Cutting Off a Knight-Pawn
White to play and win
PlayShift the pawn one file inward and the stalemate tricks vanish: with a knight-pawn there is no drawing corner, so the rook cuts the king off and wins cleanly.
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Cutting Off a Knight-Pawn
Win against perfect defense
Waking the engine…
The theory
The difference between a rook-pawn and every other pawn is enormous in rook endings, because only the rook-pawn owns the stalemate corner.
The method. Cut the defending king off from its pawn with the rook, then march your own king up. With the escort gone, the pawn is helpless.
Why it is easy here. A b-pawn, or any non-rook-pawn, has no corner stalemate trick, so the attacker can approach without walking into a swindle.
In this drill the defender defends perfectly, but with no corner to run to, precise cutting and a king march bring the full point.