Cognitive Challenge

Find the rules governing a 3×3 grid of shapes and select the missing piece from 6 options.

Based on Raven's Progressive Matrices (1938–), a globally standard method for measuring fluid reasoning (Gf). Tests your ability to detect how shape, color, and size change according to rules.

As you progress, the number of rules to track simultaneously increases.

After the challenge, the full methodology and academic basis are disclosed.