Maestro n° 100 : Page 76 - Gr 73
L1C1 =4=2= L1C1 -2- L9C1 =2= L9C9 -2- L6C9 =2=7= L6C9 -7- L1C9 =7=5= L1C9 -5- L2C7 =5= L7C7 -5- L7C2 =5= L8C2 -5-2- L8C2 =2= L1C2 donc L1C1 ≠ 2 et L1C2 ≠ 4