PlaySudoku.us
Expert · Puzzle #132
8
6
9
7
2
4
7
1
6
9
3
2
5
7
3
1
2
9
5
6
3
1
7
4
6
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.