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 "Unknown278"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "8/1p3k1p/2p2P2/1p1p4/1P1Bp1Pb/4P3/1P2K1R1/r7 w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. Rh2 Bxf6 2. Rf2 Kg6 3. Rxf6+ Kg5 4. Rf7 Kxg4 5. Rxh7 { White wins with a large material advantage. } 1-0