[Event "Interzonal-08"]
[Site "Palma de Mallorca"]
[Date "1970.12.07"]
[Round "20"]
[White "Ivkov, Borislav"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
1. c4 g6 2. d4 Nf6 3. Nc3 Bg7 4. e4 d6 5. f3 c6 6. Be3 O-O 7. Qd2 a6 8. a4 a5 9. Bd3 e5 10. Nge2 Na6 11. Rd1 Re8 12. O-O Nd7 13. Bb1 Qc7 14. Kh1 Bf8 15. h3 exd4 16. Nxd4 Nac5 17. Bc2 Qb6 18. b3 Nf6 19. Rfe1 Qc7 20. Bh6 Be7 21. Bg5 Be6 22. f4 Rad8 23. Qf2 Bc8 24. Ndb5 Qb8 25. Nxd6 Rxd6 26. Rxd6 Bxd6 27. Bxf6 Nd7 28. Bd4 Bb4 29. Qf3 c5 30. Bg1 Bxc3 31. Qxc3 Qxf4 32. Qxa5 b6 33. Qc3 Bb7 34. Bh2 Qg5 35. Qe3 Qxe3 36. Rxe3 f5 37. e5 Kf7 38. Kg1 Nf8 39. Kf2 Rd8 40. Rd3 Rxd3 41. Bxd3 Ke6 42. Bf4 1/2-1/2