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
"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.