Rook vs Pawn: Trapping the Knight in the Corner

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

This is the companion to the drawn knight-pawn position, and the whole difference is one file.

The rook stays put. Your rook on h2 already covers the second rank and never moves in the solution. Only Kc4 wins; every rook move lets the draw back in.

March the king. Kc4 and then Kb3 attacks the pawn and pens the black king on b1. Black's only try is a1=N+, which does come with check.

The corner traps the knight. A knight on a1 has exactly two squares, b3 and c2, and Kc3 takes both. It is frozen and you win it. On b1 the knight also has a3, and that single extra square is worth half a point.

Make it a method. Against a rook pawn, driving the defending king down from behind is the standard winning plan: rook checks drive him down rank by rank, the king follows, and the last defensive trick promotes into a dead corner. A full queen does no better: promoting runs straight into Rh1 mate. Remember the asymmetry. The same rear push against any other pawn achieves nothing, because the knight is born one file from safety.