Osdas 4x4 is a sliding-piece puzzle without a frame. Regular sliding piece puzzle, like the classic famous
15 puzzle, have pieces sliding in a frame, such that they do not fall out. The
Boomdas puzzle is a 3x3 sliding puzzle from Japan has no frame, while the pieces still hold together. Boomdas has a cubic sibling called Muto Cube. More info
here,
here and
here. However, one can easily cheat with Boomdas (and Moto Cube) by sliding them apart and putting them back together.
Osdas 4x4 is a frame-less sliding puzzle similar to Boomdas, but with links between the pieces that prevent the puzzle from coming apart. No cheating with this one!
This puzzle has the interesting property that it is possible to swap some adjacent pieces, e.g. 9 and 10, which is not possible with the classic 15-puzzle.
Watch the
YouTube video.
Read at the
Shapeways Forum.
Read more at the
Non-Twisty Puzzles Forum.
Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or
contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.