Maestro n° 104 : Page 86 - Gr 83
L6C7 =2= L8C7 -2-6- L8C7 =6= L8C3 -6-4- L8C3 =4= L5C3 -4-8- L5C3 =8= L3C3 -8- L3C8 =8= L1C8 -8-4- L1C8 =4= L6C8 donc L6C8 ≠ 2 et L6C7 ≠ 4