Problem

Solve the 15-Puzzle starting from the given initial state. The final state is [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0]

File structure

.
├── Code
|  ├── NumberPuzzle.ipynb     
|  ├── NumberPuzzle.py  
├── Results
|  ├── test1
|  ├── test2
|  ├── test3
|  ├── test4
|  ├── test5
├── README.md

How to run code

• Change the directory to the root location
• Run the following command:
  python3 Code/NumberPuzzle.py --PuzzleNumber 4 --InitState 1 6 2 3 9 5 7 4 0 10 11 8 13 14 15 12 --SaveFolderName ./Results/test5/

Parameters

• PuzzleNumber: The size of the puzzle. Here, it is 4. But the code is generalized for any number of grids. Though, the tesing has been done only for size 3 and 4.
• InitState: Inital state for the puzzle
• SaveFolderName: folder path where you want to save the output .txt files

Results

The folders corresponding to test cases have been created. Each folder has

• moves.txt: Describes the moves from start till end: eg. left, right
• path.txt: List of puzzle state from start till end. Only the nodes on the path
• parent_child_nodes.txt: this has three columns, parent node state, current node state, child node state