Maestro n° 085 : Page 78 - Gr 75
L4C5 =6= L4C7 -6- L1C7 =6= L1C3 -6-3- L1C3 =3= L4C3 -3-7- L4C3 =7= L6C2 -7-5- L6C2 =5= L6C5 donc L4C5 ≠ 5 et L6C5 ≠ 6