Maestro n° 086 : Page 58 - Gr 55
L3C9 =6=2= L3C9 -2- L3C6 =2= L2C6 -2-1- L2C6 =1= L2C4 -1-7- L2C4 =7= L8C4 -7- L8C8 =7=6= L8C8 donc L3C8 et L789C9 ≠ 6