PlaySudoku.us
Medium · Puzzle #547
2
9
6
8
7
1
7
5
1
3
8
2
2
7
9
4
3
2
8
5
1
7
7
6
5
1
3
1
4
9
7
8
1
Retired people who solve puzzles daily have been shown in multiple studies to score higher on memory tests than non-puzzlers of the same age.
Retired people who solve puzzles daily have been shown in multiple studies to score higher on memory tests than non-puzzlers of the same age.
"An expert is someone who has made all the mistakes which can be made in a very narrow field." — Niels Bohr
"An expert is someone who has made all the mistakes which can be made in a very narrow field." — Niels Bohr