Created
December 1, 2018 11:08
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Solution of puzzle at https://www.youtube.com/watch?v=-etLb-8sHBc
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correct_position(A, B, C, S) :- S = [A, _, _], \+ member(B, S), \+ member(C, S). | |
correct_position(A, B, C, S) :- S = [_, B, _], \+ member(A, S), \+ member(C, S). | |
correct_position(A, B, C, S) :- S = [_, _, C], \+ member(A, S), \+ member(B, S). | |
wrong_position(A, B, C, S) :- (S = [_, A, _] ; S = [_, _, A]), \+ member(B, S), \+ member(C, S). | |
wrong_position(A, B, C, S) :- (S = [B, _, _] ; S = [_, _, B]), \+ member(A, S), \+ member(C, S). | |
wrong_position(A, B, C, S) :- (S = [C, _, _] ; S = [_, C, _]), \+ member(A, S), \+ member(B, S). | |
two_wrong_position(A, B, C, S) :- S \= [A, _, _], S \= [_, B, _], member(A, S), member(B, S), \+ member(C, S). | |
two_wrong_position(A, B, C, S) :- S \= [A, _, _], S \= [_, _, C], member(A, S), member(C, S), \+ member(B, S). | |
two_wrong_position(A, B, C, S) :- S \= [_, B, _], S \= [_, _, C], member(B, S), member(C, S), \+ member(A, S). | |
none(A, B, C, S) :- \+ member(A, S), \+ member(B, S), \+ member(C, S). | |
solution(S) :- | |
between(0, 9, A), between(0, 9, B), between(0, 9, C), S = [A, B, C], | |
correct_position(6, 8, 2, S), | |
wrong_position(6, 4, 5, S), | |
two_wrong_position(2, 0, 6, S), | |
none(7, 3, 8, S), | |
wrong_position(7, 8, 0, S). |
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