D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5

1. d4 d5 2. c4 2. Bf4 Nf6= 2... c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Bg6 7. Nxg6 hxg6 8. g3 Nbd7 9. Bd2 Bb4 10. Qb3 Bxc3 11. Bxc3 Weaker is 11. Qxc3 Ne4 12. Qb4 Qf6-/+ 11... Ne4 12. Bg2 Nxc3 13. Qxc3 f5 13... Nb6 14. cxd5 Nxd5 15. Qa3= 14. O-O 14. O-O-O Nf6+/= 14... Qe7 15. cxd5 exd5 16. b4 Nf6 17. Rfc1 Ne4 Black threatens to win material: Ne4xc3 18. Qb2 O-O 18... Qd7 19. a4= 19. b5+/= White threatens to win material: b5xc6 19... Rac8 20. bxc6 bxc6 21. Qe2 g5 22. Rab1 Qd7 23. Rc2 Rf6 23... g4 24. Qa6+/= 24. Rbc1 24. Qa6!?+/= is an interesting idea 24... g4= White has a new backward pawn: h2 25. Rb2 Rh6 26. Qa6 Rc7 27. Rb8+ Kh7 28. Qa3 Rb7 29. Qf8 Rxb8 30. Qxb8 Qf7 31. Qc8 Attacking the backward pawn on c6 31... Qh5 Black threatens to win material: Qh5xh2 32. Kf1 Nd2+ 33. Ke1 Nc4 33... Qxh2?? taking the pawn is naive 34. Qxf5+ Kh8 35. Kxd2+- 34. Bf1 34. Rxc4 dxc4 35. Bxc6 Rf6= 34... Rf6 34... Qf7!?=/+ 35. Bxc4= dxc4 36. Rxc4 Qxh2 37. Ke2 Qh1 38. Rc5 White threatens to win material: Rc5xf5. 'the rook is the rook!' 38... Qb1 Black threatens to win material: Qb1xa2 39. Qa6 White threatens to win material: Qa6xa7 Less advisable is 39. Rxc6 Qb5+ 40. Rc4 Ra6=/+ 39... Qb2+ 40. Kf1 Qb1+ 41. Ke2 Qb2+ 42. Kf1 Twofold repetition 42... Rh6 43. Qd3 43. Rxc6 allows the opponent a nice mating combination 43... Rh2 44. Rh6+ gxh6 45. Qxa7+ Kg6 46. Qa6+ Kh5 47. Qe2 Qc1+ 48. Qe1 Rh1+ 49. Ke2 Rxe1+ 50. Kd3 Rd1+ 51. Ke2 Qc2# 43. Qxa7?? is refuted by the following interesting mate 43... Rh2 44. Qxg7+ Kxg7 45. Rxf5 Qb1+ 46. Ke2 Qc2+ 47. Ke1 Rh1# 43... g6 44. Qb3 White threatens to win material: Qb3xb2 44. Rxc6 is refuted with a beautiful mate 44... Rh1+ 45. Kg2 Qa1 46. Rc7+ Kh6 47. Qb1 Qxb1 48. Rh7+ Kxh7 49. e4 Qf1# 44... Rh1+ 45. Kg2 Rh2+ 46. Kxh2 Qxf2+ Black skewers: g3 47. Kh1 Qf1+ 1/2-1/2 [Fritz 9 (5s)]