[Event "Nationale 4"] [Site "Villeurbanne"] [Date "2018.12.16"] [Round "4"] [White "Samuel S."] [Black "Lucas B."] [Result "0-1"] [WhiteElo "1150"] [BlackElo "1419"] [Variant "Standard"] [TimeControl "-"] [ECO "A48"] [Opening "London System"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nf6 2. Nf3 g6 3. Bf4 { A48 London System } d5 4. Nbd2 Bg7 5. c4 O-O 6. e3 c5 7. dxc5 Nc6 8. Nb3?! { (-0.15 → -1.23) Inaccuracy. Qb3 was best. } (8. Qb3 d4 9. exd4 Nxd4 10. Nxd4 Qxd4 11. Be3 Qe5 12. Nf3 Qc7 13. Be2 Ng4 14. Bd2 Rd8) 8... Nh5?? { (-1.23 → 0.70) Blunder. Be6 was best. } (8... Be6 9. Qc1) 9. cxd5 Nb4?! { (0.63 → 1.62) Inaccuracy. Nxf4 was best. } (9... Nxf4) 10. Be5 Bxe5 11. Nxe5 Bf5 12. Bd3?? { (1.83 → -3.64) Blunder. Rc1 was best. } (12. Rc1 Nf6 13. a3 Nbxd5 14. Qd4 Qc7 15. c6 Rad8 16. cxb7 Qxb7 17. Na5 Qb6 18. Nac6 Rd6) 12... Nxd3+ 13. Nxd3 Qxd5 14. Nd4 Qxg2?! { (-3.45 → -2.51) Inaccuracy. Bxd3 was best. } (14... Bxd3 15. Qxd3 e5 16. O-O exd4 17. Rfd1 Qxc5 18. Qxd4 Qxd4 19. Rxd4 Nf6 20. g4 Rfe8 21. Rc1) 15. Ke2?? { (-2.51 → -10.89) Blunder. Rf1 was best. } (15. Rf1 Be4 16. Qd2 Qxh2 17. O-O-O Rac8 18. f4 Qxd2+ 19. Kxd2 Bxd3 20. Kxd3 Rxc5 21. Rc1 Rcc8) 15... Bg4+ 16. Kd2 Bxd1 17. Raxd1 Rfd8 18. Kc3 Nf6 19. f3 Nd5+ 20. Kc4?! { (-17.10 → Mate in 27) Checkmate is now unavoidable. Kb3 was best. } (20. Kb3 Nxe3) 20... Nxe3+ 21. Kc3 Nxd1+ 22. Rxd1 Rac8 23. Rd2 Qg5 24. f4?! { (-16.69 → Mate in 8) Checkmate is now unavoidable. Nb3 was best. } (24. Nb3 Qf6+) 24... Qd5?! { (Mate in 8 → -22.21) Lost forced checkmate sequence. Rxc5+ was best. } (24... Rxc5+ 25. Nxc5 Qxc5+ 26. Kb3 b5 27. Rc2 Qxd4 28. Rc6 a5 29. a3 Qd5+ 30. Kc2 Qd1+ 31. Kc3) 25. Nb4?! { (-22.21 → Mate in 2) Checkmate is now unavoidable. Ne6 was best. } (25. Ne6 Qxe6) 25... Rxc5+ 26. Kd3 Qxd4+ 27. Ke2 Qxd2+ 28. Kf3 Rd4 29. Nd5 Qd3+ 30. Kg4 Rcxd5 31. h4 Qf5+ 32. Kf3 Rd3+ 33. Ke2 Qe4+ 34. Kf2 Qf3+ 35. Kg1 Rd1+ 36. Kh2 R5d2# { Black wins by checkmate. } 0-1