Maestro n° 086 : Page 66 - Gr 63
L1C2 =2= L1C8 -2- L6C8 =2= L5C7 -2-7- L5C7 =7= L5C9 -7-6- L5C9 =6= L3C9 -6-4- L3C9 =4= L3C2 donc L3C2 ≠ 2 et L1C2 ≠ 4