Match liquid volume between different vessels. Play Equal Pour online: ten free rounds from simple glasses to connected chambers with a shared water level.
Look at the reference vessel, then adjust the fill level in the other vessel to match its total liquid volume. After answering, compare your surface with the dashed equal-volume surface.
Simple glasses introduce the idea. Connected chambers then share one water level, and later rounds combine more chambers and changing widths.
The same surface height can hide very different volumes. Include every chamber and the wide parts below the surface.
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.