[Event "Piatigorsky-Cup 2nd"]
[Site "Santa Monica"]
[Date "1966.08.11"]
[Round "16"]
[White "Portisch, Lajos"]
[Black "Donner, Jan Hein"]
[Result "1-0"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O d5 9. cxd5 exd5 10. Be3 Re8 11. Rc1 Bg4 12. Qb3 Bxc3 13. Rxc3 Nxd4 14. Bxd4 Bxe2 15. Rfc1 Ne4 16. Rc7 Ba6 17. Qf3 Ng5 18. Qf5 Bc4 19. Rxb7 1-0