Maestro n° 100 : Page 72 - Gr 69
L1C8 =3= L1C7 -3-7- L1C7 =7= L9C7 -7- L9C3 =7=6= L9C3 -6- L3C3 =6= L3C9 -6- L5C9 =6= L5C8 donc L5C8 ≠ 3 et L1C8 ≠ 6