7
5
6
1
3
2
8
9
6
8
9
1
2
2
9
6
3
8
1
1
6
3
4
5
1
6
5
1
4
3
2
1
6
3
5
"In science, there are no shortcuts to truth." — Karl Popper
"In science, there are no shortcuts to truth." — Karl Popper
There are Sudoku World Championships held annually, with competitors from over 30 countries.
There are Sudoku World Championships held annually, with competitors from over 30 countries.