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 "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown014"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "6r1/1r1RQpk1/4p2p/4P1p1/8/P3PqP1/5P1P/3R2K1 b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Qxd1+ 2. Rxd1 Rxe7 { Black wins with a large material advantage. } 0-1