Maestro n° 099 : Page 72 - Gr 69
L2C1 =1= L6C1 -1- L5C3 =1=6= L5C3 -6- L5C5 =6= L6C6 -6-7- L6C6 =7= L6C4 -7- L8C4 =7= L8C9 -7-8- L8C9 =8= L2C9 donc L2C9 ≠ 1 et L2C1 ≠ 8