[Event "?"]
[Site "Tilburg"]
[Date "1981.??.??"]
[Round "?"]
[White "Kasparov, G"]
[Black "Andersson, U"]
[Result "1-0"]
[Annotator "Karpov, An"]

{ Queen's Indian Defense E12
Understandably, Kasparov considers this to be one his finest achievements on the chess board. } 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 { Kasparov had a fondness for this system of Petrosian's in the 1980s. } 4... Bb7 5. Nc3 Ne4 $2 { This method of seeking early exchanges is distinctly dubious. } 6. Nxe4 Bxe4 7. Nd2 $1 { From a strategical standpoint, this move refutes Black's opening. Now Black can retreat with 7...Bb7 but after 8.e4, White has a distinct positional advantage. } 7... Bg6 8. g3 { Now that the Black bishop has departed from the h1-a8 diagonal, Kasparov takes it for himself. } 8... Nc6 $6 { It would seem more appropriate to play 8...c6 9.Bg2 d5, but after 10.0-0, White has the freer and easier game to play. } 9. e3 $1 a6 { Andersson seeks counterplay with b6-b5, but his lag in development is a cause for concern. } 10. b4 $1 b5 { After 10...d5 11.Bb2 Be7 12.Rc1 Qd7 13.Bg2 0-0 14.cxd5 exd5 15.Qb3, White has a clear advantage. } 11. cxb5 axb5 12. Bb2 Na7 { Ulf Andersson has a reputation for being a very patient and solid defender, and thus a very difficult man to beat. This retreat of the knight has a view to the maneuver Na7-c8, followed by d7-d5 and Nc8-d6-c4. But White has some moves first! } 13. h4 $1 { Exploiting the misplaced "Queen's Indian bishop. " } 13... h6 $6 { Better was 13...h5. } 14. d5 $1 { A strong positional pawn sacrifice that opens the long diagonal for White's dark-squared bishop. } 14... exd5 15. Bg2 c6 16. O-O { White's compensation for his pawn is enormous - a massive lead in development, two raking bishops, and a weakness on g7 that prevents Black catching up in development in a normal manner. } 16... f6 17. Re1 $1 { The target is the Black king, with the e3-e4 break scheduled. } 17... Be7 18. Qg4 Kf7 19. h5 { Now after the inevitable exchange of light-squared bishops, White will have the g6-square at his disposal as an invasion point for his queen. } 19... Bh7 20. e4 dxe4 21. Bxe4 Bxe4 22. Nxe4 { Now there are all manner of tactics brewing against the f6 and g7 points in the Black position. } 22... Nc8 { Hoping to muster a "second rank defense "with Ra8-a7. Losing alternatives included 22...Rf8 23.Rad1 d5 24.Nxf6! when mate is unavoidable, and 22...Re8 23.Qg6+ Kf8,
when in his notes, Kasparov gives 24.g4! with the idea of Ne4-g3-f5 as winning. While this is adequate, I analyzed the following forcing continuation: 24.Ng5! hxg5 25.h6 gxh6 26.Qxh6+ Kf7 (or 26...Kg8 27.Qg6+ Kf8 (27...Kh8 28.Kg2!) 28.Kg2! - a "quiet "move when Black cannot unravel in time to meet the threat of Re1-h1-h8+.) 27.Qh7+
Kf8 28.Kg2! and now:
a) 28...Bd6 29.Qh8+ Kf7 30.Rxe8 Qae8 31.Qxf6+ Kg8 32.Qg7 mate;
b) 28...Nc8 29.Qg6 Nd6 29.Rh1 Nf7 30.Rh7, winning;
c) 28...d5 29.Bd4! c5 30.Qg6! cxd4 31.Rh1 Bd6 32.Rh7! Qc7 33.Qxf6+ Kg8 34.Rh8 mate. } 23. Rad1 Ra7 { Also hopeless is 23...d5 24.Nxf6! gxf6 (24...Bxf6 25.Qg6+ Kf8 26.Bxf6 gxf6 27.Re6! wins for White.) 25.Qg6+ Kf8 26.Bc1 Qe8 (26...Ra7 represents a transposition to the game.) 27.Bxh6+ Rxh6 28.Qxh6+ Kg8 29.Rd4, and the Black king is doomed. } 24. Nxf6 $1 gxf6 { White also wins after 24...Bxf6 25.Qg6+ Kf8 26.Bxf6 gxf6 27.Re6. } 25. Qg6+ Kf8 26. Bc1 d5 { Nor can Black defend after 26...Qe8 27.Bxh6+ Rxh6 28.Qxh6+ Kg8 29.Rd4 f5 30.Qg5+! Kh8 31.Qxf5. } 27. Rd4 Nd6 28. Rg4 Nf7 29. Bxh6+ $1 { A final knock-out punch. The bishop cannot be captured because of immediate mate. } 29... Ke8 30. Bg7 { Black Resigned 
After the forced 30...Rg8, then simply 31.h6 decides the issue. A powerful tour de force by Kasparov. } 1-0