PlaySudoku.us
Medium · Puzzle #811
8
7
4
9
2
5
7
3
9
2
1
8
6
7
6
4
3
1
7
3
1
8
9
1
4
6
8
9
6
2
1
7
5
7
8
9
1
The pigeonhole principle explains why 8 clues are never enough to guarantee a unique Sudoku solution.
The pigeonhole principle explains why 8 clues are never enough to guarantee a unique Sudoku solution.
"Somewhere behind the athlete you've become and the hours of practice and the coaches who have pushed you is a little girl who fell in love with the game and never lost the joy of it." — Mia Hamm
"Somewhere behind the athlete you've become and the hours of practice and the coaches who have pushed you is a little girl who fell in love with the game and never lost the joy of it." — Mia Hamm