Sudoku Suprême n° 039 : Page 42 - Gr 39
L5C1 =3= L5C7 -3- L23C7 =3= L2C9 -3-1- L2C9 =1= L2C4 -1-7- L2C4 =7= L2C5 -7- L4C5 =7= L4C6 -7-3- L4C6 =3= L6C46 donc L6C3 ≠ 3