An excellent decision. By swapping the active enemy queen White avoids an attack and transposes to a superior endgame.

Despite the opposite-coloured bishops, White has a significant advantage since his bishop is much stronger.

With the strong threat of 9 Ka4, winning the b4-pawn. White later won.

Avoiding pieces exchanges in order to keep the enemy position cramped.

Creating some additional pressure before going f2-f4.

A strong blow that exploits the lack of coordination in Black's camp.

Parrying the threat of 7 Bxg6, but White's greater piece activity proves decisive anyway.

Black resigned.

Eliminating the more active of White's bishops.