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.
3 | 8 | 7 | 1 | |||||
4 | 5 | 7 | 1 | 2 | ||||
1 | 6 | 5 | ||||||
1 | 6 | 4 | 2 | 3 | ||||
2 | 9 | 8 | ||||||
2 | 1 | 7 | 6 | |||||
5 | 3 | 2 | 1 | 6 | ||||
3 | 9 | |||||||
1 | 3 | 9 |
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