[Event "Mar del Plata International-27"]
[Site "Mar del Plata"]
[Date "1966.03.23"]
[Round "10"]
[White "Portisch, Lajos"]
[Black "Smyslov, Vassily V"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 b6 7. O-O Bb7 8. Na4 cxd4 9. exd4 Qc7 10. a3 Be7 11. b4 a5 12. b5 d6 13. Re1 Re8 14. Bb2 Nbd7 15. Rc1 Bf8 16. Nc3 g6 17. Ne4 Nxe4 18. Bxe4 Bxe4 19. Rxe4 Bg7 20. Nd2 Rac8 21. Re2 Qb8 22. Nf1 d5 23. cxd5 Rxc1 24. Qxc1 exd5 25. Rc2 Nf8 1/2-1/2