PlaySudoku.us
Expert · Puzzle #248
8
5
2
6
4
2
3
7
9
9
7
4
5
4
6
8
6
3
4
9
6
2
8
9
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.
Research shows that solving logic puzzles improves spatial reasoning — the same cognitive skill used by architects and engineers.
Research shows that solving logic puzzles improves spatial reasoning — the same cognitive skill used by architects and engineers.