PlaySudoku.us
Expert · Puzzle #606
7
5
4
6
9
1
7
2
3
8
7
2
4
1
1
6
3
5
2
4
1
6
8
9
Some hospitals use Sudoku as a cognitive exercise for patients recovering from strokes or brain injuries.
Some hospitals use Sudoku as a cognitive exercise for patients recovering from strokes or brain injuries.
When a row, column, and box all intersect, the intersection cell is the most constrained — always check it first.
When a row, column, and box all intersect, the intersection cell is the most constrained — always check it first.