Two Queens Game

This is my latest win against Little ChessPartner with the level set to Hard as usual. Involving mate by two queens I'm fairly happy with this result, as I had made a few blunders earlier on and could easily have lost. 

The real saving grace was allowing a pawn to be captured at on a2 by the bishop which had pinned black's queen for some time on a5 due to threat of my rook on a1 if the bishop moved away.  Black's last move was queen b5.