my first 'puzzle'

Hokay so heres a puzzle which came up in a game I played. It took a minute or two for us to see it. I dont know to be honest if theres any problems with this por ejemplo alternate moves but this is what we played when we saw that what came to mind first wasnt the best. Its mate in four for white. Comments as always welcome.

interesting puzzle. It is fascinating that the black queen helps black with the checkmate.When black would have played 3...Kh5 then he could escape by taking the knight with the king.

3... Ke8 would avoid mate for another 10 moves or so. 

Yes you're right offcourse but it is interesting to look for escape doors. After taking the knight it is time to hit the resign button.

this is one of those white to play and win, because Ke8 does avoid the mate, but white will be able to take off blacks queen and thus win; the route to Kh6 fails to when Kg7 is met with Ne8+ fork winning the queen. The h7 capture looks like it should deliver but fails on all variations.