Takuzu
Bring zeros and ones into balance. Simple rules make for surprisingly good thinking.
Tap to cycle: empty → 0 → 1 → empty.
How to play Takuzu
- Fill the board with 0s and 1s, with equal numbers of each in every row and column.
- Never place three identical digits consecutively, horizontally or vertically.
- Every completed row must be different from every other row. The same is true of columns.
Make your move
Tap an empty square to enter 0, tap again for 1, and once more to clear it. You can also select a square and type 0 or 1. Starting clues stay fixed.
Find your level
Start with Beginner or Easy to learn the rules, choose Medium for a steady challenge, or explore Hard and Expert when available. Ratings use each game’s solver effort and clue structure. Some size and difficulty combinations are unavailable until they can be generated reliably.
Every new puzzle is generated on your device and checked for a unique solution. You can pause, get a hint, or come back later. Your progress stays in this browser.
A little more to know
Is Takuzu the same as a binary puzzle?+
Yes. It is also commonly called Binairo. This version includes the rule that all completed rows and columns must be distinct.
Do diagonal lines matter?+
No. Only horizontal rows and vertical columns are checked.
Can I share this exact puzzle?+
Yes. Use Share to copy a link with the puzzle’s ID. The same version, size, difficulty and seed recreate the same starting puzzle. Your answers are not shared.
Is my progress saved?+
Your puzzle, timer, notes and undo history save automatically in this browser when storage is available. Private browsing, clearing website data or changing devices may remove access to your save.