3
7
4
8
9
8
6
1
8
6
7
6
5
1
9
5
1
8
2
3
1
2
4
5
2
7
5
9
6
DifficultyHard
Mistakes0/3
Time00:00
Progress36%

Hard Sudoku — The Real Challenge Begins

Hard Sudoku puzzles have 27-32 clues, demanding careful deduction. You'll need techniques like Obvious Singles and Obvious Pairs to crack them. Typical solve time: 20-35 minutes.

Level up your skills with Obvious Singles and Obvious Pairs.