Maestro n° 087 : Page 83 - Gr 80
L3C7 -1- L3C8 =1=6= L3C8 -6- L4C8 =6= L4C9 -6-5- L4C9 =5= L4C4 -5-1- L4C4 =1= L9C4 -1-4- L9C4 =4= L9C8 -4- L1C8 =4= L3C7 donc L3C7 ≠ 1