Knight endgames can be very tricky, especially when there are passed pawns involved.
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[Event "rated untimed match"] [Site "Moskva"] [Date "1977.??.??"] [Round "?"] [White "Bukic"] [Black "Romanisin"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [ECO "A00"] [FEN "6k1/p2r1p1p/3pbQp1/q1r2p2/2P5/1P3B2/P4PPP/R2R2K1 w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. b4 Qxb4 2. Rdb1 Qxc4 3. Be2 { Getting the black queen off the file. } 3... Qc2 ( { Black can try: } 3... Qc3 4. Rb8+ Rc8 5. Qxc3 Rxb8 { White wins with a large material advantage. } ) 4. Bd3 Qxb1+ 5. Rxb1 { White wins with a large material advantage. } 1-0