Lightdoku: Light Puzzle

Light up the coast, one beacon at a time. Every board is solvable by pure logic no guessing, ever. A fresh daily puzzle, 200 levels, and calm coastal vibes await.

Lightdoku is a warm, unhurried logic puzzle about light.

Place one lighthouse in every row, every column, and every colored region — but no two beacons may stand side by side, not even diagonally. That's the entire rule. Everything that follows is the puzzle.

Every board is guaranteed solvable by pure deduction. No guessing, no luck, no dead ends — if you're stuck, there's always a next logical step waiting to be found.

FEATURES • Daily Puzzle — a fresh, hand-tuned challenge every single day • 200-Level Campaign — a gentle climb from tiny 4×4 grids to expert 8×8 boards • Practice Mode — choose your size and difficulty, play as much as you like • No-Guess Guarantee — every puzzle is solvable by logic alone • Cozy by Design — soft cream-and-amber visuals and gently glowing lighthouses • Play Anywhere — fully offline, no account required • Track Your Best — solve times saved for every puzzle

Whether you've got two minutes or twenty, Lightdoku is a quiet place to think. Light the coast, one beacon at a time.