Maestro n° 101 : Page 60 - Gr 57
L4C1 =6= L6C1 -6-7- L6C1 =7= L5C2 -7- L5C5 =7=9= L5C5 -9- L9C5 =9=6= L9C5 -6- L9C3 =6= L7C3 -6-5- L7C3 =5= L7C8 -5- L5C8 =5= L4C9 donc L4C1 ≠ 5 et L4C9 ≠ 6