[Event "Tallinn"] [Site "?"] [Round "0"] [White "Spassky"] [Black "Tal"] [Result "0-1"] [ECO "E30"] [Opening "Nimzo-Indian: Leningrad, 4...h6"] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 {A line which Spassky favored for many years even though White has no real chance to gain an advantage against best play.} 4... h6 5. Bh4 c5 6. d5 b5 {Tal decides to make a fight of the game, casting aside the more prosaic 6...d6 .} 7. dxe6 fxe6 8. cxb5 d5 { The investment of a pawn has gained Black a very strong central pawn wedge.} 9. e3 {The threat was 9...d4.} 9... O-O { The f-file now is available for attacking operations.} 10. Nf3 { 10.Bd3 is considered stronger.} 10... Qa5 11. Bxf6 Rxf6 12. Qd2 a6 {A typical i dea in formations where the b-pawn has been sacrificed. Black wants to open up more lines and diagonals.} 13. bxa6 Nc6 {There is no need to capture the pawn at a6. Now that it is out of the way Black is able to bring the knight into the game.} 14. Be2 { A critical moment. White is getting ready to castle to safety.} 14... d4 { This additional pawn sacrifice is part of a strong combination which leads to a win of material.} 15. exd4 Rxf3 { The knight defended the pawn at d4, so it is eliminated.} 16. Bxf3 cxd4 { Now the pin on the a5-d1 diagonal is exploited.} 17. O-O dxc3 18. bxc3 Bxc3 { This fork of queen and rook was foreseen by Tal many moves back.} 19. Qd6 Rxa6 {Now if the rook moves then 20...Nd4 will create tremendous problems for White. } 20. Bxc6 Bb4 {This is the finishing touch of the combination, preventing the White queen from moving to e7.} 21. Qb8 Rxc6 22. Rac1 {Black has two powerful bishops for the rook, but his position has some holes in it.} 22... Bc5 23. Rc2 Qa4 24. Qb3 Qf4 25. Qg3 {A serious miscalculation. 25.Qf3 Qxf3 26. gxf3 e5 27. Kh1 Bb7 28.Rb1 Rb6 29.Rxb6 Bxf3+ 30.Kg1 Bxb6 31.a4 might have been better, as suggested by Viktor Korchnoi.} 25... Qf5 26. Rfc1 Bb7 27. Qf3 { 27.Qb8+ Kh7 28.Qxb7 Bxf2+ 29.Rxf2 Rxc1+ 30.Rf1 Rxf1++} 27... Qg5 28. Qb3 Rc7 { Black has regrouped effectively and is ready for the final assault on the White king.} 29. g3 { Now we have a combination of an x-ray and a skewer along the c-file.} 29... Bxf2+ 30. Kxf2 {30.Rxf2 Rxc1+ 31.Rf1 Qc5+} 30... Qf6+ 31. Ke1 Qe5+ 32. Kf1 { 32.Kd1 Qd4+ 33.Ke1 Qg1+} 32... Ba6+ 33. Kg1 Qd4+ 34. Kg2 Qe4+ 35. Kg1 { 35.Kh3 Rxc2 36.Qxc2 Bf1+ 37.Rxf1 Qxc2} 35... Bb7 36. h4 Qh1+ 37. Kf2 Rf7+ 38. Ke2 Qe4+ 0-1