15-Puzzle
Permutation Lab
Light
←
→
↑
↓
slide tile into empty
click
tile to move it
Scramble or set a state to begin.
●
Record α
⏪ Play α⁻¹
✗ Clear α
N:
4
△ Scramble
Set state
Cycle Decomposition
ε
Permutation Parity
Even
Empty Box Dist. Parity
Even