Maestro n° 097 : Page 69 - Gr 66
L1C4 =9=6= L1C4 -6- L9C4 =6=7= L9C4 -7- L3C4 =7=5= L3C4 -5- L7C4 =5= L8C5 -5-6- L8C5 =6= L1C5 donc L1C4 ≠ 6 et L1C5 ≠ 9