Sudoku Suprême n° 039 : Page 79 - Gr 76
L3C6 -1- L7C6 =1=9= L7C6 -9- L7C9 =9= L3C9 -9-3- L3C9 =3= L1C7 -3- L1C3 =3=7= L1C3 -7- L1C6 =7= L3C6 donc L3C6 ≠ 1