Victory goes to the player who makes the next-to-last mistake.
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[Event "rated untimed match"]
[Site "?"]
[Date "1950.??.??"]
[Round "?"]
[White "Gollan"]
[Black "Stif"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "4Q2r/1b4pk/p1n1pr1p/1p2P2B/1qn5/5N2/PPP2PP1/2KRR3 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ With black threatening mate on the move, how does white turn the tables? } 1. Ng5+ { A check that opens the h-file. } 1... hxg5 2. Bg6+ { Further opening the
h-file. } 2... Rxg6 3. Rh1+ Rh6 4. Rxh6+ gxh6 ( { Black can try: } 4... Kxh6 5. Rh1# ) 5. Qf7# 1-0