A dominant pawnstructure leads to a beautiful checkmate

I would call it cute (not beautiful).

And--as The Gadget has indicated--there is a shorter one: 26 Qc6+ Rd7 27 Qc8+ Rd8 28 Nc7#.

black did not know how to play alapin's sicilian, i do not remember 4. .. d6 in my games here (try to search :)). the game is rather interesting nevertheless.