Yet Another Endgame Problem
that has to be the most stupid thing i've ever seen, could someone please explain to me what i just saw?
Check the "Move List" for explanations of the underpromotions.
Spoiler:
There are several stalemate tricks possible. In general, if g5 and the h-file are covered, black will draw with underpromotion to knight on f1.
And in the end most computers will not understand that white has to keep the rook imprisoned to prevent sacrifice against g-pawn with drawn "wrong bishop" ending. And finally watch out for opposition when going into the pawn ending.
OH, i think i get it! through this analasis it seems that if he had promoted it differently the outcome was more or less likely a draw?
why doesn't black take the rook on g1 with check after e7?
Because it loses without any chance after destroying the mating threats on h-file and the possibility of a stalemate trap.
I think there's a slight mistake in your problem. The first promotion should have been a queen, otherwise 4...Rh7+ makes no sense, since 5. Rxh7 isn't stalemate.