PlaySudoku.us
Hard · Puzzle #194
2
2
7
8
6
4
5
4
6
1
7
6
1
7
5
1
8
6
4
6
5
5
6
9
4
3
2
8
1
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.