Now, White can manoeuvre at his leisure. He increased his space advantage and obtained a clear advantage when Black lost patience and took on d5.

Black is clearly better: he has the attack with opposite-coloured bishops, with White’s king in the middle (not able to run away via g1). White’s bishop is almost a mere pawn, while Black’s is a superb Botvinnik bishop

If 31.b3 a4, also with tremendous pressure.

Perhaps you would not think so right away, but Black is winning!

Actually, Black was much better already, as the e-pawns is a clear (double)weakness.

32.Rdd1 is met by 32…Qa3, attacking both the most backward of the doubled pawns as well as the a2-pawn.

White’s bad bishop was a good defender.

Material is equal again, but the pawn structure still favours Black.