PlaySudoku.us
Hard · Puzzle #923
9
1
4
6
1
2
1
5
2
7
9
4
3
8
8
4
5
2
4
8
1
6
6
1
5
1
3
A Sudoku grid is a special case of a Latin square: a 9×9 grid where each symbol appears exactly once in each row and column.
A Sudoku grid is a special case of a Latin square: a 9×9 grid where each symbol appears exactly once in each row and column.
Donald Knuth's "dancing links" algorithm — published in 2000 — is one of the fastest ways to solve Sudoku by computer.
Donald Knuth's "dancing links" algorithm — published in 2000 — is one of the fastest ways to solve Sudoku by computer.