In Fischer's hands, a slight theoretical advantage is as good a being a Queen ahead.
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[Event "rated untimed match"] [Site "USSR"] [Date "1975.??.??"] [Round "?"] [White "Abrosimov"] [Black "Ambajnis"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "1r1r3k/4N1pp/1p1Pqp2/3Rp3/3n4/8/P4PPP/1Q1R2K1 w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. R1xd4 exd4 2. Qxh7+ Kxh7 3. Rh5# 1-0