Difficulty and solvability is totally random as I randomly left a certain number of hints from a full-filled board.
In this demo, backtracking algorithm is used for generating the sudoku. Difficulty and solvability is totally random as I randomly left a certain number of hints from a full-filled board.
7 | 8 | 9 | ||||||
8 | 1 | 7 | 3 | |||||
4 | 1 | 7 | 9 | |||||
8 | 9 | 7 | 6 | 2 | ||||
5 | 8 | 9 | ||||||
1 | 8 | 7 | ||||||
6 | 9 | 3 | 7 | |||||
5 | 3 | 2 | 6 | |||||
1 | 6 | 9 | 8 |
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