[Event "Moscow Zonal"]
[Site "Moscow"]
[Date "1964.??.??"]
[Round "3"]
[White "Korchnoi, Viktor Lvovich"]
[Black "Stein, Leonid"]
[Result "1/2-1/2"]
[ECO "D93"]
[Opening "Grünfeld Defense: Three Knights Variation, Hungarian Variation"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3 c5 7. dxc5 Qa5 8. Rc1 Rd8 9. Qa4 Qxc5 10. b4 Qc6 11. Qxc6 bxc6 12. Bc7 Rd7 13. Ba5 Ne4 14. Nxe4 dxe4 15. Ng5 c5 16. Nxe4 cxb4 17. Bxb4 Na6 18. Bc3 Bb7 19. Bxg7 Kxg7 20. Nc3 Rad8 21. f3 Rd2 22. Be2 Nb4 23. Nd5 Rb2 24. Nxb4 Rxb4 25. Kf2 Rd2 26. Rb1 Rxb1 27. Rxb1 Ba6 28. Rc1 Rxa2 29. f4 Bb7 30. Kf1 a5 31. c5 Bc6 32. h4 1/2-1/2