Maestro n° 099 : Page 85 - Gr 82
L5C7 =4= L5C3 -4- L6C2 =4= L7C2 -4-6- L7C2 =6= L1C2 -6- L1C5 =6=5= L1C5 -5- L6C5 =5= L6C7 donc L6C7 ≠ 4 et L5C7 ≠ 5