Queen vs Rook Pawn: The Stalemate Defense

Watch the method: press play to see the winning idea run, or step through it move by move.

The queen-versus-pawn winning method has two famous holes, and the rook pawn is the biggest one. Knowing this defense turns dead-lost positions into half points, and stops you from trading into 'won' queen endings that aren't.

Why the method fails here. Against other pawns, the queen forces the defending king in front of its pawn and gains a tempo for her king. Against a rook pawn, 'in front of the pawn' IS the corner: with the king on a1 and the pawn on a2, the defender has no legal king move, so one careless queen move and it's stalemate. The attacker gets no free tempo, so his king can never approach.

The defender's job is minimal but exact: keep your king on the corner side of the pawn, b1 and b2 are home, a1 is the corner you step into when a check drives you there and that move is legal, and never voluntarily abandon the pawn. In this drill's starting position you are already in check, and Kb1 is the only move that holds. Stepping up the board to a3 or b3 looks like it hugs the pawn, but the queen then wins it with checks. Distance-checks change nothing; only an attacking king already close by wins, and this drill starts with it far away.

Bonus knowledge: the bishop pawn draws too (c- or f-pawn, via a different stalemate trick). Center and knight pawns lose. That four-way distinction decides real games every day.