C43: Petroff Defence: 3 d4

1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 White threatens to win material: e5xf6 4... Ne4 5. Qxd4 d5 6. exd6 Nxd6 Black king safety dropped. . 7. Nc3 Nc6 Black threatens to win material: Nc6xd4 8. Qf4 White has an active position 8... Bf5 Black threatens to win material: Bf5xc2 9. Bb5 Bd7 9... Qe7+ 10. Kf1+/= 10. O-O+/- White castles and improves king safety 10... Be7 11. Bxc6 11. Re1 O-O+/- 11... Bxc6+/= Black has the pair of bishops 12. Ne5 O-O 13. Nxc6 bxc6 14. Be3 h6 14... Re8 15. Qf3+/= 15. Rad1 15. Qf3 Qd7+/- 15... Bg5+/= 16. Qf3 Bxe3 17. Qxe3 Qf6 18. Qd4 18. Qc5 Nb5+/= 18... Qf5 Black threatens to win material: Qf5xc2 19. Rfe1 Rfe8 20. Rxe8+ Rxe8 21. Qd3 Qxd3 Black has a mate threat 22. cxd3 Black has a new backward pawn: c6 22. Rxd3?? Re1# 22... Nf5 23. Kf1 Nd4 The knight is not easily driven from d4 24. Re1 Rd8 25. Re4 Kf8 26. Na4 Rd5 27. Nc3 White threatens to win material: Nc3xd5 27... Rd6 27... Rd8 28. Re5+/= 28. f3 28. Re5 Nc2= 28... f6 29. Kf2 a5 30. Na4 Nc2 31. Nc5 Nb4 32. a3 32. d4!?+/= is an interesting alternative 32... Nxd3+=/+ 33. Nxd3 Rxd3 A rook endgame occured 34. Ra4 White threatens to win material: Ra4xa5 34... Rd2+ Black forks: b2+f2 35. Kg3 Rxb2 36. Rxa5 White has a new passed pawn: a3. Black has a new passed pawn: c6. 36... Ke7 37. Rc5 37. Ra8!?=/+ 37... Kd6-/+ 38. Rc3 c5 39. a4 39. h4 Kd5-/+ 39... Kd5 39... Ra2 40. Rd3+ Kc6 41. Re3-+ 40. Rd3+ Kc4 41. Rd7 Rb7 42. Rxg7 Kb3 43. Rf7? >= 43. Re7-/+ 43... c4-+ 44. Rxf6 c3 45. Rxh6 Rb6 45... c5 makes it even easier for Black 46. Re6 c2 47. Re1-+ 46. Rh5 Rc6 47. Rb5+ Kxa4 47... Kxa4 48. Rb1 c2-+ 0-1 [Fritz 9 (5s)]