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valid([Head|Tail]) :-
sudoku(Puzzle, Solution) :-
Solution = Puzzle,
Puzzle = [A1, A2, A3, A4, A5, A6,
B1, B2, B3, B4, B5, B6,
C1, C2, C3, C4, C5, C6,
D1, D2, D3, D4, D5, D6,
E1, E2, E3, E4, E5, E6,
F1, F2, F3, F4, F5, F6],
fd_domain(Puzzle, 1, 6),
Row1 = [A1, A2, A3, A4, A5, A6],
Row2 = [B1, B2, B3, B4, B5, B6],
Row3 = [C1, C2, C3, C4, C5, C6],
Row4 = [D1, D2, D3, D4, D5, D6],
Row5 = [E1, E2, E3, E4, E5, E6],
Row6 = [F1, F2, F3, F4, F5, F6],
Col1 = [A1, B1, C1, D1, E1, F1],
Col2 = [A2, B2, C2, D2, E2, F2],
Col3 = [A3, B3, C3, D3, E3, F3],
Col4 = [A4, B4, C4, D4, E4, F4],
Col5 = [A5, B5, C5, D5, E5, F5],
Col6 = [A6, B6, C6, D6, E6, F6],
Square1 = [A1, A2, A3, B1, B2, B3],
Square2 = [A4, A5, A6, B4, B5, B6],
Square3 = [C1, C2, C3, D1, D2, D3],
Square4 = [C4, C5, C6, D4, D5, D6],
Square5 = [E1, E2, E3, F1, F2, F3],
Square6 = [E4, E5, E6, F4, F5, F6],
valid([Row1, Row2, Row3, Row4, Row5, Row6,
Col1, Col2, Col3, Col4, Col5, Col6,
Square1, Square2, Square3, Square4, Square5, Square6]).
You can’t perform that action at this time.