Do you realize Fischer almost never has any bad pieces? He exchanges them, and the bad pieces remain with his opponents.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown041"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "1r1qkr2/pppnn1bp/3pB1p1/6p1/3PP3/1QN4P/PPP3P1/R4RK1 w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. Bf7+ Rxf7 2. Qxf7# 1-0