Sudoku Suprême n° 039 : Page 71 - Gr 68
L1C3 -1- L1C8 =1=9= L1C8 -9- L8C8 =9= L8C2 -9-5- L8C2 =5= L1C2 -5-2- L1C2 =2= L1C3 donc L1C3 ≠ 1