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 "White player"]
[Black "Black player"]
[Result "*"]
[BlackElo "0"]
[FEN "7k/7p/8/8/K7/8/8/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ An Exception to the Square Concept|This king and pawn endgame lesson
demonstrates the first of several exceptions to the secrets of endgame play.
In this case, an exception to the Square Concept.|Can White on the move
stop the pawn?|No, because the pawn can move two squares on its 1st move.
Therefore, the Square Concept must be visualized as if the pawn is on h6
instead of h7. The king cannot enter this square.|Of course, there are
many other exceptions to the Square Concept rule caused whenever other pieces
blockade the path of either the pawn or king. Still, the Square Concept is a
useful tool for performing a first-order assessment of promotion potential. } 1. Kb3 h5 { The pawn leaps ahead creating a square that white's king cannot
enter. } 2. Kc3 h4 3. Kd2 h3 4. Ke2 h2 5. Kf2 { My kingdom for a tempo (extra
move)! } 5... h1=Q { The pawn promotes and black wins. } *