Maestro n° 102 : Page 77 - Gr 74
L5C4 =2=3= L5C4 -3- L1C4 =3=1= L1C4 -1- L1C2 =1=7= L1C2 -7- L3C3 =7=5= L3C3 -5- L3C6 =5= L1C6 -5-3- L1C6 =3= L5C6 donc L5C6 ≠ 2 et L5C4 ≠ 3