Maestro n° 099 : Page 52 - Gr 49
L3C4 =4=7= L3C4 -7- L2C6 =7=9= L2C6 -9- L8C6 =9= L7C4 -9-5- L7C4 =5= L7C8 -5-4- L7C8 =4= L7C5 donc L3C5 et L9C4 ≠ 4