Maestro n° 099 : Page 50 - Gr 47
L6C1 =1= L6C5 -1-4- L6C5 =4= L5C5 -4- L5C1 =4= L23C1 -4- L1C2 =4=6= L1C2 -6- L1C78 =6= L23C9 -6- L9C9 =6=1= L9C9 -1- L9C1 =1=3= L9C1 donc L9C1 ≠ 1 et L6C1 ≠ 3