PlaySudoku.us
Medium · Puzzle #661
4
3
1
7
9
7
5
4
1
4
8
3
5
7
6
9
8
3
8
6
7
4
1
2
8
6
1
5
8
9
4
2
7
3
5
6
8
"Chess is the art of analysis." — Mikhail Botvinnik
"Chess is the art of analysis." — Mikhail Botvinnik
Puzzle difficulty in Sudoku is not just about the number of givens — the pattern of which cells are given matters just as much.
Puzzle difficulty in Sudoku is not just about the number of givens — the pattern of which cells are given matters just as much.