puzzle #6

White to play and checkmate in 20.

That puzzle wasn't so hard

Did you solve this.

yeah I did

i knew this puzzle it is a good one 

If you know you saw it in chess talk 

this postion is IMPOSSIBLe

HHAHAHAA funny

no, there is a mate. but as a hint, I'll say that there is  a pattern you have to follow