A slide puzzle 3×3, also known as a 15-puzzle, is a sliding puzzle that consists of a 3×3 grid of square tiles with numbers from 1 to 8 and a blank space. The objective of the puzzle is to slide the tiles to restore the grid to its original order.
Slide puzzles are popular because they are both challenging and addictive. They can be solved by people of all ages and skill levels, and they can be a great way to improve your problem-solving skills.