help finding a composition

not long ago a composition was posted in here.. I tried to show it to people and saw that I don't remember it..
I searched 4 pages back both here and in the "More Puzzles" forum and found nothing

this is what I remember of the composition:

the position was something following this lines, but very different (I don't remember at all the position of the white bishop, and I'm not sure about the exact position of the other pieces.. or even if they were there):

the idea was that you sacrifice your queen to force the king to the corner where all of black's pieces are tied down to not let you move your king exept for the pawn on the a file.. which he is forced to move until he gets into zung zwang and mate to follow..

Pieces I remember were on the board (not sure about position): black knight, queen, king and 2 pawns. white: Bishop, Queen, king and a pawn

I'm not very good with discriptions but if someone can help me find it it will be nice..
Thanks

Try this:

http://www.chess.com/forum/view/more-puzzles/what-the

That's the one. It was posted by someone other than Gonnosuke quite recently.

yeah.. thanks!