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Codeword a Day 2022
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What are the rules for solving binary puzzles?

The rules of the binary puzzle are to fill in the grid in such a way that the number of 0s and 1s in each row and column of the grid balance.

In other words, there must be the same number of each in each row and column and thus in the grid.

So in a 10 x 10 puzzle there should be 5 0's and 5 1's in each row and column.

Also there cannot be more than two of the same digit in a row, thus if you have '00' then there must be a 1 on either side of the 0's assuming they are not at the edge of the puzzle.

The final rule to ensure uniqueness is that each total combination of rows must be unique, and the same for columns.

Thus if you have a row that reads 0101010101 when filled, no other row in the puzzle can have exactly the same combination of 0's and 1's when filled.

The solving strategies for binary puzzles are all around working within these rules to help you reduce the options and therefore be able to place with certainty the value in each cell of the puzzle.


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