Well they could move Knight to B1. Then they would be able to compensate for the lost piece.
Hmmm.....

Yeah, I saw Nb1 too-- protects material for that turn, at least, but leaves a pretty bad position. Opponent probably wanted to get the a1 Rook out, and now it's boxed again, which leaves no chance of sliding the King over there for some protection. I don't know if I would have resigned right at that point, but if I walked up to that board and was given a choice of which seat to take, I'd grab Black.
--Cystem
Not sure why my opponent resigned. It was still early in the game. Anybody got any ideas?