grandmaitre n° 17 : Page 62 - Grille 49
L2C5 =7= L2C7 -7-6- L2C7 =6= L1C7 -6-3- L1C7 =3= L1C23 -3- L2C1 =3=5= L2C1 -5- L2C5 donc L2C5 ≠ 5