Fifteen - logical game

Křížovkářský Ráj

About this game

The challenge is to move the numbers so that a fewest number of moves organizes the numbers from one to fifteen, the one must be in the left square of the upper row. In each turn you move a number to the adjacent empty field, either from left to right, right to left, top to bottom, or bottom to top, not diagonally. The last box remains empty at the end of the game.