PlaySudoku.us
Evil · Puzzle #970
3
6
7
8
6
1
8
6
5
2
4
9
6
5
7
2
3
9
1
3
2
9
8
5
Techniques used
- Hidden Single
- Naked Triple
- Naked Single
- Hidden Pair
- Pointing Pair
- Box-Line Reduction
- Forcing Chains
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.
A Sudoku grid can be solved using only row and column logic, never needing box constraints — but it becomes exponentially harder.
A Sudoku grid can be solved using only row and column logic, never needing box constraints — but it becomes exponentially harder.