26.Be3 bolsters White's defences around the king. White can afford to shed the odd b-pawn. I think the advance of the e-pawn ought to be held back for the nonce anyhow.

Another idea here is 28.Be5+ (instead of Bxc7) Kf8 29.Nd2 Re2 30.Rf1+ Ke7 31.Nf3 Bf6 32.Bxf6+ Kxf6 33.d5 Rxb2 34.Nd4+ Ke7 35.Rf7+ etc. If Black plays (cunningly) 28...Kg8 then 29.Nd2 (...Rg4+ 30.Kf1 or 29...Re2 30.Nf3 Bf2+ 31.Kf1 Rxb2 32.Ng5 threatens 33.e7. The plan White has chosen looks good enough, though.

excellent analysis, thank you

30.Ng3 is OK, but I would have preferred 30.Nd2 or Ne3, reserving exchanges for a better occasion. But after 30...g5? (...Bxg3!?) 31.Nf5+ Kg6 32.Nxh4+ gxh4 33.Rf1 is great for White. Supposing Black were to play 33...Ra6, White could actually afford to sac a piece: 34.Rf6+ Rxf6 35.Bxf6 Kxf6 36.d5 Ke5 37.c4 with a simple win: White's King rounds up the h-pawns then ambles over to shepherd his own pawns home.

Just push your passed pawns, it's not rocket science. This should be still an easy win for u.

Don't panic. (We really need a font selection on this site so it can be printed in large friendly letters...) Sometimes when you are material ahead but can't find a clear path, it's not a bad idea just to consolidate, centralise, and then look for a plan. At the moment, the Black K-side pawns aren't too much of a worry, as the WR is keeping the BK out of the action. But if they can mobilise they can become a real menace. On the other hand, the BR is really laming White's pawns. Maybe 38.Bf2 is indicated, anchoring the d-pawn and allowing the c-pawn to advance. If 32...Rd2 33.Kf1 Rxb2 34.c4

This move doesn't deserve the ?? as it transpires. Black just doesn't have enough, though he does his very best over the next few moves.

(!) A saving move, though 44.Ra3! was also playable. Black was threatening 44...g3. He could still try it, hoping for 45.d8=Q? g2+ 46.Kg1 Rxe1+ 47.Kh2 Rh1#, but White would never fall for that: 45.Rg6!

You seem to be doing all right so far...

Unfortunately Black has run out of resources. I suspect the position is a "zugzwang", it is hard even to find a sensible waiting move for Black, let alone anything positive.

But the a-pawn is protected by the bishop's X-ray ... protecting ... thing. 52.Rxg3 Rf5 53.Rf3+ and the rooks come off, or 52.Rxg3 Ra7 53.c4 etc