grandmaitre n° 17 : Page 61 - Grille 48
L6C5 -7- L1C5 =7= L2C4 -7- L2C7 =7=1= L2C7 -1- L2C6 =1=8= L2C6 -8- L3C5 =8= L6C5 donc L6C5 ≠ 7