PlaySudoku.us
Evil · Puzzle #667
5
8
1
8
3
6
7
5
1
7
9
9
2
3
2
5
3
4
6
4
8
9
6
Techniques used
- Naked Single
- Hidden Single
- Pointing Pair
- Box-Line Reduction
- 2-String Kite
- XY-Chain
- Naked Pair
- Forcing Chains
The longest Sudoku solving session in a competitive setting lasted over 8 hours — an endurance format.
The longest Sudoku solving session in a competitive setting lasted over 8 hours — an endurance format.
"The more you know, the more you know you don't know." — Aristotle
"The more you know, the more you know you don't know." — Aristotle