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
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