PlaySudoku.us
Expert · Puzzle #845
1
3
2
4
5
7
8
1
2
2
8
5
9
1
3
7
9
3
7
7
4
1
9
6
Techniques used
- Hidden Single
- Naked Pair
- Pointing Pair
- Naked Single
- Naked Triple
- Skyscraper
- XY-Chain
- XY-Wing
"Absence of evidence is not evidence of absence." — Carl Sagan
"Absence of evidence is not evidence of absence." — Carl Sagan
"In mathematics the art of asking questions is more valuable than solving problems." — Georg Cantor
"In mathematics the art of asking questions is more valuable than solving problems." — Georg Cantor