Running the Blockade

This is for those of you who like harder puzzles.   I found it elsewhere, posted the solution there, and brought it here. 

White to move and win.

I'll post the solution later today or tonight. 

I dont see it.

The only thing I can think is someting involving Rg2, but Black can never be forced to capture?

I dont think Qa2 achieves anything.... anything.

The trick is to get the King to f2 and the rook to e1 before attacking with the Q on a2.  If at any point black captures the rook as it maneuvers to e1, then the blockade is broken.   Otherwise the Q will break the blockade by being captured or capturing the pawn.

Sneakypete has the right idea, but it's more complicated than that.

This is a very clever puzzle, because White has just enough room for each piece to move in.  There is no wasted space here.

Here's the diagram.  The comments are contained within.