Chess Calculation Training Vol2: Endgames-Edouard(Thinkers Publishing 2017)
Chapter 4: Unexpected Blows #17
White to Play
White has an extra pawn and an advanced queenside majority but his pieces are passive.
I think there is more than one way to win.
The alternative solution to the recommended line is not considered to be be winning but I think Edouard missed something.
Edouard considers only 52.Ba3 and considers this equal.
I think 52.Kc3 and 52.Bf8 are both winning