Maestro n° 086 : Page 85 - Gr 82
L4C4 -6- L1C4 =6=9= L1C4 -9- L1C1 =9= L3C1 -9-2- L3C1 =2= L2C2 -2- L2C5 =2=5= L2C5 -5- L2C4 =5= L4C4 donc L4C4 ≠ 6