Really nice puzzle.

Wake up

move first the queen  , find with move Bishop

What if 

2.Bxd7+, Kxd7 ?

F  I  R  S  T

 Silly comments are for the first page only. Thank You !

@PapaLoup 3. Qb5+ Ke6 4. Nf4+ Kf6 5. Ne4++

nice one

1st

Easy

Good one, got it quick though.

Nice one

Nice!

I see checkmate in 4.... it only involves sacrificing the queen for checkmate

nice one!

Nice to see all the people whining about 2. ...Kxd7, unable to work out the alternative mate for themselves and too bone idle to actually read the thread for the perfectly good explanation. I like the Knight mates in the alternative line.  (worked them out for myself once I saw the first solution. It's not that hard.)

FIRST nailed the puzzle in less than 15 min 

Yes indeed...

I did not find it at once, it seemed to me that the king could delay its fate but both solutions are mate in 5.

Maybe the proposed solutions should contain these variants?

Thank you, dntoupin

Very good one, thanx for sharing...

very easy this one.. :)