Maestro n° 097 : Page 82 - Gr 79
L8C2 -6- L6C2 =6=7= L6C2 -7- L1C2 =7= L1C8 -7- L9C8 =7= L8C9 -7-5- L8C9 =5= L8C4 -5-9- L8C4 =9= L8C2 donc L8C2 ≠ 6