Maestro n° 087 : Page 74 - Gr 71
L4C8 =3= L7C8 -3-7- L7C8 =7= L7C1 -7- L1C1 =7=4= L1C1 -4- L1C8 =4=9= L1C8 -9- L6C8 =9=5= L6C8 -5- L6C5 =5= L4C5 donc L4C5 ≠ 3 et L4C8 ≠ 5