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The Rules of suduku
The classic Suduku game involves a grid of 81 squares.
The grid is divided into nine blocks, each containing nine squares.
The rules of the game are simple: each of the nine blocks has to contain
all the numbers 1-9 within its squares. Each number can only appear once
in a row, column or box.
The difficulty lies in that each vertical nine-square column, or
horizontal nine-square line across, within the larger square, must also
contain the numbers 1-9, without repetition or omission.
Every puzzle has just one correct solution.
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