What is the Binairo game?
Binairo is a binary logic puzzle created by Belgian puzzle makers Peter De Schepper and Frank Coussement. You fill an even-sided grid with two symbols — traditionally black and white circles, commonly written as 0s and 1s — under three rules: no three identical symbols adjacent in any row or column, an equal count of each symbol in every row and column, and no two identical rows or columns anywhere on the board.
That third rule is Binairo's signature. Most moves come from capping pairs and counting quotas, but on harder boards the moment arrives when only the unique-lines rule can decide a cell — a deduction style no other number-free puzzle quite has.
Here you can play a new daily Binairo shared by every player, plus 600 unlimited boards across five sizes from 6×6 to 14×14, each verified to have exactly one solution reachable by logic alone.
Binairo vs. Takuzu vs. Tango: what's the difference?
Binairo and Takuzu are the same puzzle under different names — the Belgian and Japanese-styled brandings of the classic binary grid, both using all three rules. Binero, Binoxxo, Tic-Tac-Logic, and Tohu-wa-Vohu are further regional names for the identical ruleset, and Simon Tatham's puzzle collection ships it as Unruly.
Tango — the LinkedIn daily puzzle — is the format's modern descendant. It keeps the fill-and-balance core (suns and moons instead of digits) but changes the deduction toolkit: Tango adds = and × signs that pin pairs of neighboring cells, stays at 6×6, and drops the unique-lines rule entirely. The signs make small grids snappy; classic Binairo instead scales the challenge with board size and that third rule.
If Tango is your daily habit and you want more of the same logic, classic Binairo is the natural next step: same instincts, bigger boards, and a technique ladder that goes deeper. Our sister site Tango Unlimited (linked in the footer) covers the sign-based variant; this site is the home of the classic game.
Every size, every difficulty
The daily board is always a medium 8×8 or 10×10 — approachable but never trivial, and identical for everyone, which makes shared solve times meaningful. The unlimited collection spans 6×6, 8×8, 10×10, 12×12, and 14×14, each in easy, medium, and hard.
Difficulty here means technique, not clue count: easy boards need only pairs, sandwiches, and counting; medium boards require analyzing how a line can be completed; hard boards genuinely require the unique-lines rule. No board ever requires guessing.