[Event "USA-ch"]
[Site "Mentor"]
[Date "1977.09.27"]
[Round "3"]
[White "Christiansen, Larry Mark"]
[Black "Grefe, John Alan"]
[Result "1/2-1/2"]
[WhiteElo "2460"]
[BlackElo "2425"]

1. e4 c5 2. c3 e6 3. Nf3 d5 4. exd5 exd5 5. d4 Nc6 6. Bb5 Bd6 7. Be3 Qb6 8. dxc5 Bxc5 9. Bxc5 Qxc5 10. Na3 Ne7 11. O-O O-O 12. h3 Bf5 13. Bd3 d4 14. cxd4 Nxd4 15. Rc1 Qd5 16. Nxd4 Qxd4 17. Bxf5 Nxf5 18. g4 Nh4 19. Qxd4 Nf3+ 20. Kg2 Nxd4 21. Rfd1 Rfd8 22. Rc7 b5 23. Nc2 1/2-1/2