PlaySudoku.us
Expert · Puzzle #94
7
4
2
9
3
5
6
3
9
8
1
9
8
7
9
2
5
4
6
3
2
7
1
8
5
6
7
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.