PlaySudoku.us
Easy · Puzzle #543
1
6
4
7
3
4
5
7
2
6
3
5
1
2
9
8
9
6
5
2
4
8
6
7
9
7
9
5
2
3
8
4
1
3
8
4
7
7
8
9
3
5
4
1
5
6
1
9
8
"The first principle is that you must not fool yourself — and you are the easiest person to fool." — Richard Feynman
"The first principle is that you must not fool yourself — and you are the easiest person to fool." — Richard Feynman
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.