Power of Exchanges in Chess – Transitioning into Bishop endgame

Jiganchine – North, Keres Memorial 2014
White to move. Find the winning idea.

The title of the post obviously contains the hint, but I would still suggest you consider what is the biggest weaknesses in Black’s position, what piece defends that weakness, and what is the best piece to attack it attack it. Alas in the game, I overlooked it, and gave Black a chance to defend, which he in his turn – also missed.