Sliding Puzzle· Advanced

Goal

Slide tiles to arrange them from 1 in order. The empty space should end up in the bottom-right corner.

How to Play

  • Tap or swipe a tile adjacent to the empty space to slide it
  • You can also use arrow keys or WASD on keyboard
  • Complete with fewer moves for a higher score

Movement Rules

Only tiles adjacent to the empty space can move. Diagonal moves are not allowed.

3OK
52NG

Completed Example

12345678

Tip

  • Solve the first row first, then work your way down row by row
  • The last two rows should be solved simultaneously for efficiency
  • You have 5 undos available. Use them when you get stuck

The sliding puzzle is an effective cognitive training tool for improving spatial planning and working memory.

  • Klahr, D. & Robinson, M. (1981). Formal assessment of problem-solving and planning processes in preschool children. Cognitive Psychology, 13(1), 113-148.
  • Korf, R. E. (1985). Depth-first iterative-deepening: An optimal admissible tree search. Artificial Intelligence, 27(1), 97-109.