[Event "ACM 1973"] [Site "Atlanta USA"] [Date "1973.08.28"] [Round "4"] [White "CHAOS"] [Black "Chess 4.0"] [Result "0-1"] [WhiteElo "?"] [BlackElo "?"] [Variant "Standard"] [TimeControl "-"] [ECO "D29"] [Opening "Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 { D29 Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line } 9. Nc3 Nbd7 10. Bd2 Bd6 11. Rfe1 cxd4 12. exd4 O-O 13. Bg5 Qb6 14. Bc2 Bxf3 15. Qxf3 Qxd4 16. Rad1 Qb4? { (-0.79 → 0.65) Mistake. Qc5 was best. } (16... Qc5 17. Ne4 Qxc2 18. Rxd6 Nxe4 19. Qxe4 Qxe4 20. Rxe4 Nc5 21. Re2 h6 22. Be3 Ne4 23. Rd1) 17. g3?? { (0.65 → -1.20) Blunder. Re2 was best. } (17. Re2 Rac8) 17... Qxb2 18. Re2 Qa3 19. Qc6 Bb4? { (-1.60 → -0.34) Mistake. Be7 was best. } (19... Be7 20. Bc1) 20. Rxd7? { (-0.34 → -1.67) Mistake. Nb1 was best. } (20. Nb1 Qa5 21. a3 Bxa3 22. Nxa3 Qxa3 23. Rxd7 Nxd7 24. Qxd7 Qc3 25. Qd1 Rac8 26. Qb1 h6) 20... Rac8 21. Rc7 Rxc7 22. Qxc7 Qxc3 23. Qb7 Qc4?! { (-2.10 → -1.46) Inaccuracy. Nd5 was best. } (23... Nd5 24. Be4 Qc4 25. Bf3 h6 26. Be3 a5 27. Kg2 Bc3 28. Qd7 a4 29. Bc1 Ba5 30. Bb2) 24. Bd1?? { (-1.46 → -6.36) Blunder. Qf3 was best. } (24. Qf3 Nd5 25. Bb3 Qc6 26. Rc2 Qd6 27. Qd3 h6 28. Bxd5 exd5 29. Be3 Qe6 30. Rc1 Rd8) 24... Rd8?! { (-6.36 → -4.22) Inaccuracy. Qd3 was best. } (24... Qd3) 25. Re5?? { (-4.22 → Mate in 10) Checkmate is now unavoidable. Bd2 was best. } (25. Bd2 h6 26. Bxb4 Rxd1+ 27. Re1 Rxe1+ 28. Bxe1 Qxa2 29. Qe7 Qb1 30. Qb4 Qxb4 31. Bxb4 Nd5) 25... Rxd1+ 26. Kg2 Qf1+ 27. Kf3 Qh1+ 28. Ke2 Re1+ 29. Kd3 Qf1+ 30. Kd4 Qc4# { Black wins by checkmate. } 0-1