Sudoku Suprême n° 039 : Page 86 - Gr 83
L9C7 -2- L2C7 =2=1= L2C7 -1- L2C6 =1= L4C6 -1- L6C5 =1=8= L6C5 -8- L6C8 =8=9= L6C8 -9- L5C7 =9= L9C7 donc L9C7 ≠ 2