Maestro n° 103 : Page 47 - Gr 44
L9C5 =4= L1C5 -4-7- L1C5 =7= L2C5 -7- L2C9 =7= L3C9 -7-4- L3C9 =4= L3C6 -4- L7C6 =4= L7C1 -4- L9C3 =4=8= L9C3 donc L9C3 ≠ 4 et L9C5 ≠ 8