Maestro n° 086 : Page 77 - Gr 74
L1C2 =2= L2C1 -2- L2C9 =2=4= L2C9 -4- L8C9 =4=7= L8C9 -7- L3C9 =7= L3C7 -7-1- L3C7 =1= L7C7 -1-5- L7C7 =5= L1C7 donc L1C7 ≠ 2 et L1C2 ≠ 5