When the Knight Trick Fails
White to play and win
PlayThe mirror of the drawing case: here the rook freezes the pawn and the king walks in, and this time the underpromotion swindle does not save the defender.
No signup needed. The opponent never gives up, and every mistake gets explained.
When the Knight Trick Fails
Win against perfect defense
Waking the engine…
The theory
The companion to the drawn knight-pawn position shows the other verdict: the same material wins when the geometry favors the rook.
The method. Place the rook so it guards the promotion square. The pawn cannot move, and the defending king is left with nothing to do but wait.
The king march. Once the pawn is frozen, your king approaches and wins it, because a single defender cannot cover both the pawn and your entry squares.
In this drill the defender may try the knight underpromotion, but with no fork or check that hits your pieces, the swindle is empty and the win stands.