[Event "Goteborg m"] [Site "Goteborg m"] [Round "7"] [White "Bronstein"] [Black "Keres"] [Result "1-0"] [ECO "E41"] [Opening "Nimzo-Indian: 4.e3 c5 5.Bd3"] {A long term Bishop sacrifice} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 b6 6. Nge2 Bb7 7. O-O cxd4 8. exd4 O-O 9. d5 h6 10. Bc2 Na6 11. Nb5 exd5 12. a3 Be7 13. Ng3 dxc4 14. Bxh6 $3 {The consequences of this move are hardly calculable over the board. This is not so much a combination but as a genuine sacrifice. The definitie aspect of a combination is the fact that all the variations can be concretely visualized; a real sacrifice on the other hand is to a large extent based on general considerations. In addition to precise calculation, feeling for the position now plays an important part. In the present instance it seems that White has calculated only that he was certain to win a second pawn on h6. For the rest, it was a matter of instinct} 14... gxh6 15. Qd2 Nh7 (15... Kg7 16. Nf5+ $18) (15... Ng4 16. h3 Bg5 (16... Ne5 17. Qxh6 Ng6 18. Nh5 Bf6 19. Rad1 d5 20. Rd4 $1 $18) 17. f4 Bh4 18. Nf5 $18 { recovering the sacrificed piece with a winning position}) (15... Re8 16. Qxh6 Bf8 17. Qg5+ Kh8 18. Nd6 Bxd6 19. Nh5 $18 {annihilating attack}) (15... Nc5 16. Qxh6 Nce4 17. Rae1 d5 18. Nf5 Ne8 19. Bxe4 dxe4 20. Re3 $18 { White's attack is too strong}) 16. Qxh6 f5 {Thus Black gains himself some elbow room, but he is still unable to put together a satisfactory defence} 17. Nxf5 Rxf5 (17... Rf6 18. Nxe7+ Qxe7 19. Bxh7+ {removing the guard}) (17... Rf7 18. Nfd6 Bxd6 19. Nxd6 $18) 18. Bxf5 Nf8 19. Rad1 {The issue is already beyond doubt. White has regained his sacrificed material, and meanwhile the Black King's defences have been utterly destroyed} 19... Bg5 20. Qh5 Qf6 21. Nd6 Bc6 22. Qg4 Kh8 23. Be4 Bh6 24. Bxc6 dxc6 25. Qxc4 Nc5 26. b4 Nce6 27. Qxc6 Rb8 28. Ne4 Qg6 29. Rd6 Bg7 30. f4 Qg4 31. h3 Qe2 32. Ng3 Qe3+ 33. Kh2 Nd4 34. Qd5 Re8 35. Nh5 Ne2 36. Nxg7 Qg3+ 37. Kh1 Nxf4 38. Qf3 Ne2 39. Rh6+ 1-0