Maestro n° 104 : Page 83 - Gr 80
L4C5 -6- L4C4 =6= L1C4 -6-7- L1C4 =7= L1C2 -7-4- L1C2 =4= L4C2 -4- L5C3 =4=6= L5C3 -6- L5C9 =6=2= L5C9 -2- L7C9 =2= L7C5 -2- L9C5 =2=6= L9C5 -6- L4C5 donc L4C5 ≠ 6