mate in six


ohh there's more for checkmate like after (Nc6-Re8-Nxb8-Bxb8-Qg8-Rxg8 )
moving the Rook forward to Rxh7 then Kxh7 next move the Rook to H2 (Rh2#) checkmate.
Why black must move 4. ... h5 ? Black king can saved with the following moves:
The conclusion is: Black is not checkmated by white
well this puzzle had made only for one thing is ( don't care about how many Pawns the queen worth only think about the best move you can do .
by this move I was trying to do such as a move it's called ( somther motherd ) or something like that I don't know what's it called ,but someday I'll put it with Explainings .