Lightdoku: Logic Light Puzzle

Lightdoku is a logic puzzle built around a single, satisfying idea: light.
Every grid hides exactly one solution. Place your beams so each row, column, and region holds the light it needs — no guessing, no luck, just pure deduction. If you love Sudoku, nonograms, or Queens-style logic puzzles, this is your next daily habit.
A new puzzle every day

A fresh challenge lands each day. Build your streak, sharpen your mind, and come back tomorrow for the next one.
Logic you can trust

Every puzzle is verified to have one unique solution. You'll never need to guess — every move follows from the last. Get stuck? The logic is always there to be found.
Easy to learn, hard to put down

Tap to place a beam, tap again to clear it. The rules take ten seconds to learn. Mastering them is the fun part.
Made for calm focus

Clean visuals, no clutter, no pressure. Play one quick puzzle on a break or sink into a long session. Lightdoku stays out of the way and lets you think.
Features

A new daily logic puzzle, every day
Hundreds of procedurally generated grids
Guaranteed single solution — no trial and error
Simple one-tap controls
Play offline, anywhere
Track your solving streak

Light the grid. Solve the logic. One beam at a time