PlaySudoku.us
Hard · Puzzle #613
3
1
7
3
5
6
3
4
3
1
2
9
6
8
5
6
1
9
8
5
9
1
7
5
4
1
4
1
3
9
Try a puzzle two difficulty levels above your usual. Struggle is how expertise grows.
Try a puzzle two difficulty levels above your usual. Struggle is how expertise grows.
On average, a hard Sudoku requires 50–100 candidate eliminations before the grid is fully solved.
On average, a hard Sudoku requires 50–100 candidate eliminations before the grid is fully solved.