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Binary Puzzle

Fill the grid with 0s and 1s. No three in a row, equal counts per row and column!

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Frequently Asked Questions about Binary Puzzle

What is Binary Puzzle (Takuzu / Binairo)?
Binary Puzzle (also called Takuzu or Binairo) is a logic puzzle where you fill a grid with 0s and 1s. Three rules apply: no more than two consecutive identical digits in any row or column, each row and column must have an equal number of 0s and 1s, and no two rows or columns can be identical.
How do you solve a Binary Puzzle?
Start by looking for any row or column that already has two consecutive identical digits, because the next must be different. Then check if any row or column is halfway complete so you can fill in the remaining cells. Finally, compare rows/columns that look similar to ensure no duplicates. Work through these patterns repeatedly until the grid is solved.
Is Binary Puzzle the same as Takuzu?
Yes! Binary Puzzle, Takuzu, Binairo, and 0h h1 are all names for the same logic puzzle. The rules are identical: fill a grid with 0s and 1s following three logical constraints. It's related to Latin squares and is a great brain training exercise.
Is Binary Puzzle free online?
Yes! Play Binary Puzzle free at PlayBrain. We have 15 puzzles across three grid sizes (6x6, 8x8, 10x10). No download, no sign-up, and your progress is saved automatically. New to logic puzzles? Start with the 6x6 grid.
What grid sizes are available?
PlayBrain offers Binary Puzzle in three difficulty levels: 6x6 (easy, 15 cells to fill), 8x8 (medium, 32 cells), and 10x10 (hard, 50 cells). Each grid is randomly generated for a fresh challenge every time.

About Binary Puzzle

Binary Puzzle is a logic game played on a grid that must be filled with zeros and ones according to three simple rules: each row and column must contain an equal number of 0s and 1s, no more than two consecutive identical digits are allowed in any row or column, and all rows must be unique (same for columns). Despite these straightforward constraints, the puzzles require careful deductive reasoning to solve. You start with some cells pre-filled and must determine the value of every remaining cell without violating any rule. It shares the logical satisfaction of Sudoku but with a binary twist that feels distinct and fresh. The puzzles range from beginner-friendly small grids to expert-level large grids that demand extended chains of reasoning. Binary Puzzle is an excellent brain workout that develops logical thinking and pattern recognition skills.

How to Play

  1. Click an empty cell to toggle between 0 and 1.
  2. Ensure no more than two consecutive identical digits appear in any direction.
  3. Each row and column must have an equal number of 0s and 1s.
  4. All rows must be unique, and all columns must be unique.