PlaySudoku.us
Evil · Puzzle #390
2
7
4
9
2
5
1
8
8
4
7
7
1
9
2
7
4
6
6
3
4
8
3
1
2
Techniques used
- Naked Single
- Hidden Single
- Naked Pair
- Pointing Pair
- Finned X-Wing
- UR Type 4
- X-Wing
- XY-Wing
- XY-Chain
"Learning never exhausts the mind." — Leonardo da Vinci
"Learning never exhausts the mind." — Leonardo da Vinci
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.