The Bulbous Blob Puzzle is a great variation on standard sliding block puzzles. The puzzle was designed by Oskar van Deventer and James Stephens. In a traditional sliding block puzzle you move square blocks around the board in order to get them into a particular configuration or to get a specified block off of the board. The the Bulbous Blob Puzzle, you’re no longer dealing with squares, you’re dealing with, well… bulbous blobs. It’s a nice twist and very challenging. There’s a flash implementation at the site linked above.
Found through Natural Blogarithms.
