Here the advantage of already having the king on c7 is obvious. Thus the king walk has yielded Black a slightly improved version of the endgame that was to come. Later Anand had a real winning chance before the game ended in a draw.

As you may know, the location of the king is crucial in positions with only major pieces. Having the initiative against a vulnerable king is a big advantage in such positions. No wonder here we see the occasional stroll to the opposite side. Here Black has the upper hand, but he still has to break through on the kingside. In order to do so, he first brings his own king to safety. This strongly resembles Petrosian-Unzicker, Hamburg 1 960, where the future World Champion, in a superior position, first brought his king from g1 to b1 before starting an offensive on the kingside.

Perhaps the more active 38.f4 was worth a try, while 38.a6 seems useful to include, to obtain some entry squares ( c6 at least) for the queen.

The queen threatens to enter the queenside, exposing the white king.

Finally, but also decisively!

And Black won.

Nihai Sarin vs Anish Giri, Chess.com speed championship 2022. White to move and win. Level material, but White has a forced winning line. See if you can calculate it.

1 Nd6+! Rxd6 2 Re7+ Kg8 3 Re8+ Kg7 4 R1e7+ Kh6 5 Rh8+ Kg5 6 h4 mate. Black can avoid mate by 1...Kg7, but 2 Nxf5+ gxf5 3 Re7+ Rxe7 4 Rxe7+ Kg8 5 Rxb7 is hopeless.

Creeping Queens
Sometimes, especially in closed positions, the queen just can't find a decent central position. She then has to sneak her way to an active placement.

Why this move? Is the bishop not just as effective on c8? In fact, it retreated there only three moves before in order to avoid being exchanged.