GBox Slide and Swap

Rectangular Puzzle Cards (also known as Gem Puzzle, Boss Puzzle, Fifteen Game, Mystery Square) and its variants, including a variant with pictures. The puzzle is a set of identical squares printed with numbers, placed in a rectangular box. One square field in the box remains empty. The object of the game is to arrange the tiles in ascending order by moving them around the box, preferably with as few moves as possible.
The object of the game is to place the tiles in ascending order from left to right and from top to bottom swapping them with empty tiles starting with the number 1 in the upper left corner and ending with an empty tile in the lower right corner of the tile.

The object of the game is to place the tiles in ascending order from left to right and from top to bottom swapping them with empty tiles starting with the number 1 in the upper left corner and ending with an empty tile in the lower right corner of the tile.