Rook's Pawn

There are two drawing methods. The first method is for the defending king to stay in the corner.

The second drawing method is to box in the attacking king.

The key squares for a rook's pawn are the last two squares on the knight's file. If the attacking king can occupy one of those squares he will promote.

Perhaps it is more important to know the key defensive squares for a rook's pawn. They are the last two squares on the bishop's file.

There is one trivial exception to the rule for defensive key squares, but if you use retro-analysis you can see that it is unlikely that this position will ever occur.