PlaySudoku.us
Hard · Puzzle #538
6
9
3
1
2
8
4
5
6
1
7
5
6
2
5
2
9
6
9
7
5
9
5
6
2
4
5
3
6
1
At peak Sudoku popularity in 2006, over 600 different Sudoku books were published in a single year.
At peak Sudoku popularity in 2006, over 600 different Sudoku books were published in a single year.
"It's not whether you get knocked down, it's whether you get up." — Vince Lombardi
"It's not whether you get knocked down, it's whether you get up." — Vince Lombardi