Set angles by eye, shape triangles and tackle a four-angle quadrilateral finale. Ten free rounds use whole-degree targets and match angles in any corner order.
Move the orange ray to the target angle. Shape triangles with one, two and then three movable corners. In the finale, move four corners to build a convex quadrilateral. Match each target set in any corner order.
Familiar angles come first, followed by rotated references. Round 7 has a fixed horizontal base, round 8 unlocks B and C, and round 9 unlocks all three corners. Round 10 adds a convex quadrilateral with four distinct angles.
Match the angles rather than the side lengths. Size, orientation and corner letters do not affect accuracy. The view stays still after a drag; use Enlarge, Zoom out or Fit shape when needed.
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.