PlaySudoku.us
Medium · Puzzle #990
2
8
3
3
8
6
1
7
4
2
9
5
9
8
4
6
9
4
1
6
6
8
7
3
1
5
7
6
8
4
2
9
3
2
5
6
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