[Event "It (open)"] [Site "Tulsa (USA)"] [Round "4"] [White "Berger Jacob V (USA)"] [Black "Blair David"] [Result "1-0"] [WhiteElo "1947"] [ECO "B03"] [Opening "Alekhine: 4.c4 Nb6"] 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.exd6 exd6 6.Nf3 Bg4 7.Be3 Be7 8.Bd3 Nc6 9.Nbd2 Nb4 10.Bb1 c5 11.O-O O-O 12.a3 Nc6 13.Qc2 f5 14.Ba2 f4 15.Qe4 fxe3 16.Qxg4 exd2 17.Bb1 Rf7 {#r} 1-0