Thanks to the fact that the black rooks are stalemated on the kingside, White has possibilities to open the game, without refraining from possible sacrifices:

31...Nxb4 32.Rb3+–.

White chooses a prosaic way to realise his advantage. More energetic, stronger and simpler was 36.Rxd5 Re8 37.Rxf5+–.

More tenacious was 37...Rd8, after which the most precise way to win is 38.Rd3 Qc7 39.Rc3! Nc6 40.Qf2 f4 41.Nd3! d4 42.Nxf4!+–.

Black resigned.

The combination of the moves b2-b3 and Bc1-d2 is unfortunate, so if Black is able quietly to complete his development, he will get a good game. However, his bishop hangs on the c-file:

In an open position, White secures the advantage of the two bishops, thanks to which he has a clear advantage.

Retreating the Na5 would lose the initiative, as the Ra1 hangs. But there followed instead:

Black’s queenside is ruined and White wins.