lichess dev

[Event "Open Arena"] [Site "http://chess-academy.net/aATR6Q9t"] [Date "2021.01.25"] [Round "-"] [White "Sofia"] [Black "Jenni"] [Result "0-1"] [UTCDate "2021.01.25"] [UTCTime "17:12:39"] [WhiteElo "1228"] [BlackElo "1628"] [WhiteRatingDiff "-3"] [BlackRatingDiff "+29"] [Variant "Standard"] [TimeControl "420+2"] [ECO "C24"] [Opening "Bishop's Opening: Berlin Defense"] [Termination "Normal"] [Annotator "chess-academy.net"] 1. e4 e5 2. Bc4 Nf6 { C24 Bishop's Opening: Berlin Defense } 3. g4? { (0.13 → -2.44) Mistake. Best move was Nc3. } (3. Nc3 Nc6 4. d3 Na5 5. Bb3 Bb4 6. Nf3 Bxc3+ 7. bxc3 d6) 3... d5 4. exd5 Nxd5? { (-2.28 → -1.13) Mistake. Best move was Bxg4. } (4... Bxg4 5. f3 Bh5 6. Nc3 c6 7. d4 Bb4 8. dxe5 Nxd5 9. Qd4 Nxc3 10. Qxd8+ Kxd8 11. a3) 5. Bxd5? { (-1.13 → -3.25) Mistake. Best move was Nc3. } (5. Nc3 Nb6) 5... Qxd5 6. c4?? { (-3.00 → -10.39) Blunder. Best move was Qf3. } (6. Qf3 Qxf3 7. Nxf3 Nc6 8. h3 e4 9. Ng1 h5 10. g5 Nd4 11. Kd1 h4 12. Ne2 Nf3) 6... Qxh1 7. Qe2 Qxg1+ 8. Qf1 Qxh2 9. Qe2 Nc6 10. Nc3 Bc5 11. Nd5?! { (-19.97 → Mate in 9) Checkmate is now unavoidable. Best move was Qf1. } (11. Qf1 Nd4 12. f3 Nxf3+ 13. Qxf3 Qg1+ 14. Ke2 Bxg4 15. Qxg4 Qxg4+ 16. Kd3 O-O-O+ 17. Kc2 Qxc4) 11... Nb4?! { (Mate in 9 → -14.11) Lost forced checkmate sequence. Best move was Qg1+. } (11... Qg1+ 12. Qf1 Bxf2+ 13. Ke2 Bxg4+ 14. Kd3 Qxf1+ 15. Kc3 Bd4+ 16. Kb3 Bd1+ 17. Ka3 Qxc4 18. Nf6+) 12. Nxc7+ Kd8 13. Nxa8?! { (-19.36 → Mate in 3) Checkmate is now unavoidable. Best move was d4. } (13. d4 Qg1+ 14. Kd2 Bxg4 15. Qe1 Qxe1+ 16. Kxe1 Kxc7 17. dxc5 Nc2+ 18. Kd2 Nxa1 19. b3 Rhd8+) 13... Nc2+?! { (Mate in 3 → Mate in 7) Not the best checkmate sequence. Best move was Qg1+. } (13... Qg1+ 14. Qf1 Bxf2+ 15. Ke2 Bxg4#) 14. Kd1 Nxa1?! { (Mate in 7 → -26.83) Lost forced checkmate sequence. Best move was Nd4. } (14... Nd4 15. d3 Qh1+ 16. Kd2 Bb4+ 17. Ke3 Qh6+ 18. Ke4 f5+ 19. gxf5 Bxf5+ 20. Kxe5 Qd6#) 15. Ke1?! { (-26.83 → Mate in 6) Checkmate is now unavoidable. Best move was d4. } (15. d4 Qg1+) 15... a6?! { (Mate in 6 → -30.24) Lost forced checkmate sequence. Best move was Qg1+. } (15... Qg1+ 16. Qf1 Bxf2+ 17. Ke2 Bxg4+ 18. Kd3 Qg3+ 19. Ke4 Qf4+ 20. Kd3 Qf3#) 16. d4?! { (-30.24 → Mate in 11) Checkmate is now unavoidable. Best move was Qd3+. } (16. Qd3+ Bd7 17. Qf1 Bxg4 18. f3 Bh3 19. Qxh3 Qxh3 20. d4 Bxd4 21. Bg5+ Kd7 22. c5 Qg3+) 16... Bxd4?! { (Mate in 11 → -17.16) Lost forced checkmate sequence. Best move was Bb4+. } (16... Bb4+ 17. Bd2 Qh1+ 18. Qf1 Qe4+ 19. Qe2 Qb1+ 20. Qd1 Nc2+ 21. Kf1 Qxd1+ 22. Kg2 Bxd2 23. Nc7) 17. Qd3?! { (-17.16 → Mate in 3) Checkmate is now unavoidable. Best move was f3. } (17. f3 Qg1+) 17... Qxf2+ 18. Kd1 Bxg4+ 19. Qe2 Qxe2# { Black wins by checkmate. } 0-1