Maestro n° 103 : Page 78 - Gr 75
L4C3 =3= L6C3 -3-8- L6C3 =8= L2C3 -8-7- L2C3 =7= L1C1 -7- L1C5 =7= L9C5 -7-9- L9C5 =9= L4C5 donc L4C5 ≠ 3 et L4C3 ≠ 9