[Event "World op"]
[Site "Philadelphia"]
[Date "1988.??.??"]
[Round "?"]
[White "Blocker, Calvin"]
[Black "Mercere, W"]
[Result "1-0"]
[WhiteElo "2390"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 c6 5. d6 Bxd6 6. Bg2 O-O 7. d3 Be6 8. Nge2 Nbd7 9. h3 Nd5 10. Ne4 Be7 11. g4 f5 12. gxf5 Bxf5 13. O-O Nf4 14. Bxf4 exf4 15. Nd4 Ne5 16. Nxf5 Rxf5 17. Bf3 Bh4 18. Bg4 Rg5 19. Nxg5 Qxg5 20. Kh1 f3 21. Bxf3 Rf8 22. Bg2 Bxf2 23. d4 Ng6 24. Qe2 Qg3 25. Qe6+ Kh8 26. Qg4 Qe3 27. Rad1 Nf4 28. Qf3 1-0