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 "1957.??.??"]
[Round "?"]
[White "Kunde"]
[Black "Kamphenkel"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "N4rk1/ppQ2ppp/3q1n2/3ppb2/3n4/P4P2/1PP3PP/2KR1BNR b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Rc8 2. Qxd6 Rxc2+ 3. Kb1 Rc1+ 4. Kxc1 ( { White can try: } 4. Ka2 Bb1+ 5. Ka1 Nb3# ) 4... Nb3# 1-0