toughnut.out x = 0 & y = 0 | x = 7 & y = 7)). end_of_list. clauses(theory). - G3(0,x). - G4(x,0). - G1(7,x). - G2(x,7). S(0,1). S(1,2). S(2,3). S(3,4). S(4,5). S(5,6). S(6,7). - S(x,y) | L(x,y). - L(x,y) | - L(y,z) | L(x,z). - L(x,y) | - L(y,z) | - S(x,z). - L(x,y) | x != y. G1(x,y) | G2(x,y) | G3(x,y) | G4(x,y) | G5(x,y). - G1(x,y) | - G2(x,y). - G1(x,y) | - G3(x,y). - G1(x,y) | - G4(x,y). - G1(x,y) | - G5(x,y). - G2(x,y) | - G3(x,y). - G2(x,y) | - G4(x,y). - G2(x,y) | - G5(x,y). - G3(x,y) | - G4(x,y). - G3(x,y) | - G5(x,y). - G4(x,y) | - G5(x,y). - S(x,y) | - G1(x,z) | G3(y,z). - S(x,y) | G1(x,z) | - G3(y,z). - S(x,y) | - G2(z,x) | G4(z,y). - S(x,y) | G2(z,x) | - G4(z,y). end_of_list. ]]>