Fair leaderboard
Everyone solves the identical daily board, so the ranking is not a lottery of easy and hard boards.
One puzzle a day. The whole world on one leaderboard.
Logic puzzles are everywhere. A leaderboard that actually means something is not — because it only works when everyone solves the identical board.
- home.hero.facts
Pick a difficulty and play
- Easy Level 1 of 4. Just fill in the digits that have only one option left. A good place to start. Play
- Medium Level 2 of 4. You now have to rule digits out of a row, a column and a box on purpose. Play
- Hard Level 3 of 4. Few digits to start with. Needs pairs and triples, not just looking. Play
- Expert Level 4 of 4. Minimum clues. For people who count their time in seconds. Play
Why here and not anywhere else
Your place in the world
Not just a time — a percentile and a distribution curve. See exactly where you land.
Country ranking
Your result moves your country's median. Compare nations, not just players.
No sign-up
Pick a nickname, choose a country, play. No email, no password, no cookie wall.