My opponent insatiable appetite for pawn grabbing eventually lead to his Waterloo.

28...White's first pawn grab with 28.Qxe5, may look dangerous, but I think it's ok. No real mistake. White has easy play and equality with the move you give later:

29.Qc3 Rd3 - wins back the pawn, but no more than that. No attack or backrank issues. Just equality.

 

White collapses immediately with the two consecutive mistakes -

29.Qc7? turning the position into a very bad and probably lost one, and

30.Qxc6, which falls for the immediate mating threats (White is probably already lost by then, but at least 30.Kh1(maintaining eye contact for his queen with g3 in case of Qd1) would have forced you to fight much longer for the win.

 

I think you let him off the hook into an equal position too easily earlier on:

23...Qxd8! should be much better than 23...Rxd8. Reason is: now he can't even play 24.bxc5 because after 24...Bxc5 your b8 rook is still there, attacking the knight (in the game it was impossible because of his queen taking on c5. Now it would just be an exchange).

You jus keep an extra pawn and his advanced knight has to retreat or be exchanged. His pawn structure is still problematic as well, looks a lot better than the position that was received in the game, that kept it all equal.

 

Good game

thanks grolich for your comments