Created
June 27, 2009 08:44
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8 queens problem solver in prolog
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solution([]). | |
solution([X/Y | Others]) :- | |
solution(Others), | |
member(Y, [1, 2, 3, 4, 5, 6, 7, 8]), | |
noattack(X/Y, Others). | |
noattack(_, []). | |
noattack( X/Y,[X1/Y1 | Others]) :- | |
Y =\= Y1, | |
Y1 - Y =\= X1 - X, | |
Y1 - Y =\= X - X1, | |
noattack(X/Y, Others). | |
member(Item, [Item | Rest]). | |
member(Item, [First | Rest]) :- | |
member(Item, Rest). | |
template([1/Y1, 2/Y2, 3/Y3, 4/Y4, 5/Y5, 6/Y6, 7/Y7, 8/Y8]). |
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