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Puzzles (3 cohencoins award for each match):

Puzzle 3a3tD: 538

FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/gkVpBbAV"] [Date "2025.07.09"] [White "LuNa"] [Black "Ioana"] [Result "0-1"] [UTCDate "2025.07.09"] [UTCTime "20:18:38"] [WhiteElo "886"] [BlackElo "827"] [WhiteRatingDiff "-19"] [BlackRatingDiff "+16"] [Variant "Standard"] [TimeControl "420+2"] [ECO "C30"] [Opening "King's Gambit Declined: Classical Variation"] [Termination "Time forfeit"] [Annotator "cohenchessclub.com"] 1. e4 e5 2. f4? { (0.60 → -0.42) Mistake. 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... Bc5 { C30 King's Gambit Declined: Classical Variation } 3. fxe5?? { (-0.13 → -6.09) Blunder. Nf3 was best. } (3. Nf3 d6) 3... f6?? { (-6.09 → 3.45) Blunder. Qh4+ was best. } (3... Qh4+) 4. exf6?! { (3.45 → 2.26) Inaccuracy. d4 was best. } (4. d4 Bb6 5. Nf3 Nc6 6. Bc4 d6 7. exd6 Bg4 8. c3 Qxd6 9. O-O Ne5 10. Be2 Ne7) 4... g6?? { (2.26 → 7.76) Blunder. Nxf6 was best. } (4... Nxf6 5. d4) 5. f7+?! { (7.76 → 5.09) Inaccuracy. d4 was best. } (5. d4 Bb6 6. e5 d6 7. Bc4 Nxf6 8. exf6 d5 9. Bg5 Qd6 10. Be2 h6 11. Bh4 g5) 5... Kxf7 6. Qf3+?? { (5.03 → 1.51) Blunder. Nf3 was best. } (6. Nf3 d5) 6... Ke6?? { (1.51 → 9.70) Blunder. Nf6 was best. } (6... Nf6 7. c3 d5 8. d4 dxe4 9. Bc4+ Ke8 10. Qf2 Be7 11. Ne2 Nc6 12. O-O Na5 13. Nd2) 7. Qg4+?? { (9.70 → 3.37) Blunder. d4 was best. } (7. d4 Bxd4) 7... Ke5?? { (3.37 → 12.53) Blunder. Kf7 was best. } (7... Kf7 8. Qf4+ Qf6 9. d3 d6 10. Nc3 Nc6 11. Nf3 Qxf4 12. Bxf4 Bg4 13. Ng5+ Kg7 14. Be2) 8. Nf3+ Kd6 9. e5+ Kc6?! { (10.61 → Mate in 6) Checkmate is now unavoidable. Ke7 was best. } (9... Ke7 10. d4 d5 11. Qg3 Bb6 12. Bg5+ Ke8 13. Bxd8 Kxd8 14. Ng5 Ke8 15. Qf4 Bf5 16. g4) 10. Nd4+?? { (Mate in 6 → 6.83) Lost forced checkmate sequence. Qa4+ was best. } (10. Qa4+ b5 11. Qxb5+ Kd5 12. Qb3+ Ke4 13. Bd3+ Kf4 14. Qa4+ Bb4 15. Qxb4#) 10... Kb6 11. e6?? { (6.58 → 2.85) Blunder. Nc3 was best. } (11. Nc3 a6) 11... Qe8?? { (2.85 → 7.05) Blunder. dxe6 was best. } (11... dxe6 12. Nb3) 12. Qe4? { (7.05 → 3.41) Mistake. Nc3 was best. } (12. Nc3 a6 13. Na4+ Ka7 14. Nxc5 dxe6 15. Qe2 Nf6 16. a4 e5 17. Nb5+ axb5 18. axb5+ Na6) 12... g5?? { (3.41 → 9.50) Blunder. Nf6 was best. } (12... Nf6 13. Qe5) 13. e7?? { (9.50 → 1.80) Blunder. b4 was best. } (13. b4 Bd6 14. Nc3 c6 15. Be2 Na6 16. Rb1 Nf6 17. Qe3 Kc7 18. O-O Qe7 19. Ndb5+ Kb8) 13... Nxe7 14. Nf5?? { (1.26 → -7.75) Blunder. b4 was best. } (14. b4) 14... d5?! { (-7.75 → -5.56) Inaccuracy. Nxf5 was best. } (14... Nxf5 15. Qxe8) 15. Qe5?! { (-5.56 → -10.07) Inaccuracy. Ng7 was best. } (15. Ng7 dxe4) 15... Nxf5 16. Qxe8 Be6?? { (-9.91 → Mate in 1) Checkmate is now unavoidable. Rxe8+ was best. } (16... Rxe8+) 17. Bb5?? { (Mate in 1 → -0.46) Lost forced checkmate sequence. Qb5# was best. } (17. Qb5#) 17... Rxe8 18. Bxe8 Ng7?? { (-0.52 → 2.05) Blunder. Nd7 was best. } (18... Nd7 19. Bxd7) 19. Bg6?? { (2.05 → -5.25) Blunder. d4 was best. } (19. d4 Bxd4) 19... Bf5?? { (-5.25 → 5.11) Blunder. hxg6 was best. } (19... hxg6 20. d3) 20. Bxf5 Nxf5 21. d4?? { (5.42 → 1.26) Blunder. Rf1 was best. } (21. Rf1 Nd4) 21... g4?? { (1.26 → 8.92) Blunder. Nxd4 was best. } { Black wins on time. } (21... Nxd4) 0-1
Computer analysisMove timesCrosstableFEN & PGN
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