does playing games like Chess that require mental energy increase the need for more calories from carbs?
Not sure about board games, but I know for almost a fact video games requires extra calories. If I play a video game all day long it really seems to wear me down mentally.
I have a feeling though that board games are likely safer, they aren't as hyper mentally stimulating as video games. If anything, board games are probably healthy for your brain while excessive video games just makes you dumb and brain foggy.