[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1972.01.14"]
[Round "4"]
[White "Benko, Pal C"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. d4 O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3 c5 10. b3 Bf6 11. Bb2 d6 12. Rad1 Qe7 13. Qc2 Nc6 14. dxc5 Bxb2 15. Qxb2 dxc5 1/2-1/2