Suddenly it was obvious to me in my analysis I had missed what Fischer had found with the greatest of ease at the board.
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[Event "rated untimed match"]
[Site "Berlin"]
[Date "1962.??.??"]
[Round "?"]
[White "Vogt"]
[Black "Alexander"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[ECO "A10"]
[FEN "5rk1/p5pp/4R3/q1pN4/1b3r2/1P1Q4/P5PP/2R4K b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... c4 2. bxc4 ( { White can try: } 2. Qd1 Qxd5 { Black's queen is immune due
to white's backrank weakness.|Black wins with a large material advantage. } ) 2... Qa3 3. Qd1 Qxc1 4. Qxc1 Rf1+ 5. Qxf1 Rxf1# 0-1