Maestro n° 104 : Page 82 - Gr 79
L1C8 =7=6= L1C8 -6- L1C6 =6= L8C6 -6- L8C4 =6=4= L8C4 -4- L9C5 =4= L9C1 -4-8- L9C1 =8= L9C3 -8- L4C3 =8=5= L4C3 -5- L1C3 =5= L1C56 -5- L2C6 =5=7= L2C6 donc L1C56 et L2C9 ≠ 7