Positional game that may be useful for learning

I want to share a game I played as part of a team match here. It's one of my favorite positional wins, and I think it could be useful for people to look through, especially for more advanced players.

It shows the long-term power of the Gruenfeld defense from the black side. Early on, black makes a purely positional pawn sacrifice, and gradually grinds out not just compensation but an advantage, which he eventually converts deep in the endgame.

It's also interesting in how black seems to violate nearly every principle beginners are taught. He gives up material for (seemingly) unclear compensation, lets white have control of the center and the only open file, and exchanges the fianchetto bishop, leaving holes all around the king. After white's 23rd move, many people would probably say white is winning. But black's compensation is based on a strong blockade of white extra, passed pawn, pressure against the weak c3 pawn (which later gets doubled, negating white's extra pawn and giving black an outside pawn majority), and having the better bishop. These factors become more important than white's advantages.

Lastly, white finds some tricks to maximize resistance in the rook endgame near the end, and black has to be precise in order to win white's rook without allowed a drawn R vs p endgame. White's last move is a little weird (he may have thought 49...Rxg3 is stalemate), but after 40. Rg1 Rh2! black wins also.

Anyway, take a look. I hope this game will be interesting and even educational. Honestly, I don't think it will be useful for beginners (or those close to beginner level). It will be confusing and might introduce bad habits if trying to mimic black's play. First you have to learn the principles, and then you can learn when to violate them.

It took me some time to realise that the final position is not a stalemate.