PlaySudoku.us
Expert · Puzzle #308
1
8
3
2
1
6
8
6
5
4
7
9
4
7
1
7
4
8
9
5
8
3
7
2
9
"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.