Rook vs Bishop With Rook Pawns: Winning by Zugzwang

This is the ending that overturns the obvious plan, and it is why zugzwang belongs in your rook versus bishop toolkit.

The refuted plan. Rubinstein drove the white king away from the corner and won the game. It was later shown that precise defence holds that way. Chasing the king out gives it room, and room is what the defender needs.

Maizelis's method, 1963: imprison, do not evict. Shut the white king in the corner on g2 and h3, box it with the rook, bring your king up, and then hand it the move. The bishop is tied to one diagonal, the king has no square, and every legal move loses material.

Zugzwang beats brute force. There is no mate and no breakthrough. The win is one tempo, given to an opponent who cannot use it.

It ties back to the safe corner. Notice where this ends. When White finally drops the h4 pawn, the white king is sitting in the safe corner, and it does not save him, because your own rook pawn has not crossed the middle line. That is exactly the territory where a rook pawn beats the safe corner. The boundary rule you learned as the defender is now working for you.

In this drill the defence is precise and the win is long. Shrink the box, do not open it.