Maestro n° 097 : Page 64 - Gr 61
L6C8 =5= L5C9 -5-4- L5C9 =4= L2C9 -4- L3C7 =4= L3C2 -4- L7C2 =4= L7C3 -4-8- L7C3 =8= L8C1 -8-9- L8C1 =9= L8C8 donc L8C8 ≠ 5 et L6C8 ≠ 9