PlaySudoku.us
Evil · Puzzle #9
6
8
9
5
9
2
3
8
7
4
3
8
9
1
3
6
1
2
4
3
9
6
2
9
7
Techniques used
- Naked Single
- Hidden Single
- Pointing Pair
- Box-Line Reduction
- Naked Quad
- Naked Pair
- XY-Chain
- Forcing Chains
- XY-Wing
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.
Box-Line Reduction: if all candidates for a digit in a row or column are within one box, eliminate that digit from the rest of the box.
Box-Line Reduction: if all candidates for a digit in a row or column are within one box, eliminate that digit from the rest of the box.