italian Variation"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 e5 2. Bc4?! { (0.60 → -0.05) Inaccuracy. Nf3 was best. } (2. Nf3 Nc6 3. Bb5 Nge7 4. O-O Ng6 5. d4 exd4 6. Nxd4 Bc5 7. Nf5 O-O 8. Nc3 a6) 2... Nf6 3. Nf3?! { (0.08 → -0.82) Inaccuracy. Nc3 was best. } { C42 Russian Game: Italian Variation } (3. Nc3) 3... Bc5?? { (-0.82 → 1.99) Blunder. Nxe4 was best. } (3... Nxe4 4. Nc3 Nxc3 5. dxc3 f6 6. Nh4 g6 7. f4 Qe7 8. f5 Qg7 9. Be3 d6 10. a4) 4. O-O?? { (1.99 → 0.28) Blunder. Nxe5 was best. } (4. Nxe5 O-O 5. d4 Bb6 6. Nxf7 Qe7 7. Ne5+ Kh8 8. O-O d6 9. Nf3 Bg4 10. Be2 Nxe4) 4... Qe7?? { (0.28 → 3.50) Blunder. Nc6 was best. } (4... Nc6 5. d3 O-O 6. c3 d6 7. a4 a5 8. Na3 h6 9. h3 Be6 10. Bxe6 fxe6 11. Qb3) 5. d4 exd4?! { (3.37 → 5.16) Inaccuracy. Bb6 was best. } (5... Bb6 6. dxe5) 6. c3?? { (5.16 → 1.60) Blunder. e5 was best. } (6. e5) 6... dxc3 7. bxc3?? { (2.05 → -1.41) Blunder. e5 was best. } (7. e5 cxb2) 7... Qxe4?? { (-1.41 → 6.91) Blunder. d6 was best. } (7... d6 8. e5 dxe5 9. Nxe5 O-O 10. Re1 Qd6 11. Qf3 Be6 12. Bxe6 fxe6 13. Nd3 Nbd7 14. Nd2) 8. Nfd2?? { (6.91 → -1.40) Blunder. Re1 was best. } (8. Re1 O-O) 8... Ng4?? { (-1.40 → 14.15) Blunder. Qg4 was best. } (8... Qg4 9. Be2 Qg6 10. Nb3 Bb6 11. Bd3 Qg4 12. Re1+ Kd8 13. Be2 Qh4 14. g3 Qh3 15. Nd4) 9. Nxe4 Bxf2+ 10. Rxf2 Nxf2 11. Qf1 Nxe4 12. Bxf7+ Kf8 13. Qc4 Nf6 14. Nd2 d5 15. Qe2?? { (12.24 → 2.36) Blunder. Bxd5 was best. } (15. Bxd5 Ke8) 15... Bg4?? { (2.36 → 7.29) Blunder. Kxf7 was best. } (15... Kxf7 16. Qe5 Re8 17. Qxc7+ Kg8 18. Ba3 b6 19. Nf3 Na6 20. Qc6 Bd7 21. Qb7 Nc5 22. Bxc5) 16. Qe1?? { (7.29 → 2.24) Blunder. Nf3 was best. } (16. Nf3 Nbd7) 16... Ne4?? { (2.24 → 12.05) Blunder. Kxf7 was best. } (16... Kxf7 17. h3) 17. Nxe4 dxe4 18. Ba3+ c5? { (8.95 → Mate in 8) Checkmate is now unavoidable. Kxf7 was best. } (18... Kxf7 19. Qf1+) 19. Qxe4 Kxf7 20. Qxg4?! { (Mate in 3 → 15.01) Lost forced checkmate sequence. Rf1+ was best. } (20. Rf1+ Bf3 21. Rxf3+ Kg8 22. Qc4#) 20... Re8?! { (15.01 → Mate in 8) Checkmate is now unavoidable. Re8 was best. } (20... Re8 21. Qh5+) 21. Bxc5?! { (Mate in 8 → 11.17) Lost forced checkmate sequence. Qc4+ was best. } (21. Qc4+ Kg6 22. Rf1 h5 23. Qf7+ Kh6 24. Rf5 Re1+ 25. Kf2 Rf1+ 26. Kxf1 g6 27. Bc1+ g5) 21... Nd7 22. Rf1+ Nf6 23. Qh3 g5? { (7.92 → Mate in 6) Checkmate is now unavoidable. Rac8 was best. } (23... Rac8) 24. Bf2?! { (Mate in 6 → 10.75) Lost forced checkmate sequence. Qxh7+ was best. } (24. Qxh7+ Ke6 25. Qf5+ Kf7 26. Qxf6+ Kg8 27. Qg6+ Kh8 28. Bd4+ Re5 29. Bxe5#) 24... g4 25. Qd3 Rad8 26. Qc2 Ne4 27. Re1 Nxf2 28. Kxf2 b5 29. Qxh7+ Kf8? { (9.87 → Mate in 10) Checkmate is now unavoidable. Kf6 was best. } (29... Kf6 30. Rf1) 30. Qh6+? { (Mate in 10 → 9.87) Lost forced checkmate sequence. Rf1 was best. } (30. Rf1 Re7 31. Qh8+ Kf7 32. Kg3+ Ke6 33. Qxd8 Rd7 34. Qe8+ Kd6 35. Rd1+ Kc5 36. Qxd7 b4) 30... Kf7 31. Qh5+ Kf6 32. Rxe8 Rxe8 33. Qxe8 Kg7 34. Qxb5 Kf7 35. c4 Ke7 36. c5 Kd8 37. c6 Kc7 38. Qc5 a6 39. Qe5+ Kxc6 40. h3 gxh3 41. gxh3 Kb6 42. h4 a5 43. h5 Kc6 44. Qe4+ Kb5 45. h6 a4 46. h7 a3 47. h8=Q Kc5 48. Qc8+ Kb5 49. Qd7+ Kc5 50. Qed5+ Kb4 51. Q7b7+ Kc3 52. Qe5+ Kd3 53. Qbd5+ Kc2 54. Qee4+ Kc3 55. Qdd4# { White wins by checkmate. } 1-0
Computer analysisMove timesCrosstableFEN & PGN
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