|What is the Burr Puzzle?
The burr puzzle is a 3-dimensional
The simpliest one has two
pieces in form of a C and one piece in form of an O.
You have to fit them together, so that you have a "knot".
of Six Pieces
The standard burr has 6 pieces.
Puzzle with an Empty Space top
The following six-pieces burr puzzle is simpler. But
it has one "mistake": There is an empty space inside.
of the Burr Puzzle top
||If you would like to make the knot with three pieces
you need three blocks of wood with the measurements 8cm x 6cm x 2cm. The
holes in the middle have the measurements 6cm x 2cm x 2cm.
The drawing on the left with the cubelets will
||You need 6 blocks of wood 6cm x 2cm x 2cm for the knot
with six pieces.
of the 6-piece Burr Puzzle top
Result: 104 cubelets form the burr.
The burr puzzle is built of cubelets. You have to count
(1) Pieter van Delft /Jack Botermans: Denkspiele der
Welt, München 1980 (1998 neu aufgelegt)
(2) Computer-Kurzweil, Spektrum der Wissenschaft, Dezember
(3) Jerry Slocum/Jack Botermans: Geduldsspiele der Welt,
Augsburg 2005 [ISBN 3-8289-4949-5]
on the Internet top
Piece Burr, Burrs
Bill Cutler Puzzles, Inc.
Rob's Puzzle Page
Stewart T. Coffin
(and Smaller) Burrs
Sue & Brian Young
Mr Puzzle Australia
piece burr puzzle (12 identical pieces)
The American puzzle designer Bill Cutler found out with
the help of a computer, that you can build the burr puzzles with a stock
of 25 pieces in 341 ways (2).
The Dutch professor J.H. de Broer has systematically designed
500 pieces 6x2x2 and put them together as a burr. He found 69 versions
of this take apart puzzle (1).
Then mathematicians found with the help of a computer,
that you can build burr puzzles with a stock of 369 pieces in 119 979 ways
Feedback: Email address on my main page
page is also available in German.
1999 Jürgen Köller