Tetris Unpack was designed by George Miller, while he was at an around-the-world cruise voyage.
Tetris Unpack is an unpacking problem. Whereas most packing problems are difficult to assemble, this one is difficult to disassemble. The first piece slips right out. The next three pieces are quite encouraging, taking only a few moves each to remove. But the fifth piece, oh my! It takes at least 22 moves to take out the fifth piece. Many of those moves require multiple pieces to move together. Also gravity is not your friend. Sometimes, many pieces want to slide down together, whereas you only need to slide a few to make place for another piece. Once the fifth piece is out, everything is downhill from there.
The puzzle took 16½ hours to 3D print on a Dutchy 3D printer. 33 meter of 1.75-mm PLA filament was used to print it. The puzzle weighs 96 grams.
Oskar van Deventer, George Miller, 13 May 2022.
Oskar van Deventer has created many different puzzles including his brand of Oskar Puzzles which are mechanical puzzles and objects that can only exist thanks to 3D printing technology. Since 1978, he has been creating hundreds of mechanical puzzles, making him one of the world's most prolific designers. Several of his innovative designs are commercially available.