[Event "USA-ch"]
[Site "Estes Park, CO USA"]
[Date "1985.10.??"]
[EventDate "?"]
[Round "5"]
[Result "1/2-1/2"]
[White "Boris Kogan"]
[Black "De Firmian, Nick E"]
[ECO "A04"]
[WhiteElo "2500"]
[BlackElo "2540"]
[PlyCount "22"]

1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O Nf6 5. c4 Nc6 6. b3 e6 7. Bb2 Be7 8. e3  O-O 9. Nc3 Rc8 10. Rc1 d5 11. d3 dxc4 1/2-1/2