[Event "World op 18th"]
[Site "Philadelphia"]
[Date "1990.??.??"]
[Round "?"]
[White "Colias, Billy"]
[Black "Christensen, Wayne"]
[Result "1-0"]
[EventArchiveKey "world-open-1990"]
[WhiteElo "2290"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 Nh5 5. g3 f5 6. e4 O-O 7. Bg2 c5 8. d5 fxe4 9. fxe4 Qf6 10. Qc2 Qd4 11. Nf3 Bxc3+ 12. bxc3 Qf6 13. e5 Qd8 14. O-O d6 15. dxe6 dxe5 16. Bg5 Nf6 17. Nxe5 Qc7 18. Bd5 Nxd5 19. Rxf8+ Kxf8 20. Qxh7 1-0