lichess dev

[Event "Masterclass Arena"] [Site "http://chess-academy.net/om9uN493"] [Date "2022.02.01"] [Round "-"] [White "Mariaj"] [Black "Alex2765467"] [Result "0-1"] [UTCDate "2022.02.01"] [UTCTime "15:39:59"] [WhiteElo "1495"] [BlackElo "1711"] [WhiteRatingDiff "-6"] [BlackRatingDiff "+54"] [Variant "Standard"] [TimeControl "420+0"] [ECO "C20"] [Opening "Portuguese Opening"] [Termination "Normal"] [Annotator "chess-academy.net"] 1. e4 e5 2. Bb5?! { (0.30 → -0.25) Inaccuracy. Best move was Nf3. } { C20 Portuguese Opening } (2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Re1 Nc5) 2... Nc6?! { (-0.25 → 0.49) Inaccuracy. Best move was c6. } (2... c6 3. Ba4 d5 4. exd5 Qxd5 5. Qf3 Nf6 6. Bb3 Qd8 7. Nc3) 3. Nc3?! { (0.49 → -0.44) Inaccuracy. Best move was Nf3. } (3. Nf3 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6 7. d3 Bd6) 3... Nf6?! { (-0.44 → 0.49) Inaccuracy. Best move was Nd4. } (3... Nd4 4. Bc4 c6 5. Nf3 Nf6 6. O-O d6 7. Nxd4 exd4 8. Ne2 Nxe4 9. Nxd4 d5 10. d3) 4. b4? { (0.49 → -1.80) Mistake. Best move was Nf3. } (4. Nf3 Nd4) 4... Bxb4 5. Nb1? { (-1.51 → -3.51) Mistake. Best move was Nge2. } (5. Nge2 O-O) 5... d6? { (-3.51 → -1.75) Mistake. Best move was O-O. } (5... O-O 6. Ne2 Nxe4 7. O-O d5 8. d3 Nf6 9. Bxc6 bxc6 10. Nd2 Bd6 11. Rb1 Bd7 12. h3) 6. Ba4? { (-1.75 → -3.53) Mistake. Best move was c3. } (6. c3 Ba5) 6... Bg4? { (-3.53 → -2.33) Mistake. Best move was Nxe4. } (6... Nxe4) 7. Ne2? { (-2.33 → -3.33) Mistake. Best move was f3. } (7. f3 Be6) 7... Nxe4 8. Ng3?? { (-3.01 → -11.60) Blunder. Best move was O-O. } (8. O-O Bc5) 8... Bxd1 9. Nxe4 Bg4 10. Ng5 Qxg5 11. h3 Qf6 12. hxg4 Bc5 13. d3 Qxf2+ 14. Kd1 Be3 15. Bxe3 Qxe3 16. Nd2 a6 17. Kc1 O-O 18. Kb2 Qd4+ 19. Kb1 Qxa4 20. Kb2 Nd4 21. Rag1?! { (-18.04 → Mate in 11) Checkmate is now unavoidable. Best move was Nb3. } (21. Nb3) 21... Qxc2+ 22. Ka1 Nc6?! { (Mate in 10 → -21.21) Lost forced checkmate sequence. Best move was Qc3+. } (22... Qc3+ 23. Kb1 Qxd3+ 24. Ka1 Nc2+ 25. Kb2 Nb4 26. Ne4 Qc2+ 27. Ka3 b5 28. Rb1 a5 29. Nf6+) 23. Rh2?! { (-21.21 → Mate in 2) Checkmate is now unavoidable. Best move was Nb3. } (23. Nb3 Qc3+) 23... Nb4 24. Rgh1 Qxa2# { Black wins by checkmate. } 0-1