I think this works just as well if the pawn is promoted first, and the black Queen drawn away second. e8 is currently showing as a wrong move.

After Rh2, why not Qxh2 instead of blocking?

iamme2 has black's best move after the Rook checks, since the King would be free to take the Knight if Qxg8, and then he is not easily contained again. If black Queen moves in response to the Rook check, however, then it is not guaranteed checkmate. It would be if black's only choices were to block on h4 or capture on h2, but the Queen can also prolong the game by blocking on h3 and checking the white King; this prevents the quick mate at g8, but leaves black worse off then simply moving the King to begin with.

these are stupit if there is why to aviod it from the other play