Maestro n° 101 : Page 77 - Gr 74
L4C3 =2= L6C3 -2-8- L6C3 =8= L6C1 -8- L8C1 =8=2= L8C1 -2- L1C1 =2=9= L1C1 -9- L1C6 =9=1= L1C6 -1- L1C9 =1= L4C9 donc L4C3 ≠ 1 et L4C9 ≠ 2