==

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.

?! 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.

? 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.

?! == 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.

?? This is the losing move. Black was doing fine, but he kind of panicked. Rook moves and or a king move would have kept equality.