Maestro n° 085 : Page 83 - Gr 80
L6C9 -5- L6C8 =5=9= L6C8 -9- L7C8 =9=7= L7C8 -7- L3C8 =7= L2C9 -7-6- L2C9 =6= L6C9 donc L6C9 ≠ 5