Maestro n° 085 : Page 86 - Gr 83
L8C3 =7=5= L8C3 -5- L8C4 =5=8= L8C4 -8- L8C2 =8= L7C2 -8-4- L7C2 =4= L7C1 -4-2- L7C1 =2= L7C6 -2-7- L7C6 =7= L9C6 -7- L9C3 =7=5= L9C3 donc L8C3 ≠ 5 et L9C3 ≠ 7