White to Move
This is a removal of the guard of the square which removes the guard who prevents the mate. Blacks choice is to lose the queen or the game.
Source: How to beat your dad at Chess
finished 6th circle of this book
now on 79 of Ct-art
finished L10 1-110 circle 1
tuesday morn did another L10 1-100 circle 2 scored 99% on to L20
I enjoyed j'adoube (see sidebar link) video on his blog annotating a game from the Art of Attack.
Also Heisman tactic book is coming out in Summer.