White To Play And Win

TODAY is the double-round day in the 10-round Benidorm U2000. This morning in round six I faced a Peruvian.

White to make his 32nd move in Spanton (1934) - Jesus Daniel Rodriguez Abanto (1762)

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32.a4?
I rejected the winning 32.Bxd5+ (stronger than 32.Rb7) cxd5 33.c6 because I missed that, after 33...Bc8, White wins with 34.c7 etc. After the text, White is no longer winning.
32...Be6 33.Rb7+ Kf6 34.Bd2??
Lots of moves draw, eg 34.Bxd5 Bxd5 35.Rxh7, but I thought I was still well on top and so was looking for a non-existent win.
34..Nb4
Now White is lost.
35.Bxb4
Or 35.Bxe6 Kxe6 (35...Nd3+ also wins) 36.Ke2 (36.Rxh7 Nd3+) Kd5.
35...axb4 36.Rxb4 Bxb3 37.Rxb3 Ke5!
Better than 37...Rxa4 38.Rb6, when White has drawing chances.
38.Ra3 Ra5 (0-1, 52 moves)