Basically, you'll pay more attention to what you're doing. Perhaps more interesting would be STUDYING chess while on adderall. Your games will be a bit better on the drug, but that doesn't mean your comprehension of the game will be better. However, as said, it might prove interesting to study while using adderall as an aid.
Just my 2 cents. All I ever did on the juice was work or play music. Never mixed it with chess, and I'll never use any of it again.
I've unfortunately been on disability (one of the reasons I've started to learn this game) but am yet to play on adderall.
Wondering how it's been for others who have.