Going from Wales to America, (just for a game of chess and an inspection to check and see if you really are a 65 kilo American, who has not got a gun and doesn't even have a television) is a bit extreme in my opinion. Maybe a two hour drive but a six hour plane journey...that is crazy for so many reasons:
1. bad for the environment
2. very expensive
3. It would be lot simpler to have a game through chess.com and send Beast a picture or something!
Carbohydrates have a tendency to be low GI when they are not processed.Unless your dumb enough to eat white breads and rices, most have a very low GI. Also, dietist is not a word. Dietician is a word. Seriously, according to your logic, humans must not have eaten bread before the 1980's, when obesity became a major problem.
Since the 1980s carbs have been highly processed and in combination with fear of fat and introduction of fat-free products. The fear of fat and the unnessary amount of carb consumption has made us fat, yes. Besides, there were also fat people before 1980s anyways.
Just don't eat white bread. All other grains are generally low GI and Grains remain at the bottom of the food pyramid.