PlaySudoku.us
Medium · Puzzle #431
1
5
7
1
3
5
5
3
6
1
7
3
3
6
8
9
5
8
7
3
1
6
9
1
4
7
5
2
6
1
3
6
7
8
9
2
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