Maestro n° 097 : Page 86 - Gr 83
L4C5 -3- L1C5 =3= L1C4 -3-7- L1C4 =7= L1C1 -7-9- L1C1 =9= L1C3 -9- L9C3 =9= L9C7 -9- L4C7 =9= L4C5 donc L4C5 ≠ 3