The average life span of an NFL player is about 55 years old, with dementia and mental illness being common. Some of this may be due to diet and steroids, etc., but much of it (the dementia and mental illness especially) is likely due largely to concussions, which are also common in boxing...
In short, I would suggest that boxing and chess are not such a great mix, maybe jujitsu and chess or similar would be a better match.
http://www.cbc.ca/sports/football/story/2008/11/19/fifthestate-headgames.html is a summary of a CBC documentary on the topic.
Edit: If you are implying by the term "shot glass set" that drinking would be advisable, it's a dangerous suggestion IMO. Actually I assume you were joking, but the subject (concussions and their after-effects) is deadly serious, especially in high-contact sports, in which boxing definitely fits the bill...
Simply suggesting upgrading the rules of this wonderful variant to playing with the shot glass set. It'd seem the original version lacks something vitally stupid. :)