Maestro n° 102 : Page 67 - Gr 64
L6C5 =5= L5C5 -5-2- L5C5 =2= L5C6 -2- L1C6 =2=7= L1C6 -7- L1C4 =7= L5C4 -7- L5C3 =7=6= L5C3 -6- L2C3 =6=1= L2C3 -1- L2C7 =1= L5C7 -1-8- L5C7 =8= L6C7 donc L6C7 ≠ 5 et L6C5 ≠ 8