Split a shape into two equal areas by eye. Play ten free rounds of Half & Half, from simple geometry to branching shapes, and test your visual intuition.
Drag the divider until the two colored regions look equal in area. You can also use the slider and arrow keys. Lock your split to see the actual proportions and the correct dividing position.
Ten randomized shapes move from familiar outlines to curves and branching figures. Their proportions change in a fresh set, so remembering a divider position will not solve the next attempt.
Equal width does not always mean equal area. Look for regions on opposite sides that could balance one another.
Ten rounds add up to an Instinct Score of 0–1000. Round limits rise from 40 to 220 points. Instinct’s Core separately measures how accurately you predicted your rank; it waits for at least 30 other comparable attempts. These games are informal benchmarks, not a diagnostic assessment.