Sudoku Suprême n° 039 : Page 63 - Gr 60
L7C7 -9- L1C7 =9= L1C8 -9-2- L1C8 =2= L2C8 -2- L2C2 =2= L6C2 -2-3- L6C2 =3= L7C2 -3-6- L7C2 =6= L7C7 donc L7C7 ≠ 9