Knight endgames can be very tricky, especially when there are passed pawns involved.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown10"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "5k1r/p7/1p3PQ1/3p3p/3q4/5R2/P1r1RKPP/8 w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. Kg3 ( { White can try: } 1. Kf1 Rc1+ 2. Re1 Rxe1+ 3. Kxe1 Qe4+ 4. Qxe4 dxe4 5. Rf4 { Draw. } ) 1... Qg4+ 2. Qxg4 hxg4 3. Rxc2 gxf3 4. Rc8+ Kf7 5. Rxh8 { White wins with a large material advantage. } 1-0