[Event "USA-ch/Zonal"]
[Site "South Bend"]
[Date "1981.??.??"]
[Round "10"]
[White "Christiansen, Larry Mark"]
[Black "Byrne, Robert Eugene"]
[Result "1/2-1/2"]
[WhiteElo "2515"]
[BlackElo "2510"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. Rc1 Bb7 9. Be2 Nbd7 10. O-O c5 11. cxd5 Nxd5 12. Bg3 N7f6 13. Nxd5 Qxd5 14. dxc5 Bxc5 15. Qa4 Bc6 16. Qa6 Bb7 17. Qa4 Bc6 18. Qh4 Qe4 19. b4 Be7 20. Qxe4 Bxe4 21. a3 a5 22. Be5 1/2-1/2