PlaySudoku.us
Expert · Puzzle #751
5
9
8
6
7
3
8
7
6
7
4
8
7
3
1
2
9
3
6
5
8
3
7
2
4
2
3
"It is impossible to be a mathematician without being a poet in soul." — Sofia Kovalevskaya
"It is impossible to be a mathematician without being a poet in soul." — Sofia Kovalevskaya
In 2013, researchers proved computationally that every valid 16-clue Sudoku puzzle has a non-unique solution — 17 is truly the minimum.
In 2013, researchers proved computationally that every valid 16-clue Sudoku puzzle has a non-unique solution — 17 is truly the minimum.