Maestro n° 104 : Page 87 - Gr 84
L1C8 -7- L4C8 =7=8= L4C8 -8- L9C8 =8=2= L9C8 -2- L9C3 =2= L5C3 -2-6- L5C3 =6= L5C9 -6- L2C9 =6= L1C8 donc L1C8 ≠ 7