"and black resigned" why did u say black resigned?

Because in Czech Republic they like doing things the other way around.

Fixed that for you.

If Knight to D5, then Qe2#.

...

too many "!!"'s

Like you said, the threat is that black "has no way to prevent himself from the threat". He couldn't prevent himself from the move he was planning on playing so he resigned.

I am really sorry my friends! White resigned, of course. And white was me...

However, your all comments were quite humorous. Thank you all!