Zugzwang

Black is busted, as only pawns can move.

White to move

One winning idea would be to march the king to b7 or d6. Black can do nothing to prevent this. Even pushing the majority is rooted in illusion.

For instance, 38.Kf2 g5 39.Ke3 f5 40.Kd3 f4 41.Kc4 g4 42.Kc5 f3 43.gxf3 gxf3 44.Kd6

Black to move

44...f2 45.Rb1 Nb5+ 46.Ke5

Black can capture the passed a-pawn, giving up the knight. White's extra piece would still prevail.

Inexplicably, White played 38.Ne7?? After 38...Ke7 39.Rxe8+ Kxe8, Black was in complete control.