Kevin McPartland wrote on Fri, Apr 30, 2004 11:11 AM EDT:
Technically, if you are left with two bishops on the same color, you do
not
win. The game is a tie. To win, one must either occupy both goal boxes,
or be able to occupy both boxes when your opponent runs out of pieces.
But as Larry pointed out, the chances of this occuring are exceptionally
remote. I doubt that it has ever happened in all the time that Goal Box
Chess has ever been played!