gosudoku is a command line util to generate sudoku puzzle, solve sudoku or both
$ go get github.com/bhaskarsaraogi/gosudoku/cmd/gosudoku
$ gosudoku -generate
9 6 0 1 0 0 5 7 8
0 5 0 3 7 9 0 0 6
0 7 2 0 0 8 9 1 3
0 0 0 0 0 3 8 5 0
2 9 0 8 0 7 0 0 0
1 0 8 9 0 0 0 0 0
3 8 4 0 0 5 1 0 0
0 0 6 4 8 0 3 0 0
5 2 0 6 0 1 0 8 0
$ gosudoku -solve
Please enter the sudoku(enter 0 for unassigned location):
4 9 2 5 1 3 7 0 6
0 0 0 2 0 8 3 0 1
8 0 0 7 0 0 0 2 0
0 0 5 0 6 0 0 3 0
0 7 8 3 0 0 0 0 0
3 6 9 0 8 7 5 1 2
0 0 4 9 0 0 0 0 0
0 3 0 8 0 1 6 0 0
9 8 0 6 7 4 0 5 0
SOLUTION:
4 9 2 5 1 3 7 8 6
7 5 6 2 4 8 3 9 1
8 1 3 7 9 6 4 2 5
2 4 5 1 6 9 8 3 7
1 7 8 3 5 2 9 6 4
3 6 9 4 8 7 5 1 2
6 2 4 9 3 5 1 7 8
5 3 7 8 2 1 6 4 9
9 8 1 6 7 4 2 5 3
$ gosudoku -both
7 0 0 0 0 5 9 0 8
2 1 9 3 4 0 0 7 0
8 5 0 0 0 0 2 3 1
0 0 0 5 1 3 7 0 9
5 0 0 8 7 4 3 0 6
0 0 8 6 0 0 0 5 0
0 0 2 0 0 0 0 0 0
6 8 5 2 3 1 0 9 0
0 3 0 4 0 0 8 1 0
Enter any key to get solution
7 6 3 1 2 5 9 4 8
2 1 9 3 4 8 6 7 5
8 5 4 7 6 9 2 3 1
4 2 6 5 1 3 7 8 9
5 9 1 8 7 4 3 2 6
3 7 8 6 9 2 1 5 4
1 4 2 9 8 7 5 6 3
6 8 5 2 3 1 4 9 7
9 3 7 4 5 6 8 1 2