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Puzzles (3 cohencoins award for each match):

FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/MfhEXi1G"] [Date "2026.10.13"] [White "Vincent3"] [Black "Summer"] [Result "1-0"] [UTCDate "2026.10.13"] [UTCTime "14:30:10"] [WhiteElo "1420"] [BlackElo "1396"] [WhiteRatingDiff "+10"] [BlackRatingDiff "-9"] [WhiteTitle "GM"] [BlackTitle "GM🐬"] [Variant "Standard"] [TimeControl "420+2"] [ECO "C47"] [Opening "Four Knights Game: Scotch Variation"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 { C47 Four Knights Game: Scotch Variation } d6?! { (-0.04 → 0.75) Inaccuracy. exd4 was best. } (4... exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 O-O 8. O-O d5 9. exd5 cxd5 10. Bg5 c6 11. Qf3) 5. d5 Nb4?! { (0.80 → 1.35) Inaccuracy. Ne7 was best. } (5... Ne7 6. a4) 6. Bd3? { (1.35 → 0.27) Mistake. h3 was best. } (6. h3 Be7 7. a3 Na6 8. Be3 c6 9. Bxa6 bxa6 10. dxc6 Qc7 11. Bg5 Qxc6 12. Qd3 Rb8) 6... Nxd3+ 7. Qxd3?! { (0.61 → -0.26) Inaccuracy. cxd3 was best. } (7. cxd3 Be7) 7... Be7 8. Bg5 O-O 9. Bxf6 Bxf6 10. O-O Bg4 11. h4? { (-0.45 → -1.74) Mistake. a4 was best. } (11. a4 Be7 12. a5 a6 13. Rfb1 Bd7 14. b4 Qc8 15. Nd2 Bg5 16. f3 g6 17. b5 axb5) 11... Bxf3?! { (-1.74 → -1.16) Inaccuracy. Bxh4 was best. } (11... Bxh4 12. Nxh4) 12. Qxf3 Bxh4 13. Ne2 Qf6 14. Qxf6 Bxf6 15. g3 h6 16. Nc3 c5? { (-1.23 → -0.10) Mistake. Bd8 was best. } (16... Bd8 17. a4 a6 18. a5 g6 19. Ra4 h5 20. Rc4 Kg7 21. b4 f5 22. exf5 gxf5 23. f4) 17. dxc6?? { (-0.10 → -1.87) Blunder. a4 was best. } (17. a4 a6 18. a5 Bg5 19. Kg2 h5 20. Nb1 Rac8 21. Ra4 g6 22. Na3 Kg7 23. Nc4 Rcd8) 17... bxc6 18. Nd1 c5?? { (-2.17 → 0.37) Blunder. Rfd8 was best. } (18... Rfd8 19. Ne3 d5 20. Rfe1 Rab8 21. b3 Be7 22. c3 Bc5 23. exd5 cxd5 24. Rad1 d4 25. cxd4) 19. c4 Rad8 20. Ne3 Bg5 21. f4? { (-0.12 → -1.27) Mistake. Nd5 was best. } (21. Nd5 f5 22. exf5 Rxf5 23. Kg2 a5 24. Rad1 Rb8 25. b3 a4 26. bxa4 Rb2 27. a5 e4) 21... exf4 22. gxf4 Bf6 23. Rab1?? { (-1.34 → -3.91) Blunder. Kg2 was best. } (23. Kg2) 23... Rde8 24. e5 dxe5 25. fxe5?! { (-4.47 → -6.20) Inaccuracy. Ng4 was best. } (25. Ng4) 25... Rxe5 26. Ng4?! { (-5.69 → -8.45) Inaccuracy. Nd5 was best. } (26. Nd5) 26... Rg5 27. Rf4 Be5 28. Re4 h5?! { (-8.34 → -5.36) Inaccuracy. Bd4+ was best. } (28... Bd4+ 29. Kf1) 29. Rbe1?! { (-5.36 → -9.46) Inaccuracy. Rxe5 