Did You Know?

The world record for solving an easy Sudoku is under 1.4 seconds, set in competitive speed-solving.

Did You Know?
✓ Completed! 👍
4
8
1
2
9
2
3
7
7
5
8
6
5
2
8
7
7
1
4
8
6
2
2
6
1
5
1
9
5
4
3
1
9
5
3
8
Math Insight

The pigeonhole principle explains why 8 clues are never enough to guarantee a unique Sudoku solution.

Math Insight