Tower of London

Match the bottom arrangement to the top (goal). Three pegs hold different numbers of balls: Peg 1 fits 3, Peg 2 fits 2, Peg 3 fits 1. Only the top ball on a peg may move. Drag a ball to another peg, or tap a top ball then tap a peg to move there.

Tower of London is a structured planning task: minimum moves to reach a goal while respecting peg capacity rules. Extra moves and long thinking times can flag planning inefficiency for that day’s session.

FAQ

What does Tower of London measure?: Planning and executive problem solving — sequencing moves toward a goal within constraints.
Is this a medical test?: This is a self-assessment game, not a medical diagnosis. Talk to a clinician if you have clinical concerns.

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Goal state

Your move

Moves: 0Optimal: —Time: 0.0s

Solved

—Your moves

—Minimum possible

—Moves over optimal

—Total time

Lower move count (closer to minimum) and faster completion indicate stronger planning.

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