Maestro n° 101 : Page 66 - Gr 63
L1C1 =5= L1C9 -5-4- L1C9 =4= L1C7 -4- L5C7 =4= L5C3 -4-6- L5C3 =6= L5C5 -6- L3C5 =6= L3C8 -6-7- L3C8 =7= L3C1 donc L3C1 ≠ 5 et L1C1 ≠ 7