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Puzzles (3 cohencoins award for each match):

Puzzle l7glJ: 992

GM🔥 Isaac6 (1927) +1
FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/iIby5cHa"] [Date "2025.12.13"] [White "Robbie3"] [Black "Isaac6"] [Result "0-1"] [UTCDate "2025.12.13"] [UTCTime "00:12:58"] [WhiteElo "1218"] [BlackElo "1927"] [WhiteRatingDiff "+0"] [BlackRatingDiff "+1"] [WhiteTitle "NM"] [BlackTitle "GM🔥"] [Variant "Standard"] [TimeControl "420+2"] [ECO "C64"] [Opening "Ruy Lopez: Classical Variation"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 { C64 Ruy Lopez: Classical Variation } 4. Bxc6?! { (0.71 → -0.25) Inaccuracy. c3 was best. } (4. c3 Nge7) 4... dxc6 5. Nc3 Bg4?! { (-0.49 → 0.33) Inaccuracy. f6 was best. } (5... f6 6. Qe2 Ne7 7. d3 Be6 8. Na4 Bd6 9. Be3 b6 10. d4 Ng6 11. O-O-O Qe7 12. Nc3) 6. d4?? { (0.33 → -2.11) Blunder. h3 was best. } (6. h3 Bh5 7. g4 Bg6 8. Nxe5 Bxf2+ 9. Kxf2 Qd4+ 10. Kg2 Qxe5 11. d3 h5 12. g5 Ne7) 6... exd4 7. Ne2 Bxf3 8. gxf3 Qh4 9. Bf4?! { (-1.80 → -2.73) Inaccuracy. Qd3 was best. } (9. Qd3 Ne7 10. Bd2 Ng6 11. f4 O-O-O 12. Rg1 Rhe8 13. O-O-O Bf8 14. f3 c5 15. Rg4 Qe7) 9... O-O-O?! { (-2.73 → -1.93) Inaccuracy. d3 was best. } (9... d3) 10. Qd2?! { (-1.93 → -2.62) Inaccuracy. Bg3 was best. } (10. Bg3) 10... d3 11. Rf1?? { (-2.68 → -10.04) Blunder. Bg3 was best. } (11. Bg3 Qf6) 11... dxe2 12. Qxe2 Qxf4 13. Qc4?! { (-11.00 → Mate in 1) Checkmate is now unavoidable. c3 was best. } (13. c3 Nf6 14. Rd1 Kb8 15. b4 Rhe8 16. bxc5 Rc8 17. Rg1 Qxh2 18. Rxg7 Qh1+ 19. Kd2 Qh6+) 13... Qd2# { Black wins by checkmate. } 0-1
Computer analysisMove timesCrosstableFEN & PGN
Reconnecting