Maestro n° 104 : Page 82 - Gr 79
L1C5 =9= L1C6 -9-5- L1C6 =5= L1C3 -5- L4C3 =5=8= L4C3 -8- L9C3 =8= L9C1 -8-4- L9C1 =4= L9C5 donc L1C5 ≠ 4 et L9C5 ≠ 9