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