entangledloops/slidingpuzzle

https://github.com/entangledloops/slidingpuzzle/

Each JSON file contains a list of board and solution pairs. These are the optimal solutions as found through Breadth-First Search. For example, here is a random snapshot from inside examples_3x3.json:

...
[[[8, 4, 5], [3, 7, 1], [0, 2, 6]], [2, 7, 3, 8, 4, 3, 8, 2, 7, 8, 1, 5, 3, 1, 2, 4, 1, 2, 5, 6]], 
[[[8, 4, 5], [3, 7, 1], [2, 6, 0]], [6, 7, 3, 8, 4, 3, 8, 2, 7, 8, 1, 5, 3, 1, 2, 4, 1, 2, 5, 6]], 
[[[8, 4, 5], [2, 3, 1], [7, 6, 0]], [6, 7, 2, 8, 4, 3, 8, 2, 7, 8, 1, 5, 3, 1, 2, 4, 1, 2, 5, 6]],
...

The first example represents the following board,

8 4 5
3 7 1
  2 6

where 0 indicates the blank. The solution is to first move the 2, then 7, 3, 8, etc. The final solved board state would be:

1 2 3
4 5 6
7 8

To use the data, it can be parsed:

import json
with open("examples_3x3.json", "rt") as fp:
    db = json.load(fp)

board, solution = db[0]  # inspect first example
print(board, solution)