[Event "URS-ch39 Semifinal"]
[Site "Ivano Frankivsk"]
[Date "1971.05.??"]
[Round "?"]
[White "Grigorian, Levon Ashotovich"]
[Black "Kogan, Boris Markovich"]
[Result "0-1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 c6 8. O-O-O a6 9. e4 dxc4 10. Bxc4 h6 11. e5 Nd5 12. Bxe7 Qxe7 13. Ne4 N7b6 14. Bb3 a5 15. a3 Bd7 16. g3 Rfc8 17. Qd3 c5 18. Nxc5 Na4 19. Bc2 g6 20. Ne4 b5 21. Nd6 Rcb8 22. Bxa4 bxa4 23. Nd2 Qd8 24. Kb1 Qb6 25. N2c4 Qa6 26. Qf3 Be8 27. Rd2 Rb3 28. Qe4 Nc3+ 0-1