Binary
Tap a square to cycle through 0, 1 and empty.
Free binary, whenever you fancy.
Play free binary logic puzzles, also known as Takuzu. Balance zeros and ones in a uniquely solvable 6 × 6 grid, with daily and unlimited play.
Can I play more than once a day?
Yes. Daily mode gives everyone the same puzzle seed, refreshed at midnight UTC. Unlimited mode starts another round whenever you want. Word-based puzzles reuse a curated word and clue bank; puzzle content can recur.
Do I need an account?
No. Play immediately and keep boards in this browser. Connect Google to save up to 120 recent completed results across devices. In-progress collection boards stay on the device where you started them.
How do I challenge a friend?
Use Challenge a friend or Share your result. The link opens this game with the same puzzle seed. Your result text avoids revealing the solution. Collection results are personal activity records; the central Brisk daily six has its own server-checked ranking.