This is the first new move, though it's obvious enough to have been played at least a few times. It doesn't do anything though. Black is going to have play along the c-file. The queen can't stay.
== There's no rush to play this. You can skip it and go directly to 11...c5.
12. Bg5h4 c5 13. Ra1c1
?! It's at this point that black stands better. Black's plan was pretty good as it unfolded in the game, but there was an important motif he missed. After black messes up white's structure, it's very important to force white to choose between giving up the DS bishop or having to surrender control of c1. See black's 15th, a howler.
! Black certainly can play this way.
14. gxf3 cxd4 15. exd4 Qd8a5
? A howler, but black is still a bit better. The plan here was a pawn-push and a push to the h-file. Thus white's a3.
16. a3 Rf8c8 17. Qc2e2 Nd7b6
?! == Black has no plan. There's a decent forcing variation where you can take on a3. It's an exchange sac that's fine for black.