I hate puzzles like this; who cares what move you play, white still wins with such an overwhelming material advantage.  Just about any move you make leads to mate.

OK... Just how are you supposed to get 4 pawns in a file in a game? good puzzle otherwise.

hard

why not b-f2 ch, etc etc? hmm as noted, lots of possibilities

there was many other moves to checkmate

Some advice: I think a well-constructed chess problem's solution should be the one which works in fewest moves, or if there are multiple such solutions, either they are all valid or the most elegant is the "correct" one.

In this case there is a better solution:

1. Bxh2+ g1=Q

2. Rxg1+ Nxg1

3. Qxg1++

Also, it is not clear why all the extra pawns, white's light squared bishop, etc. In a composed problem I suppose you can throw extra pieces in to mislead. But if you are trying to illustrate a point, it just muddies things up.

EDIT: I thought the white pawn was moving downward for some reason.  Please disregard the proposed solution.

-progmtl.

very Puzzling Puzzle :)