Maestro n° 104 : Page 85 - Gr 82
L1C6 =5= L5C6 -5-1- L5C6 =1= L7C6 -1-4- L7C6 =4= L7C5 -4-3- L7C5 =3= L3C5 -3- L3C2 =3=5= L3C2 donc L1C2 et L3C5 ≠ 5