GSW_AI_LAB/tempest-devel/resources/3rdparty/glpk-4.65/examples/sudoku.dat

/* sudoku.dat, a hard Sudoku puzzle which causes branching */

data;

param givens : 1 2 3 4 5 6 7 8 9 :=
           1   1 . . . . . 7 . .
           2   . 2 . . . . 5 . .
           3   6 . . 3 8 . . . .
           4   . 7 8 . . . . . .
           5   . . . 6 . 9 . . .
           6   . . . . . . 1 4 .
           7   . . . . 2 5 . . 9
           8   . . 3 . . . . 6 .
           9   . . 4 . . . . . 2 ;

end;