PlaySudoku.us
Medium · Puzzle #389
6
9
4
1
8
7
2
4
8
5
2
5
6
3
1
4
8
6
7
5
1
2
4
8
4
1
9
7
2
7
8
3
2
9
7
8
1
"Candidates must be mentally prepared for every new game as if it were the last." — Mikhail Botvinnik
"Candidates must be mentally prepared for every new game as if it were the last." — Mikhail Botvinnik
Check columns before rows — columns are often harder to complete and contain more useful constraints.
Check columns before rows — columns are often harder to complete and contain more useful constraints.