Sudoku Suprême n° 037 : Page 61 - Gr 58
L7C4 -9- L6C4 =9= L6C7 -9-6- L6C7 =6= L5C8 -6- L9C8 =6= L9C9 -6-4- L9C9 =4= L2C9 -4-9- L2C9 =9= L1C9 -9- L1C5 =9=1= L1C5 -1- L5C5 =1= L5C4 -1-7- L5C4 =7= L7C4 donc L7C4 ≠ 9