Maestro n° 102 : Page 84 - Gr 81
L2C5 -3- L2C3 =3=8= L2C3 -8- L9C3 =8= L9C7 -8-7- L9C7 =7= L9C4 -7- L2C4 =7= L2C5 donc L2C5 ≠ 3