I believe I had the path your rook took defended (from row 11 to 15 anyway) at some point (maybe I never really did, but only thought so because I was overlooking something), and I think that changed when I moved some pieces without me really thinking about it. I didn't really look at it too closely after that, and figured it was well enough protected by my gold and silver generals, though I never really checked for sure. So it was just carelessness on my part.

I'll still follow the game, but one of you hurry up and finish off the other so I can play again. ;)