Maestro n° 087 : Page 81 - Gr 78
L6C2 =9= L6C1 -9-6- L6C1 =6= L6C6 -6- L5C5 =6=2= L5C5 -2- L5C9 =2= L6C8 -2- L9C8 =2=4= L9C8 -4- L9C1 =4=9= L9C1 donc L6C1 et L7C2 ≠ 9