[Event "Rovinj/Zagreb"]
[Site "Zagreb"]
[Date "1970.04.24"]
[Round "11"]
[White "Petrosian, Tigran V"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]

1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Nbd2 b6 5. a3 Bxd2+ 6. Qxd2 Bb7 7. Qc2 O-O 8. e3 d6 9. b4 Nbd7 10. Bb2 Ne4 11. Bd3 f5 12. O-O Ndf6 13. d5 exd5 14. Nd4 dxc4 15. Bxc4+ d5 16. Bd3 Bc8 17. Nc6 Qe8 18. Rac1 Bd7 19. Rfe1 Rf7 1/2-1/2