PlaySudoku.us
Easy · Puzzle #597
5
6
4
8
2
2
8
5
3
6
1
1
7
6
4
4
1
7
3
8
2
9
3
4
7
5
8
6
9
7
4
1
6
9
5
3
2
4
9
1
7
6
3
5
4
6
8
9
The longest Sudoku solving session in a competitive setting lasted over 8 hours — an endurance format.
The longest Sudoku solving session in a competitive setting lasted over 8 hours — an endurance format.
The P vs. NP problem — the biggest open question in computer science — would be impacted if Sudoku generalizations could be solved in polynomial time.
The P vs. NP problem — the biggest open question in computer science — would be impacted if Sudoku generalizations could be solved in polynomial time.