Did You Know?

The brain releases dopamine when it solves a puzzle — the same reward chemical triggered by food and exercise.

Did You Know?

The brain releases dopamine when it solves a puzzle — the same reward chemical triggered by food and exercise.

PlaySudoku.us
Medium · Puzzle #666
✓ Completed! 👍
1
9
7
2
6
9
3
7
8
2
5
9
3
9
1
7
3
4
4
5
4
6
2
8
4
7
3
2
9
2
4
9
7
1
00:00
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Sudoku Trivia

Retired architect Howard Garns, who invented the modern Sudoku, never knew it became a global phenomenon — he died in 1989.

Sudoku Trivia

Retired architect Howard Garns, who invented the modern Sudoku, never knew it became a global phenomenon — he died in 1989.