The hardest game to win is a won game.
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[Event "rated untimed match"]
[Site "?"]
[Date "1954.??.??"]
[Round "?"]
[White "Poljak"]
[Black "Cholmow"]
[Result "*"]
[BlackElo "0"]
[FEN "r3n3/5kpB/5pN1/3b4/1qp2Q2/8/1P3PPP/4R1K1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Qd2 Qd6 ( { Black dare not: } 1... Qxd2 2. Re7# ) 2. Qxd5+ Qxd5 3. Re7# *