PlaySudoku.us
Hard · Puzzle #491
8
2
6
5
7
4
3
6
4
5
1
4
9
5
7
2
3
8
5
4
1
2
8
9
6
2
"Everything we call real is made of things that cannot be regarded as real." — Niels Bohr
"Everything we call real is made of things that cannot be regarded as real." — Niels Bohr
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.