PetrovC43

Em Lasker
H. B. Daly

Boston City Club Simul
1924


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. Bg5 White threatens to win material: Bg5xd8 7... f6 Black threatens to win material: f6xg5 8. Bf4 Nc6 9. Qe3+ Qe7 White has an active position 10. Nc3 Qxe3+ 11. fxe3 Be6 12. Bb5 Bd7 13. O-O-O O-O-O 14. Ba4 Re8 15. Nd5 Re4 16. Bb3 16. b3 h5= 16... Na5 17. Nd4 17. Rd2!?= is noteworthy 17... c5-/+ 18. Nc3 >= 18. Bxd6!? Bxd6 19. Nf3-/+ 18... cxd4-+ 19. Nxe4 Nxb3+ 20. axb3 Nxe4 21. Rxd4 Bc6 22. b4 a6 23. h4 23. Rhd1 Be7-+ 23... Be7 24. h5 Re8 25. Rh4 25. Rh2 f5-+ 25... f5 26. Rh1 26. Rh2 Bd8-+ 26... b5 26... Bf6!? keeps an even firmer grip 27. Rc4-+ 27. Rg1 27. Rf1 Nf6 28. Bd6 Nd5 (28... Bxg2?! 29. Rxf5 h6 30. Rc5+ Kd7 31. Bxe7+ Kxe7 32. Re5+ Kf8 33. Rxe8+ Kxe8 34. Rd6-/+) 29. Bxe7 Nxe3-+ (29... Rxe7?! 30. Rxf5 Nxe3 31. Rf8+ Kc7 32. g3-/+) (29... Nxe7?! 30. Rfd1-+) 27... Bd8 27... Nf6 28. Rh1-+ 28. g4 28. Rd3 g5 29. hxg6 hxg6-+ 28... Bb6 28... fxg4!? might be the shorter path 29. Rxg4 Bf6 30. c3-+ 29. gxf5 29. Rd3 fxg4 30. Rxg4 Re7-+ 29... Bxd4 30. exd4 Re7 30... Rf8!? 31. Rxg7 Rxf5 32. Rc7+ Kd8 33. Rxc6 Rxf4 34. b3-+ 31. Be5 Rf7 32. Rxg7 Rxf5 32... Rxg7 33. Bxg7 Ng3 34. f6-/+ 33. c4 33. b3!? Be8 34. Rxh7 Bxh5 35. Rc7+ Kd8 36. Rc6=/+ 33... Be8 34. h6? >= 34. c5 Bf7 35. b3-/+ 34... Rf7?? an unfortunate move that relinquishes the win >= 34... bxc4 it becomes clear that Black will call all the shots 35. Kb1 Ba4-+ 35. Rg8 White pins: Rg8xe8 35... Kd7 36. c5 White wins space 36... Nf6 36... Rf1+ 37. Kc2 Nf6 38. Rg7+ Ke6 39. Ra7-/+ 37. c6+ Kxc6 38. Bxf6 Eliminates the defender f6 38... Rxf6 39. Rxe8 Rxh6 39... Rxh6 40. Re5 Rh4=/+ 1/2-1/2 [Fritz 9 (5s)]