Maestro n° 102 : Page 81 - Gr 78
L6C3 -3- L7C3 =3= L8C1 -3-9- L8C1 =9= L8C2 -9-1- L8C2 =1= L6C2 -1-5- L6C2 =5= L6C3 donc L6C3 ≠ 3