The passed Pawn is a criminal that must be kept under lock and key. Mild measures, such as police surveillance, are not sufficient.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown362"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "Q7/5ppk/7p/2pPp1q1/2P1P3/2N1b3/1Q4PP/4n2K b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Bd2 2. g3 Qf6 3. Kg1 ( { White dare not try: } 3. Qxd2 Qf1# ) 3... Be3+ 4. Kh1 Qf1# 0-1