0 0 0 0 0 0 0 3 9
0 0 0 0 0 1 0 0 5
0 0 3 0 5 0 8 0 0
0 0 8 0 9 0 0 0 6
0 7 0 0 0 2 0 0 0
1 0 0 4 0 0 0 0 0
0 0 9 0 8 0 0 5 0
0 2 0 0 0 0 6 0 0
4 0 0 7 0 0 0 0 0
 
Sudoku le plus difficile au monde?
SER=11,9 (sudoku explainer)