About Tango Puzzle

A free, independent Tango game built around one idea: if the puzzle is good, you should be able to play as many as you want.

Why this site exists

Tango is a binary logic puzzle — fill a 6×6 grid with suns and moons, three of each per row and column, no three identical symbols in a line, and obey the = and × pair clues. It reached a wide audience as one of LinkedIn's daily puzzles, which hands you exactly one board per day and asks you to sign in first.

That daily cap is the whole reason this site exists. Once the rules click, one puzzle a day is not enough to actually get good at it. Here you get a freshly generated board whenever you want one, at three difficulty levels, with no account and no limit.

How the puzzles are made

Every board is generated on the fly in your browser, then checked by a solver before you ever see it. The solver's job is to confirm two things: that the puzzle can be finished by pure deduction, and that it has exactly one solution. Boards that fail either test are thrown away and regenerated.

This matters more than it sounds. A puzzle with two valid solutions can force you into a guess, and a guess in a logic puzzle is not a challenge — it is a coin flip. The generator is the part of this site that took the most work, and it is the reason you can trust that being stuck always means there is a deduction you have not spotted yet.

Difficulty is not just about how many symbols you start with. A board can have very few givens and still be easy, because the rules of Tango are strong enough to force most cells one after another — fewer clues does not mean deeper thinking.

So there is a second solver, and it is deliberately limited: it only knows the moves a human would try first — counting to three, breaking up an adjacent pair, following an = or × to its neighbour. It never guesses and never backtracks. Easy boards are ones this limited solver can finish completely, so you are never stuck. Hard boards are ones it cannot finish: if the obvious moves are enough to crack a board, that board is thrown away and never reaches you.

Who runs it

Tango Puzzle is built and maintained by an independent developer, not a company or a puzzle publisher. There is no team, no investors, and no roadmap beyond making the game better to play.

The site is free and supported by advertising. Nothing is gated, nothing asks you to register, and there is no premium tier.

Not affiliated with LinkedIn

This is an independent fan-made implementation. It is not affiliated with, endorsed by, or sponsored by LinkedIn Corporation. "Tango" is used here to describe the puzzle genre, which is also known as Takuzu and Binairo and predates any particular app.

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