Other Permuatation Puzzles

Sliding Tiles in 3D

These puzzles (except the right-hand pen below), all have an empty space in which to move a tile. In this way they actually form three-dimensional versions of the sliding tile puzzles.

Puzzle Pens The Missing Link Whip-it!
For the puzzler who has everything. At last, we have found it! ... and whip it good!