Maestro n° 087 : Page 76 - Gr 73
L1C4 =6=9= L1C4 -9- L5C4 =9= L5C5 -9-4- L5C5 =4= L5C3 -4- L2C3 =4= L2C7 -4-9- L2C7 =9= L2C5 donc L2C5 ≠ 6 et L1C4 ≠ 9