Maestro n° 097 : Page 54 - Gr 51
L7C1 -9- L7C8 =9=6= L7C8 -6- L7C2 =6= L1C2 -6- L2C3 =6=5= L2C3 -5- L8C3 =5= L7C1 donc L7C1 ≠ 9