Viktor Korchnoi

No Chess Grandmaster is normal; they only differ in the extent of their madness.

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[Event "rated untimed match"]
[Site "Groningen"]
[Date "1946.??.??"]
[Round "?"]
[White "Bernstein"]
[Black "Kotov"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "R6R/1r3pp1/4p1kp/3pP3/1r2qPP1/7P/1P1Q3K/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]

1. f5+ exf5 2. Qxh6+ gxh6 3. Rag8# 1-0