The SUDOKU.lng Model

The Sudoku Puzzle

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Fill out a 9x9 grid with the digits 1,2,...9, so that each digit appears once in

a) each column,
b) each row,
c) each of the nine 3x3 subsquares,
d) the main diagonal,
e) in the reflected diagonal;
Some versions of the puzzle do not require (d) and (e)


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