Maestro n° 087 : Page 86 - Gr 83
L6C4 -5- L6C8 =5=7= L6C8 -7- L3C8 =7=9= L3C8 -9- L3C5 =9= L2C5 -9-5- L2C5 =5= L2C4 -5- L6C4 donc L6C4 ≠ 5