Maestro n° 103 : Page 86 - Gr 83
L1C8 =5= L7C8 -5- L8C7 =5= L8C1 -5-1- L8C1 =1= L8C9 -1- L9C8 =1= L2C8 -1-9- L2C8 =9= L1C8 donc L12C8 ≠ 2 et L12C8 ≠ 7