Grid puzzles
Six daily logic puzzles — a new one of each at midnight UTC, free, no sign-up, and every board checked to have exactly one solution, so there is never anything to guess at. Each game has a rules page and an archive of every past day.
- Futoshiki5 × 5
A Latin square where the clues are signs between squares, not numbers in them.
- Binairo8 × 8
Two symbols, three rules, and an endgame that turns on no two lines being alike.
- Skyscrapers5 × 5
The same Latin square, seen from outside: each clue counts the buildings you could see.
- Nonogram10 × 10
Not a shuffle at all: paint the picture its own run lengths describe.
- Hitori8 × 8
Cross numbers out until none repeats — without splitting the board in two.
- Light Up9 × 9
Light every square, with no two bulbs in sight of each other.
What are logic grid puzzles?
A family of pencil puzzles solved on a square grid by deduction alone: each has a handful of rules, a set of clues, and one arrangement that satisfies them. Nonograms paint a picture from run-length clues, Futoshiki and Skyscrapers are Latin squares with extra constraints, Hitori and Binairo are about which cells to shade, and Light Up places bulbs so every cell is lit. Most come from Japanese puzzle publishing of the 1980s and 1990s; all of them are solved the same way, by finding the one cell a rule forces and letting each answer expose the next.
Are the puzzles free?
Yes. Every puzzle here is free and needs no account; progress is kept in your browser. Signing in adds a streak, a daily score and a place on the leaderboard.
When do new puzzles come out?
At midnight UTC, every day, one of each game. Everyone gets the same puzzle on the same day, and yesterday’s moves into the archive where it stays playable.