White gets the two bishops, but the pawn structure after 22...f5!? 23.Kh1? d4! was made for knights. How could White have made the position more bishop-friendly?
There's a lot of tacking between moves 22 and 36: note that Black has already doubled on the g-file by move 29, but waits until move 36 to break. It's all about control: Eric doesn't create the crisis until all the positional details are in his favor.