PlaySudoku.us
Medium · Puzzle #748
1
5
2
6
2
6
4
9
7
9
8
2
8
1
3
2
7
4
5
9
4
9
2
8
7
9
4
5
1
3
2
8
4
1
6
The world record for solving an easy Sudoku is under 1.4 seconds, set in competitive speed-solving.
The world record for solving an easy Sudoku is under 1.4 seconds, set in competitive speed-solving.
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.