Cresset

Cresset is a logic puzzle in the "one per region" family, rethemed around signal fires. Place fires so that every row, every column and every colour region holds exactly one — and no two fires touch, not even diagonally.

Every board has exactly one solution and can be solved by pure deduction. When you solve it, night falls across the board and your fires ignite — the only lights in the dark.

Modes

- Puzzle — a fresh generated 10×10 board, every time.

- Daily — one identical board worldwide per day. Compare hints, time and moves.

- Endless — an infinite strip of interlocking boards. One wrong fire ends the run; no assists. How many days do you survive?

Features

- No guessing, ever — every board is provably solvable by logic

- Colourblind-friendly: every region carries a symbol, not just a colour

- Drag to mark, undo always available, no time pressure

- Plays in your browser — no account, no ads, no tracking. Progress stays on your device.