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 "Unknown48"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "8/p3kppp/P3n3/R2pPP2/2q3Q1/1p5P/6PK/8 b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... b2 2. Qxc4 dxc4 3. Rb5 c3 4. Rb7+ Ke8 5. fxe6 fxe6 6. Rxa7 b1=Q 7. Rxg7 Qe4 8. a7 c2 9. Rg8+ Kf7 10. a8=Q Qxa8 11. Rxa8 c1=Q { Black wins with a large material advantage. } 0-1