Virtuose n° 113 : Page 83 - Gr 80
L8C7 -4- L1C7 =4= L1C3 -4-6- L1C3 =6= L2C3 -6-2- L2C3 =2= L2C2 -2- L8C2 =2= L8C7 donc L8C7 ≠ 4