Puzzle game

Moves: 0

This is a centuries-old board game. Many variations exist. In this example, the writer created a solitaire version of this game with 9 pieces on a 9 × 9 board. In the beginning of the game, the pieces form a 3 × 3 square in the bottom-left corner of the board. The object of the game is to move all the pieces so they form a 3 × 3 square in the upper-right corner of the board, in the least number of moves.

There are two types of legal moves in this game: