Bishop outplays the Queen

This is final part of S.Kaminer study

1.Bd8!
Better than 1.Be1 because Black King can escape via g5 square

1...g5 (only move) 2.Ba5
And now Bishop goes back. White lost one tempo to force g5 square blockade. Now the threat is Be1. Queen has to guard 2nd rank (preventing g3) and also e1 square. Note that g4 is impossible because of Bd8 mate


2...Qe2 3.Bc7 (idea is Bg3) Qf2 4.Bd6!
Black is in zugzwang. Queen is not able to control g3 square and tie g2 pawn at the same time. But...

4...Qf4!
Last try! Now 5.Bf4 gf4 gives only a draw. Fortunetly, White can use X-Rays motif

5.g3 Qg3 6.Bg3 mate

Neat eh? :-)