Maestro n° 097 : Page 82 - Gr 79
L2C3 =5=4= L2C3 -4- L8C3 =4=6= L8C3 -6- L7C2 =6= L7C8 -6-5- L7C8 =5= L78C9 -5- L2C9 =5=4= L2C9 donc L2C3 ≠ 4 et L2C9 ≠ 5