PlaySudoku.us
Medium · Puzzle #229
3
2
1
7
8
4
9
4
9
6
4
1
8
6
2
9
6
8
9
4
5
1
7
8
4
2
3
3
9
6
5
4
4
8
6
Start fresh if you've been staring at the same cells too long. Distance creates clarity.
Start fresh if you've been staring at the same cells too long. Distance creates clarity.
In 2013, researchers proved computationally that every valid 16-clue Sudoku puzzle has a non-unique solution — 17 is truly the minimum.
In 2013, researchers proved computationally that every valid 16-clue Sudoku puzzle has a non-unique solution — 17 is truly the minimum.