Maestro n° 087 : Page 83 - Gr 80
L1C8 =1=4= L1C8 -4- L1C4 =4= L9C4 -4-1- L9C4 =1= L4C4 -1-5- L4C4 =5= L4C9 -5-6- L4C9 =6= L4C8 -6- L3C8 =6=1= L3C8 donc L1C9 et L467C8 ≠ 1