8puzzle

これは単純なパズルゲームです、最も少ない手順で問題を解決しよう！

The 8 number puzzle is a simple game which consists of eight sliding tiles, numbered by digits from 1 to 8, placed in a 3x3 squared board of nine cells. One of the cells is always empty, and any adjacent (horizontally and vertically) tile can be moved into the empty cell. The objective of configuration and end up in a configuration which the tiles are placed in ascending number order and the empty cell is in the right bottom of board.

We provide more than 400 levels, 3 difficulties. Try to solve the problem with fewest steps!