Annotated chess game

Wrong pawn capture, that offers Black some counter-play. Instead, keeping the Black e-pawn blocked by 21.cxd5 was safe and good.

Although the attack suggested by answer_is_here soon peters out with best play, it might have put the frighteners on enough for White to slip into a draw or even a loss.

The game move leaves the rook stranded. 22...Rfb8 was probably the only worthwhile try.

Best: exploiting White's pressure down the h-file, to threaten to win Queen or King. Black can not hold both. @ jkarp the reason why the Queen recapture is better in this instance, is that in order not to incur worse, Black will be forced to give up the major exchange, Queen for Rook, by ...Qxh1, say, or else leaving it on the h-file somewhere. Moving the Queen off the h-file leads to instant karma: 25.Qxh7#.

Before anything else, I believe both players should review their short-range game: consciously look for one-move and two-move threats and possible captures. This cuts both ways: threats you can mount and captures you can make; but also those your opponent can mount and make. It will become second nature, but to begin with, it has to be a conscious effort, and you have to be disciplined about this. Think of it as holding a mental shotgun to your head: examine the position piece by piece, pawn by pawn if that's what it takes, and make sure you have left nothing loose to be taken in one or two moves; nor that your opponent hasn't left anything hanging that can be picked up free, gratis and for nothing. Eliminate, say, 90% of these short range oversights, and watch at least 4-500 rating points add themselves to your rating.