was best. } (29. Rxe5 Rxg4+ 30. Kf2 Rxc4 31. Rxh5 g6 32. Rd5 Re8 33. Rd7 a6 34. Ra7 Re6 35. Rf1 Rf6+) 29... hxg4? { (-9.46 → -4.27) Mistake. Bxb2 was best. } (29... Bxb2 30. Kf1 hxg4 31. Rb1 Bc3 32. Rb3 Bd4 33. Rxd4 cxd4 34. Rb5 Rxb5 35. cxb5 d3 36. a4) 30. Rxe5 Rxe5 31. Rxe5 Rc8 32. Re7?! { (-4.00 → -5.41) Inaccuracy. Rg5 was best. } (32. Rg5 Rc6 33. Kf2 g6 34. Rxg4 Rb6 35. b3 Kg7 36. Rg1 Rf6+ 37. Ke3 Rd6 38. Ke4 Rd4+) 32... a5 33. a4 Rd8?! { (-5.12 → -3.47) Inaccuracy. f5 was best. } (33... f5) 34. b3? { (-3.47 → -6.17) Mistake. Rc7 was best. } (34. Rc7 Rd1+) 34... Rd3 35. Rb7 g3 36. Kg2 f5 37. Rb5 f4 38. Rxc5 Rd2+ 39. Kf3 g2?? { (-7.60 → -0.19) Blunder. Rf2+ was best. } (39... Rf2+ 40. Ke4 Kf7 41. Rxa5 Kg6 42. Rf5 g2 43. Rxf4 g1=Q 44. Rxf2 Qxf2 45. a5 Qb2 46. Kd5) 40. Rg5 Kf7 41. Rxg2?? { (0.00 → -6.62) Blunder. Kxf4 was best. } (41. Kxf4 Kf6 42. Rf5+ Kg6 43. Rg5+ Kh6 44. Rg3 Rb2 45. Kf5 g5 46. Rh3+ Kg7 47. Rg3) 41... Rxg2 42. Kxg2 g5?? { (-6.99 → -1.88) Blunder. Ke6 was best. } (42... Ke6 43. Kf3 g5 44. Ke4 Kd6 45. Kf3 Ke5 46. Kf2 g4 47. Kg2 f3+ 48. Kg3 Kd6 49. Kf2) 43. Kf3?? { (-1.88 → -6.86) Blunder. b4 was best. } (43. b4 axb4) 43... Ke7 44. Kg4 Kd6 45. Kf3 Kc5 46. Kg4 Kb4 47. Kf3 Kxb3?? { (-7.13 → 58.92) Blunder. Kc5 was best. } (47... Kc5) 48. c5 Kxa4 49. c6 Kb3 50. c7 a4 51. c8=Q a3 52. Qb8+ Ka2?! { (60.22 → Mate in 5) Checkmate is now unavoidable. Kc2 was best. } (52... Kc2 53. Qc7+ Kb3 54. Qb6+ Ka4 55. Kg4 a2 56. Qb2 Ka5 57. Qxa2+ Kb6 58. Qd5 Ka6 59. Qxg5) 53. Qb4 Ka1 54. Qxa3+?! { (Mate in 5 → 60.18) Lost forced checkmate sequence. Qb3 was best. } (54. Qb3 g4+ 55. Ke4 g3 56. Kd3 g2 57. Kc2 g1=Q 58. Qxa3#) 54... Kb1?! { (60.18 → Mate in 23) Checkmate is now unavoidable. Kb1 was best. } (54... Kb1 55. Qc3 Ka2 56. Qb4 Ka1 57. Qb3 g4+ 58. Kxf4 g3 59. Qc3+ Ka2 60. Kxg3 Kb1 61. Kf4) 55. Qa4 Kb2 { Black offers draw } 56. Qe4 Kc3 57. Kg4 Kd2?! { (58.83 → Mate in 33) Checkmate is now unavoidable. Kb3 was best. } (57... Kb3 58. Kxg5 f3 59. Qxf3+ Kc4 60. Qf5 Kb3 61. Kg4 Kc4 62. Qe5 Kb3 63. Qd5+ Kb4 64. Kf4) 58. Kxg5 Kc3 59. Qxf4 Kd3 60. Kf5 Kc3 61. Qe4 Kd2 62. Qf3 Kc2 63. Qe3 Kb2 64. Qd3 Kc1 65. Qe2 Kb1 66. Ke4 Kc1 67. Kd3 Kb1 68. Kc3 Ka1 69. Qb2# { White wins by checkmate. } 1-0
RapidOverall
1010100110100110011010½½0110010101101010
12½7½
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