Maestro n° 086 : Page 75 - Gr 72
L5C2 =3= L4C2 -3- L4C5 =3= L7C5 -3-2- L7C5 =2= L7C6 -2-6- L7C6 =6= L6C6 -6- L6C3 =6=9= L6C3 -9- L6C7 =9= L5C7 donc L5C7 ≠ 3 et L5C2 ≠ 9