20...Rbc8 21.Bg4! Qg6 22.Bh3 Rc7 23.Nd3

Nf4 is coming.

Now White targets a7, c7, and c5 at the same time!

Black stopped suffering. Great positional lecture by Viktor!

Nasty along the diagonal. The bishop on c2 was not that effective since after ...g6, Black is covering all the threats along the b1-h7 diagonal.

White is able to play d5 and again we see what devastating effect it has.

Enough for a decisive advantage even though it was not the best option.

And White wins material and the game.

Just 2 bishops and rook will mate the black king by force! There is no escape nor even the slightest chance, it is a forced mate in 13 moves!

The moves are all forced now.