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