Maestro n° 100 : Page 81 - Gr 78
L7C8 -8- L7C1 =8= L8C1 -8-2- L8C1 =2= L9C1 -2-5- L9C1 =5= L5C1 -5- L5C5 =5= L4C5 -5-4- L4C5 =4= L4C9 -4- L7C9 =4= L7C8 donc L7C8 ≠ 8