Exactly - slyness and ruthlessness bordering on sociapathy / psychopathy should not be interpreted as intellect or genius.

Many (most?) very good chess players are also very good at mathematics and understand the laws of probability (once you are one pawn ahead in a game, all things being equal you can win by attrition and taking piece for piece - a mate of mine with a Phd used to beat me this way!).

Based on the evidence of his speeches, I am not convinced that Mr Zuma has a good grasp of mathematics.