12x12 Binary Puzzles
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You have solved every puzzle at this level.
Tap a cell to cycle through 0, 1 and empty. With a keyboard, use the arrow keys, 0 and 1.
About 12x12 Binary Puzzles
Here are 12x12 puzzles to play or print. In a 12x12 grid every row and every column holds 6 ones and 6 zeros.
- Easy · hardest step: Half and half
- Medium · hardest step: Only one way
- Hard · hardest step: No twin lines
How to play
Write a 1 or a 0 in every cell. No three identical digits may sit side by side, each row and each column holds as many ones as zeros, and no two rows and no two columns are alike.
Solving techniques, step by step