A fool-proof guide to solving every solvable sliding block puzzle, ever. - Sliding-Block Puzzles - Giant Bomb
Sliding Block Puzzles, Part 3 | Random(Blog)
Fifteen Puzzle Optimal Solver
How to solve ANY slide puzzle regardless of its size – Kaplof
How to check if an instance of 15 puzzle is solvable? - GeeksforGeeks
GitHub - alexyuisingwu/sliding-puzzle-solver: A web app that allows users to create, play, generate and visualize optimal solutions for sliding puzzles with custom images and dimensions.
Chapter 12 - Sliding-Tile Solver
CS61C Fall 2014 Project 2
How to solve ANY slide puzzle regardless of its size – Kaplof