Kogan, Boris vs De Firmian, Nick

Estes Park ch-USA · Round 1 · 1985.01.01 · 1/2-1/2 · A30 Zukertort Opening: Sicilian Invitation

Moves

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.

PGN

[Event "Estes Park ch-USA"]
[Site "Estes Park ch-USA"]
[Date "1985.01.01"]
[Round "1"]
[White "Kogan, Boris"]
[Black "De Firmian, Nick"]
[Result "1/2-1/2"]
[PlyCount "22"]
[WhiteElo "2235"]
[WhiteFideId "2804352"]
[BlackElo "2540"]
[BlackFideId "2000105"]
[BlackTitle "GM"]
[ECO "A30e"]
[Source "MillionBase2.9"]
[SourceQuality "4"]
[ImportDate "2026-01-06"]

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