PlaySudoku.us
Hard · Puzzle #421
4
6
9
3
7
2
9
8
5
2
7
8
4
2
1
3
4
8
5
9
6
9
6
3
4
7
9
7
5
4
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 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.