[Event "Alekhine memorial"]
[Round "13"]
[Site "Moscow"]
[Date "1971.12.12"]
[White "Spassky, Boris V"]
[WhiteElo "2690"]
[Black "Stein, Leonid"]
[BlackElo "2605"]
[Result "1/2-1/2"]
[ECO "D86"]
[Opening "Gruenfeld, Exchange, Classical Variation"]
 1. d4   Nf6
 2. c4   g6
 3. Nc3  d5
 4. cxd5 Nxd5
 5. e4   Nxc3
 6. bxc3 Bg7
 7. Bc4  c5
 8. Ne2  O-O
 9. O-O  Nc6
10. Be3  Qc7
11. Rc1  Rd8
12. h3   b6
13. f4   e6
14. Qe1  Na5
15. Bd3  f5
16. g4   Bb7
17. Ng3  Qd7
18. gxf5 cxd4
19. fxe6 Qxe6
20. f5   Qe7
21. cxd4 Rxd4
22. Bxd4 Bxd4+
23. Kg2  Be5
24. Qe3  Rd8
25. Rf3  Qh4
26. fxg6 Bxg3
27. Rxg3 Rxd3
28. Rc8+ Bxc8
29. gxh7+ Kxh7
30. Qxd3 Qf6
1/2-1/2