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