22.Bf1

Protecting the Bishop doesn't work, so White moves it out of danger. The move 22.Bf1 also protects White's sensitive g-Pawn whose role is to provide shelter to the King.

One of White's problems is the weakness of the dark squares on the Kingside. The light squared Bishop can't guard any of the dark squares, while the two Pawns also protect only light colored squares.

Next move: 22...Re2