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LOGIC · FREE TO PLAY

Lights Out

Toggle a tile and its neighbors until the whole board is dark.

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How to play Lights Out

  1. A filled circle represents a light that is on.
  2. Selecting a tile toggles it and its horizontal and vertical neighbors.
  3. Plan combinations of moves to make every tile show an empty circle.
  4. Every generated board starts from a solved board, so it is solvable.

A useful way to practice

Write down what is known and what is only assumed. Look for constraints that eliminate possibilities, then test a small next step. A wrong answer is useful information about the strategy you chose.

What your result means

This is a recreational logic activity. Results describe performance on this particular task, with this device and these rules. They are not a clinical assessment, IQ score or promise of improvements in daily life. Your best result and recent sessions stay in this browser; no account is required.

Is Lights Out free?

Yes. You can play the full activity without a payment, download or account.

Can I use a keyboard?

Use Tab to focus buttons and Enter or Space to activate them. Answer fields accept normal typing. The maze also supports arrow keys. Timed tests will differ between touch, mouse and keyboard input.

Why did my result change?

Practice, a different generated puzzle, distractions and input timing all affect results. Compare several sessions rather than drawing a conclusion from one attempt.

KEEP EXPLORING

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