Lucena's position cont'd

There is an exception to the lucena's position, which is the pawn is at the flank.

White to play

The white king cannot come out. The only plan is to move the white rook to g8, but after 1.Ra2 this plan is easily stopped by Kf7. This position is a draw. However, there is an exception to this position.


White to move

This is a win for white. The black king is at c7, and gives ample time for the white rook to move to the g8 square.

1.Ra2 Kd7 2.Ra8 Ke7 3.Rg8 1-0