The brilliant chess move (65)

what is the solution?
Moves & Lines: http://glareanverlag.wordpress.com/2010/05/01/der-brillante-schachzug-65_glarean-magazin/#more-12695

@dordle What is the answer?

It looks like with best play by Black that this is a Mate in 22:
This was actually from a study by Martin Van Essen, and for a long time it stumped computers.
Here is a link on yacdb.org to this study, and thanks Walter, that was quite difficult.
.
There's a new "Brilliant" in 'Glarean Magazin'.
The Brilliant Chess Move #65 (Van Essen 2005):
http://glareanverlag.wordpress.com/2010/05/01/der-brillante-schachzug-65_glarean-magazin/
Regards: Walter
Mate in 22
Solution