grandmaitre n° 17 : Page 63 - Grille 50
L5C4 -2- L5C2 =2=1= L5C2 -1- L5C8 =1= L4C8 -1-7- L4C8 =7= L4C9 -7- L3C9 =7= L3C6 -7- L2C5 =7=3= L2C5 -3- L2C4 =3=2= L2C4 -2- L5C4 donc L5C4 ≠ 2