PlaySudoku.us
Easy · Puzzle #606
6
3
9
2
7
5
5
9
6
8
7
3
5
1
2
3
1
1
7
8
5
2
4
9
6
9
2
4
1
8
5
7
2
4
1
9
5
5
8
2
3
1
8
3
1
9
5
4
Sudoku is listed as a recommended mental exercise in several cognitive rehabilitation programs for TBI (traumatic brain injury) patients.
Sudoku is listed as a recommended mental exercise in several cognitive rehabilitation programs for TBI (traumatic brain injury) patients.
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.