Maestro n° 101 : Page 75 - Gr 72
L6C5 =7= L6C7 -7-4- L6C7 =4= L6C3 -4- L4C2 =4=2= L4C2 -2- L46C3 =2= L7C3 -2-3- L7C3 =3= L7C5 donc L6C5 ≠ 3 et L7C5 ≠ 7