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Flexibility

Hidden Rule

Logical reasoning

Pick the card that follows the hidden rule.

Starting level. Saved on this device.

  1. Try 2 practice puzzles. Nothing is timed, and the board helps you along.
  2. Then solve as many puzzles as you can in 120 seconds. They get harder as you solve them.

Tab to a card, use the left and right arrows to move, and press Enter or Space to pick. The keys 1 to 3 pick too.

How to play

Hidden Rule practices working out a rule from examples. Each row has three cards, and exactly one follows the hidden rule. The first row shows you the answer. Pick a card in each new row. You see right away if it follows the rule, and which card did. Pick three right in a row to solve the puzzle. Use the arrow keys to move between cards and Enter or Space to pick, or tap a card.