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