Light Up Puzzle

Lamplight is an Akari / Light Up logic puzzle on the Keep the Light night shell. Hang lanterns so every stone in the courtyard is lit. A lantern lights its row and column until a plinth or hedge blocks it; lanterns must never light each other; a numbered plinth says how many lanterns touch it. Forty handmade courtyards from 5×5 to 10×10, each proven to have exactly one solution, plus a seeded Daily.

1. Tap or click a stone to hang or remove a lantern.
2. Light every stone; lanterns must not shine on each other.
3. Match numbered plinths to the count of touching lanterns.
4. Use Hint, Undo and Reset when you need them; clear to unlock the next courtyard.

Click a cell to toggle a lantern. Keyboard shortcuts for hint, undo, reset and stage select are on screen. Tap cells to hang lanterns. Portrait layout supported.

40 courtyards + Daily Courtyard · Hub version 1.0.6+clarity.2

Start from numbered plinths with only one legal neighbour set.

A lantern that would light another lantern is always illegal — the game shows the conflict in red.

Empty corners often force a lantern or an empty mark.

Play today’s Daily Courtyard for one seeded puzzle shared by everyone.

Game progress belongs to this browser and this address. Use the game’s own save tools where available. Changing addresses or clearing browser data does not transfer your save.