Maestro n° 103 : Page 85 - Gr 82
L8C3 -9- L8C5 =9= L7C5 -9-7- L7C5 =7= L2C5 -7-4- L2C5 =4= L2C1 -4-6- L2C1 =6= L4C1 -6-9- L4C1 =9= L4C3 -9- L8C3 donc L8C3 ≠ 9