The Slide Fifteen puzzle (called also ‘15 puzzle’) is a very well known puzzle, and it includes 15 wooden squares numbered from 1 to 15 that are placed in a 5x5 try, leaving one position open.
There are hundreds of challenges to be pursued when playing with this puzzle. The basic challenge would be to mix the order of the numbers and by sliding the pieces (picking up pieces is not allowed) try to arrange the numbers from 1 to 15 starting the upper left corner and ending with blank space on the bottom right corner.
However, we have picked many more challenges for you to enjoy your puzzle. Included are 36 challenges for you to crack and enjoy.