Fifteen

Slide every numbered tile back into sequence.

Slide 14, then 15, into the open space.

Fifteen sample in progress.

How to play Fifteen

Move numbered tiles through one open space until the sequence reads correctly. The sample uses a compact field, while full puzzles expand the search.

On this sample: Tap a tile beside the gap to slide it.

  1. Only a tile directly beside the empty space may move.
  2. Each move slides one numbered tile into the gap.
  3. Finish when the numbers are ordered and the final space is empty.

Rule lineage

The classic 15 puzzle, popularized in the late nineteenth century

Read the documented source