Knight endgames can be very tricky, especially when there are passed pawns involved.
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[Event "rated untimed match"]
[Site "?"]
[Date "2003.??.??"]
[Round "?"]
[White "Harald Van Der Heijden"]
[Black "Study"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/8/5p2/8/4P1P1/8/5k1K/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Kh1 ( { White can try: } 1. g5 fxg5 2. Kh3 Kf3 3. e5 g4+ 4. Kh4 Kf4 5. e6 g3 6. Kh3 Kf3 7. e7 g2 8. e8=Q g1=Q 9. Qf7+ Ke2 { Draw. } ) ( { White can also try: } 1. e5 fxe5 2. g5 e4 3. g6 e3 4. g7 e2 5. g8=Q e1=Q 6. Qf7+ Ke2 7. Qe6+ Kf2 8. Qxe1+ Kxe1 { Draw. } ) ( { White can also try: } 1. Kh3 Kf3 2. e5 fxe5 3. g5 e4 4. g6 e3 5. g7 e2 6. g8=Q e1=Q 7. Qf7+ Ke2 8. Qe6+ Kf2 9. Qxe1+ Kxe1 { Draw. } ) 1... Kf3 2. e5 ( { White dare not try: } 2. g5 fxg5 3. e5 Kf2 4. e6 g4 5. e7 g3 6. e8=Q g2+ 7. Kh2 g1=Q+ 8. Kh3 Qg3# ) 2... fxe5 3. g5 e4 ( { Black can try: } 3... Kf2 4. g6 e4 5. g7 e3 6. g8=Q e2 7. Qg1+ Kf3 8. Qe1 Ke3 9. Kg2 Kd3 10. Kf2 Kd4 11. Qxe2 { White wins with a large material advantage. } ) 4. Kg1 e3 5. Kf1 Ke4 6. g6 Kd3 7. Ke1 Ke4 8. g7 Kf3 9. g8=Q { White wins with a large material
advantage. } 1-0