Here it is - fixed "Great puzzle"!!! Now it's mate in 4 instead of mate in 3. Hopefully there are no extra solutions now. Thanks to diomed1 and  tonydal for finding extras in first "Great puzzle". I'm waiting for your comments on this puzzle!
Don't forget to look at "Move list" because it has a lot of other variations.

Hey Kingskiller. Sorry, but I think it is a rather poor puzzle. There are many solutions.

 

Here are two, there might be more:

 

1.Qd8 Kc6  2.Kd4 Kb7  3.Qc7+ Ka8  4.Be4#

 

1.Qa4 Ke6 (other moves are quicker deaths)  2.Qe8+ Kd5  3.Qd7 Kxc5 (3...Kxe5  4.Qf5#)  4.Qb5#

Fixed edition needs more fixing

 

Thanks TonightOnly, I didn't see those solutions... I'll have to think about it, and may be just forget it

 

P.S. It's called "Great Puzzle" to make people look at it, otherwise nobody does!!! It's poor one, I agree.

Also, in the future, check the option that puts the board coordinates on the diagram. Otherwise, how do we know if white is going up or down?

     1 d7 King any of the 4 possible moves 2 d8 (promote to queen) with mate in 2 more moves at the most. Great puzzle, though, very tough

     I didn't catch the Qa4, tonightonly, good one

    don't give up kingskiller these are fun and instructive even if imperfect. I'm trying to make a few of my own and I know how tough it is