Light Up

Game Rules: Place light bulbs in the grid so as to light up all the blank squares. A light illuminates its own square and all the squares in the same row or column unless blocked by walls (black squares). Lights may not illuminate each other. Each numbered square must be orthogonally adjacent to exactly the given number of lights. Click on a square to place or remove a light.

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Game Controls

Game Information

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Shortcuts: Ctrl+S(Save) | Ctrl+O(Load)

Game Rules: Light Up

Play Akari (Light Up) online for free. Place bulbs to illuminate the whole grid without lighting another bulb.

Also known as: Akari

Why play this puzzle

Light Up focuses on placing lamps so every corridor is lit without conflicts, often searched as Akari. It works well as a quick logic exercise, but also has enough depth for longer solving sessions with fresh generated boards.

The best way to solve this Logic Reasoning puzzle is to lean on step-by-step deduction: confirm forced moves first, reduce the remaining possibilities, and let the full solution emerge step by step.

Place light bulbs in the grid so as to light up all the blank squares. A light illuminates its own square and all the squares in the same row or column unless blocked by walls (black squares). Lights may not illuminate each other. Each numbered square must be orthogonally adjacent to exactly the given number of lights. Click on a square to place or remove a light.