An intriguing puzzle created by George Miller.
It looks just as impossible when the cards are facing out.
George Miller creates puzzles and makes prototypes of puzzles for other puzzle-makers. His design called "Three Card Burr" from 2002 is made of three playing cards that have been cut to allow them to be locked together and displayed in a plastic stand.
Typical burr puzzle
A burr puzzle is a puzzle with at least three pieces intersecting each other at right angles. Burr puzzles are usually made of six pieces of notched wood and locked together to create a shape.
In Mr. Miller’s puzzle, the cards can be assembled without tearing or creasing them, and once they’re put together they cannot be taken apart without destroying them.
– Photo from Puzzle Palace>>
– George Miller’s Puzzle Palace>>
– Photo from Puzzlein>>
– Photo of George Miller at MagicPuzzles>>
– Research site on burr puzzles from IBM>>
– History of burr puzzles (and photo) The Encyclopedia of Science, David Darling>>