[Event "Nosbo comp"] [Site "Usquert"] [Date "2017.02.01"] [Round "4"] [White "Tjeerd Santama"] [Black "Daan Noordenbos"] [Result "0-1"] [WhiteElo "1769"] [BlackElo "1526"] [Variant "Standard"] [TimeControl "-"] [ECO "E61"] [Opening "King's Indian Defense"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nf6 2. c4 g6 3. Nc3 { E61 King's Indian Defense } Bg7 4. Nf3 O-O 5. e4 d6 6. h3 e5 7. d5 Nfd7 8. Bd3 a5 9. a3 Nc5 10. Bc2 f5 11. Bg5 Qe8 12. b4 fxe4 13. Bxe4 axb4 14. axb4 Rxa1 15. Qxa1 Nxe4 16. Nxe4 Bf5 17. Nfd2 Na6?! { (0.24 → 0.82) Inaccuracy. Qf7 was best. } (17... Qf7 18. O-O b5 19. Qa5 bxc4 20. Rc1 Bxe4 21. Nxe4 c6 22. Nxd6 Qxf2+ 23. Kh2 Qd4 24. Rxc4) 18. b5?! { (0.82 → 0.00) Inaccuracy. Qa5 was best. } (18. Qa5 Qc8 19. O-O h6 20. Be3 b6 21. Qa3 Nb8 22. Ra1 Nd7 23. g4 Bxe4 24. Nxe4 Nf6) 18... Nc5 19. Nxc5 dxc5 20. g4?? { (0.02 → -3.01) Blunder. Qc3 was best. } (20. Qc3 e4 21. Qb3 Qe5 22. b6 cxb6 23. O-O b5 24. Be3 bxc4 25. Qxc4 b6 26. Rb1 Rb8) 20... Bd3 21. Qa3 e4 22. Qxc5?? { (-3.02 → -13.01) Blunder. Be3 was best. } (22. Be3 b6) 22... Qa8 23. Nb3?! { (-11.04 → Mate in 8) Checkmate is now unavoidable. f4 was best. } (23. f4 Qa1+) 23... Bc3+ 24. Bd2 Bxd2+?? { (Mate in 7 → -6.94) Lost forced checkmate sequence. Qa2 was best. } (24... Qa2 25. f4 Rxf4 26. Qa3 Bxd2+ 27. Nxd2 Qxa3 28. Kd1 e3 29. Nb3 Qxb3+ 30. Ke1 Qb1#) 25. Kxd2 Qa2+ 26. Kc3 Rf3 27. Qxc7?? { (-5.38 → Mate in 13) Checkmate is now unavoidable. Kb4 was best. } (27. Kb4 Bf1) 27... Bxc4+ { White resigns. } 0-1