Maestro n° 099 : Page 60 - Gr 57
L6C1 =7= L6C3 -7- L2C3 =7= L2C8 -7-6- L2C8 =6= L2C7 -6-4- L2C7 =4= L7C7 -4- L7C3 =4=7= L7C3 donc L6C3 et L78C1 ≠ 7