Tango Puzzle: Free Binary Logic Alternatives to LinkedIn Tango

Tango takes a puzzle genre that's existed for years under names like Takuzu and Binairo — fill a grid with two symbols so every line balances and nothing repeats three times in a row — and adds one sharp twist: "=" and "×" hints pinned between specific cells, telling you exactly when two neighbors must match or must differ. That small addition turns a counting exercise into a real deduction chain. Here's how the genre works, and where to play it free.

The rule that actually drives the solve

Two constraints alone — no three of the same symbol in a row, and an even split of each symbol per line — already rule out a lot. But on their own they leave a symmetry problem: flip every symbol on a valid board and you get an equally valid board, so a puzzle with no fixed clues can never have a single answer. That's exactly what the "=" and "×" hints, plus a couple of pre-filled cells, exist to break. Once one cell is pinned down, the hints chain that certainty outward across the whole board.

1. Tango — our daily binary logic puzzle

Tango is a free, independently built binary logic puzzle with the same rule set: balance every row and column, never three of the same symbol in a row, and follow the "=" / "×" hints between neighboring cells. Every board is generated by starting from a complete valid grid and removing clues one at a time, checking after each removal that exactly one completion still exists — so what you're handed is always provably unique.

What you get beyond the original: no account required, a 6×6 board free with an 8×8 for Pro, unlimited practice, a solve timer, and a leaderboard.

2. Queens — the other half of the LinkedIn set

Queens is Tango's natural companion: one crown per row, column and colored region, no two touching. Different constraint entirely, same publisher, same five-minute daily habit.

3. Sudoku — the original constraint puzzle

If you like Tango for the "this cell can only be one thing" feeling, Sudoku gives you the same satisfaction with nine symbols instead of two. Start with our Sudoku solving techniques for beginners if you're making the jump.

4. Domino Regions — constraint logic with pieces

Domino Regions fills colored regions with dominoes under sum, equality and comparison rules — a related but distinct kind of constraint puzzle. More in our domino puzzle games guide.

5. Categories — pattern logic without a grid

Categories trades rows and columns for a flat set of sixteen words hiding four groups. If Tango appeals because you're testing a hypothesis and revising it, Categories exercises the exact same muscle in a completely different shape.

How to solve a Tango board faster

1. 1Two of a kind forces the third. The moment two identical symbols sit side by side, every cell touching that pair must be the opposite symbol — this single rule resolves more of the board than any other trick.
2. 2Finish a line by counting. Once a row already has its full share of one symbol, every remaining blank in that row must be the other one.
3. 3Chain the hints outward. An "=" or "×" hint is only useful once you know one side of it — solve the plain cells first and let each hint push its value onto the next cell.