[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1972.01.16"]
[Round "5"]
[White "Portisch, Lajos"]
[Black "Ivkov, Borislav"]
[Result "1-0"]
1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 h6 6. Bh4 O-O 7. Rc1 b6 8. cxd5 Nxd5 9. Nxd5 exd5 10. Bxe7 Qxe7 11. Be2 a5 12. Bf3 Qb4+ 13. Qd2 c6 14. Rc3 Qd6 15. Ne2 Nd7 16. O-O Bb7 17. Nf4 Rfd8 18. Rfc1 Rab8 19. h4 c5 20. dxc5 Nxc5 21. Qd4 Rd7 22. Bg4 Re7 23. Bf5 Rd8 24. Rd1 Re5 25. Bb1 Qe7 26. Ne2 Re8 27. a3 Ba6 28. Ng3 Bc4 29. Bc2 a4 30. Nf5 Qf6 31. Nd6 Qxd6 32. Rxc4 Qc7 33. Rc3 Qe7 34. g3 Qf6 35. Qf4 Qc6 36. Rd4 Qb5 37. Rb4 Qe2 38. Rxb6 Ne4 39. Rc7 R5e7 40. Rxe7 Rxe7 41. Rb8+ Kh7 42. Bxe4+ 1-0