Mating patterns: Blackburne's Mate

I have a nice video series on chess patterns on Chessvideos.tv called "Pattern Recognition". All in all I have made 5 videos in this ongoing series.

If you have seen video #1 you should have no problems solving this puzzle: (black to move)



Solution appears at the end of this post.

The pattern occurs more often in this form:



This is from Stefansson - Bruzon.  Stefansson finished the job with 22.Qxh5!
Black loses on the spot as he just lost a piece, mate is threatened on h7 and he can't take the queen because 22....gxh5 is met with 23.Bxh7#

In our puzzle position black wins with 1...Qxf3! 2.gxf3 Bxf3+ 3.Kg1 Ng4 and mate with Bh2 next cannot be avoided. Sort of going the backdoor into our mating pattern!

To learn more about this pattern and some others you can watch my video on Cv.tv:

http://www.chessvideos.tv/forum/viewtopic.php?f=24&t=2484