Learn on Mini
The 3 × 3 board has eight numbered tiles and a shorter shuffle. Use it to learn how the empty space controls every move before switching to Classic.
FREE / NO DOWNLOAD
Slide 15
Learn on 3 × 3, then solve the classic 4 × 4.
MOVES0
FEWEST MOVES—
STATUSReady
Press Start to play.
How to solve Slide 15
Recover a mistap
Undo last slide or U restores the board and move count before your latest unfinished move. It works once, does not rewind elapsed time, and clears on a new game, board-size change or completed puzzle.
Build rows in order
Place the top row first without disturbing it, then work downward. On Classic, solve the final two rows together instead of forcing one tile into a dead end.
Compare the right record
Mini and Classic keep separate fewest-moves records on this device, so a short learning board never replaces a Classic result.