PlaySudoku.us
Evil · Puzzle #177
7
3
4
5
8
8
4
1
6
1
3
8
2
1
5
8
6
2
1
4
3
4
5
8
9
Techniques used
- Hidden Single
- Pointing Pair
- Pointing Triple
- Box-Line Reduction
- Forcing Chains
- Naked Single
- XY-Wing
"If you wish to make an apple pie from scratch, you must first invent the universe." — Carl Sagan
"If you wish to make an apple pie from scratch, you must first invent the universe." — Carl Sagan
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.