PlaySudoku.us
Hard · Puzzle #544
2
6
1
4
5
1
6
3
2
1
8
4
5
2
4
7
8
4
7
9
9
3
4
9
6
4
5
9
2
7
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.
"In the confrontation between the stream and the rock, the stream always wins — not through strength, but through persistence." — Buddha
"In the confrontation between the stream and the rock, the stream always wins — not through strength, but through persistence." — Buddha