Ironically, while you're probably correct in programming design, I'm a national master in chess(which requires reasoning and logic), and I know about a handful of chess masters(FM/IM/GM's) that actually smoke dope. Allegedly, it helps to mentally slow the game down and reason each move out into their potential move branches. In the time allowed, they're able to visualize moves several iterations on down and concentrate better on mentally traversing them to figure out their best move.