The position after Black's move 21, when the game still felt even. The next move (22. Nd4 Ra7) seems to be a mistake by Black because it allows me to fork the Queen at d8 and the Rook at a7. Here's the full game (apologies if my notation is wrong anywhere): 1. d4 Nf6, 2. Nc3 Nc6, 3. e4 d6, 4. d5 Bg4, 5. Be2 Bxe2, 6. Nxe2 Ne5, 7. Bd2 Nc4, 8. b3 Nxd2, 9. Qxd2 a5, 10. a4 h5, 11. Qd3 g5, 12. Nb5 Bg7, 13. Rd1 0-0, 14. 0-0 Rb8, 15. Qc3 Nxe4, 16. Qxa5 b6, 17. Qb4 Nf6, 18. c4 Ra8, 19. Rde1 Ne4, 20. f3 Nf6, 21. Qd2 Nh7, 22. Nd4 Ra7, 23. Nc6 Qa8, 24. Nxa7 Qxa7, 25. Nd4 Bxd4, 26. Qxd4 Re8, 27. Qd3 b5+, 28. Re3 bxc4, 29. bxc4 Qa4, 30. Qa3 Qxc4, 31. Rc1 Qxd5, 32. Rxc7 Qd1+, 33. Kf2 Qd2+, 34. Kf1 Qd1+, 35. Re1 Qd2, 36. Re7 Qd1+, 37. Kf2 Qd2+, 38. Kg3 h4+, 39. Kh3 Rxe7, 40. Rxe7 d5, 41. Qa8+ Kg7, 42. Qb7 Nf6, 43. Rf7+ Kg6, 44. Rg7+ Kf5, 45. Qc8+ Ke5, 46. Re7+ Kf4, 47. Qc7+ Kf5, 48. Qe5+ Kg6, 49. Re6 g4+, 50. fxg4 Qd3+, 51. Kxh4 d4, 52. Qf6+ Kh7, 53. Re7+ Kg8, 54. Qg7#