PlaySudoku.us
Medium · Puzzle #448
8
1
5
6
9
2
8
5
1
6
1
4
7
7
3
2
5
4
8
4
9
6
7
3
8
6
5
1
8
7
2
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 average newspaper Sudoku takes about 20 minutes to solve for an experienced solver.
The average newspaper Sudoku takes about 20 minutes to solve for an experienced solver.