Blanket is all done. 100 granny squares (3 rows dc with 4th row hdc), joined with a zipper join, and a sc plus dc border. Final measurements are 42 x 42 inches. I'm not sure but I want to say it took me two months since I was working on this during the July Sumo Basho.
I thought this was a chess puzzle at first. Checkmate!
Nice work though!