Maestro n° 102 : Page 75 - Gr 72
L3C7 =2=4= L3C7 -4- L9C7 =4=9= L9C7 -9- L9C2 =9= L8C2 -9-6- L8C2 =6= L8C1 -6- L6C1 =6= L5C3 -6- L5C5 =6= L4C5 -6- L4C9 =6=2= L4C9 donc L2C9 et L6C7 ≠ 2