Maestro n° 087 : Page 42 - Gr 39
L2C2 =7= L2C8 -7- L8C8 =7= L8C9 -7-9- L8C9 =9= L6C9 -9- L6C3 =9=8= L6C3 -8- L7C3 =8= L7C2 donc L7C2 ≠ 7 et L2C2 ≠ 8