PlaySudoku.us
Medium · Puzzle #262
8
1
3
4
3
2
6
4
1
9
2
8
1
6
9
4
5
4
9
6
5
8
4
6
7
2
5
1
8
2
3
Nikoli, the Japanese puzzle company that popularized Sudoku, requires all their puzzles to be created by hand — no computers.
Nikoli, the Japanese puzzle company that popularized Sudoku, requires all their puzzles to be created by hand — no computers.
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.