I looked up “cleaning pots” under google and came up with the following suggestion, which I used. I made a paste of baking soda and water and spread it over the bottom. In an hour, I was able to pull most of it off with a paper towel. I washed it out and repeated the process. I just had to use a bit of elbow grease and it is now as new.
I made the mistake of turning up the heat too high. I should have just slow cooked the thing. I have hydrated the beans after an overnight soaking and never had a problem until this chili disaster.
Thanks to all who responded.