grandmaitre n° 5 : Page 29 - Grille 11
L3C5 =8= L3C7 -8- L6C7 =8= L6C3 -8- L9C3 =8= L9C6 -8- L2C6 =8= L3C5 donc L2C6, L3C7 et L8C5 ≠ 8