[Event "WchT U26 02 prel-4"]
[Site "Mexico City"]
[Date "1980.08.23"]
[Round "5"]
[White "Blocker, Calvin"]
[Black "Lopez, Rui"]
[Result "1-0"]
[WhiteElo "2365"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. f3 d5 7. e3 Re8 8. cxd5 exd5 9. Bd3 c5 10. Ne2 c4 11. Bc2 Nbd7 12. O-O Nf8 13. g4 Bxg4 14. fxg4 Nxg4 15. Rf3 Qh4 16. h3 Nh6 17. Bd2 Ne6 18. Qf1 Ng5 19. Rg3 Re4 20. Qg2 f6 21. Rxg5 fxg5 22. Be1 1-0