Maestro n° 097 : Page 82 - Gr 79
L9C6 -2- L8C5 =2=7= L8C5 -7- L8C9 =7= L3C9 -7-3- L3C9 =3= L3C8 -3- L6C8 =3= L6C3 -3-6- L6C3 =6= L8C3 -6- L8C6 =6= L9C6 donc L9C6 ≠ 2