The rook will stay en prise so black has time to consolidate.

This is an attribute of master play: patience when the opponent is in a bind.

This finesse ensures that Black extracts as much material value as he can, and keeps his centre as well.

A great move by black really.

this "defending"in between move is another wise Lesson ! When you see a good move .... look for a better one! And yes, learning to be patient is the other difficult thing ! Take another look at the squares you control (more or less) in his territory ... and compare it with his area of control ! Take into account that he can move his pieces quite quickly into development while you're still busy to free yourself ....

That bad white DSB is hurting you much now. Maybe your other R could have helped a bit when you had developed more conventionally.

Unfortunately, 13.Kf1 won't do on account of 13...Bxh3 winning pawn and knight to add to his trophies. No other move was playable here, but, man, what a horrible square for the queen!

yes, i first thought Kf1 was possible,but archduke_piccolo is right !

I think black was threathening Bc4. If queen takes bishop, then Queen takes knight, queen has to go back to f1, then exchange queens and white loses castling rights (not that it would really matter, since queens are traded off) and black is a rook ahead and can finish the game easy. So d3 is actually not that bad.

@schakertje , had also seen Bc4 . This is a nice analysis of this possibility. But maybe he just wanted to free his R. Controlling two parallel diagonals with his B's isn't bad either for black !

yes .... finally .... although too late  

Generally speaking, a rook on the second and seventh rank leads to a decisive advantage...

There was not a swag of a lot of choice. The Bishop move, 'faute de mieux' was correct.

maybe b3 as an alternative .... but all ways now lead to the same outcome ....

Yes, but when is taking bad? When your opponent has a forcing move that wins.

Also playable was 16...Bxh3!?

Another advice from a video lesson: "do not release the tension in the middle without a good reason". The idea is that tension gives potentiality. Don't take that away for nothing ..., without knowing what you win (not per se a piece !). You need your pieces to win, so taking them off the board should give some compensation (advantage in points, space, control of important fields, or in a tactical or strategic way)

you need a good drink to go on here .... ! Cheers !  

Black is exploiting the immobilization of White's pieces to clear out the Q-side, after which he will exchange everything off on e2 and run the pawns home. White could have resigned here with a clear conscience that he has no play left.

@archduke_piccolo, the right words  

Another twist to the thumbscrew. Here I would simply have exchanged off on e2, brought the other rook across to c8 and shoved home one of the Q-side pawns: 22...Rxe2ch 23.Rxe2 Bxe2 24.Kxe2 Ke7 25.Kd2 Rc8, and nothing could have stopped the b-pawn's promotion.

I do not need to do that since I have a forced mate.

Very true, I think I won a game recently for the same reason. In this case here though, I don't think he did go easy on me, I was just thinking it at the time, but now I'm certain it wasn't true.