Pietzsch, Wolfgang VS Petrosian, Tigran V 1960.08.??

[Event "Copenhagen Nimzowitsch Memorial"]
[Site "Copenhagen"]
[Date "1960.08.??"]
[Round "?"]
[White "Pietzsch, Wolfgang"]
[Black "Petrosian, Tigran V"]
[Result "0-1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 d6 5. e4 Bg7 6. Bg5 e6 7. dxe6 Bxe6 8. f4 Qb6 9. Qd2
O-O 10. Nf3 Qb4 11. a3 Qb3 12. Qc1 Nc6 13. Bd3 Nd4 14. Nd2 Qb6 15. O-O Nb3 16. Qd1 Nxa1
17. Qxa1 Rae8 18. f5 Bd7 19. Kh1 Bc6 20. Qc1 Qc7 21. Nd5 Bxd5 22. exd5 Nd7 23. f6 Bh8 24.
h4 Qd8 25. Ne4 Rxe4 26. Bxe4 Bxf6 0-1