Takuzu
Play Takuzu free online: fill grids with 0s and 1s following three simple rules. A minimalist brain teaser that requires pure deduction and awards Retro Coins.
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How it works
Play, earn points and Retro Coins: the shared currency across every RetroPlayNow game. Unlock badges and climb the leaderboard! Your progress is saved automatically on this device.
Takuzu, also known as Binairo, is proof that the deepest logic puzzles need only two symbols. You are given a grid where each cell must be filled with either a 0 or a 1. Three simple rules govern the solution, and from those rules emerges extraordinary depth.
Rule one: no more than two identical numbers may be adjacent. You can never have three 0s or three 1s in a row horizontally or vertically. Rule two: each row and column must contain an equal number of 0s and 1s. Rule three: no two rows and no two columns may be identical.
That is it. No arithmetic, no colors, no words. And yet Takuzu puzzles range from gentle warm-ups on 4x4 grids to brain-bending challenges on 12x12 and beyond. The constraints interact in beautiful ways: knowing that a row already has its full count of 1s forces every remaining cell to 0. Recognizing that placing a 1 would create three in a row forces a 0.
Our RetroPlayNow version generates puzzles at multiple sizes, offers a toggle between 0 and 1 with a tap, highlights rule violations in red in real time, and tracks your solving speed for the leaderboard. Every completed grid earns Retro Coins.
How to play Takuzu
- Fill with 0s and 1s. Tap empty cells to cycle between 0 and 1. Your goal is to fill every cell in the grid.
- No three in a row. Never place three identical numbers adjacent horizontally or vertically. Two is fine, three is forbidden.
- Equal counts per line. Each row and each column must contain exactly the same number of 0s and 1s.
- No duplicate lines. Every row must be different from every other row. Every column must be different from every other column.
- Earn Retro Coins. Complete puzzles to score points based on size and speed. Faster solutions earn more Retro Coins.
