Maestro n° 101 : Page 62 - Gr 59
L1C4 =5=8= L1C4 -8- L8C4 =8= L8C9 -8- L2C9 =8=7= L2C9 -7- L2C5 =7= L3C5 -7-5- L3C5 =5= L3C2 donc L1C1 et L3C5 ≠ 5