The Bishop Guards the Promotion Square
White to play and draw
PlayA knight and a pawn on the seventh rank against a bishop looks winning, but the bishop guards the queening square from c7 and refuses to budge. With best play this is only a draw.
No signup needed. The opponent never gives up, and every mistake gets explained.
The Bishop Guards the Promotion Square
Hold the draw against perfect play
Waking the engine…
The theory
Knight and pawn against a bishop is often winning, but not when the bishop plants itself on the promotion square's diagonal with the defending king nearby.
The frozen pawn. With the pawn on the seventh and the bishop controlling the queening square, promotion is impossible until the bishop is evicted.
No lever. The knight cannot both attack the bishop and cover the queening square in time, and the defending king plugs every gap. The position is a fortress.
In this drill the target is a draw. Recognize the fortress, keep your pieces together, and do not throw away the half point.