PlaySudoku.us
Hard · Puzzle #920
5
1
9
6
7
1
2
4
9
6
5
2
3
6
9
7
9
7
3
4
7
3
8
5
5
9
1
The brain releases dopamine when it solves a puzzle — the same reward chemical triggered by food and exercise.
The brain releases dopamine when it solves a puzzle — the same reward chemical triggered by food and exercise.
Mathematical researchers have shown that the minimum number of givens (17) applies uniquely to the standard 9×9 format.
Mathematical researchers have shown that the minimum number of givens (17) applies uniquely to the standard 9×9 format.