Maestro n° 087 : Page 87 - Gr 84
L5C7 =6= L5C3 -6- L4C3 =6=8= L4C3 -8- L1C3 =8= L1C46 -8- L3C5 =8= L456C5 -8- L6C4 =8=6= L6C4 donc L6C89 ≠ 6