Binary Puzzle Books - 400 Easy to Master Puzzles 9x9 (Volume 10) - Softcover

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Binary puzzle (also known as “Takuzu”, “Tohu wa Vohu”) is a logic puzzle that you can solve by using only zeros and ones.
The rectangular or square grid should fill the numbers in accordance with the following rules:
• Each row and each column contain the same number of digits “1” as digits “0” (or one more for odd sized grids).
• The same number can only be in no more than two cells in a row.
• Each line must be unique, and each column must be unique.

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