Original sentence: This is purportedly increased by the game's usage of both sides of the brain, in contrast to other games (such as Chess), which are primarily "right or left brain" games.This multi-dimensional play is supposedly the result of the combining of pure numerical calculation and an intuitive spacial awareness
Edited sentence: This seems to be because go uses both sides of the brain while chess only uses one.To play go one needs spatial awareness and aesthetics and as well a pure calculating ability