WOW!!!!

Nice combo.  I would flip the board though if you are doing black to move.  For some reason I do not see blacks move as fast from whites POV.

ok then, i flipped it.

I should submit this to TT. I like the style of this one: classic but hard-to-spot mating net.

I agree...and it is the only forced mate there so it is definitely TT material.  Nice stuff indeed....and thank you for the flip.

Keeping in view that white is ready to ckeckmate with Queen, Knight and Rook in D file, the first thing that came to my mind was that sollution to this puzzle must be perpitual check. Then it was an easy exercise to solve it. This is a good example of positional advantage over material.

I might solve this in TT, but in a real game it's unlikely that I would see this.

Not necessarily.  The purpose of TT is to improve your tactical vision.  I bet next time there is something close to this you will give it an extra look to see if it works. :p