Maestro n° 100 : Page 72 - Gr 69
L6C3 =7= L9C3 -7- L9C7 =7= L8C9 -7-8- L8C9 =8= L8C8 -8- L4C8 =8=7= L4C8 -7- L6C8 =7=3= L6C8 donc L6C3 ≠ 3 et L6C8 ≠ 7