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~ You are entering a Burr Zone ~

Be advised that the following pics are those of puzzles meant only for the serious puzzler

Normal folk may tend to go stir-crazy !

'High-Level' means that there are multiple shifts involved before a single piece can be removed

It must be said here that all my solutions that you can link to from this page have been created using the PuzzleSolver 3D program that was created by André van Kammen. Unfortunately his program is no longer available to the public.

However, there is another much more versatile program called  BurrTools  by Andreas Röver, which is free to download.

Clarissa Burr . . . . . a high-level rating of 11
This is the first in a series of what I like to call 'tortuous burrs' .   Original design by Ronald Kint-Bruynseels .  This is probably a difficulty rating of 7 on the Puzzle Difficulty Index from 1 to 10, in relation to others like it .
This unique gem is an awesome 6" cube !   An enormous handfull, to say the least .

According to a statement regarding the solution on Ishino Keiichiro's page displaying the puzzle, "There are 170 solutions include apparent. 1 solution is constructable . 11 moves to remove the first piece . "

Sheffield Steel 6BB

This humungous 6-pc specimen measures 7" (if it were in cube form) and weighs about 2 pounds .   It is made of North American white pine -- at 8% kiln-dried humidity -- and given a two-toned application of MINWAX stain (combination of Red Oak and Natural), and then several coats of acrylic polyurethane on certain areas that will not be affected during the move shifts .

The man responsible for this wonderfully devilish design is Ronald Kint-Bruynseels .

According to a statement regarding the solution on Ishino Keiichiro's page displaying the puzzle, "There are 144 solutions include apparent. 1 solution is constructable . 17 moves to remove the first piece . 14 moves next ."

To not become unbearingly overwhelmed with the enormity of the number of shifts involved, I enlisted the aid of one awesome program called Puzzlesolver 3D created by André van Kammen at "http://www.puzzle.cx/" (now defunct) .

According to André, "Puzzlesolver 3D is a program for solving 3D interlocking puzzles.   It makes it possible to show the found solutions as an animation which can be viewed from every angle.   It supports assembling and disassembling for puzzles which are built up using cubic blocks.   For example, it solves most 6 piece burrs by the click of a button.   It has an easy to use 3D interface for drawing the puzzle. "

You can view my very detailed version of the solution (by PuzzleSolver3D)  here

No Nukes!   . . . . . the Titan Beast
This impressively, intimidating design, the forerunner to the Sheffield Steel 6BB above, is credited to Ronald Kint-Bruynseels, and demands a high degree of respect and awe, even from the most serious of puzzlers .   The 'core' pieces are slightly similar to the Sheffield Steel 6BB .   To assemble just the 'core' required only eight moves .   Once the extensions were added, the number of shifts increased dramatically .

This is by far the most frustrating puzzle I have made, and have put together -- even with the 44 move solution, which was created -- as well as those high-level burrs above -- by PuzzleSolver3D .

The extensions are 10 1/4" by 1 7/16", acquired from 3/4" North American white pine finished 1x4 stock .

Weighing in at 2.02 pounds, it is extremely snug .   After inserting the sixth piece, from then on to the finish, it was very difficult shifting the pieces, no matter which ones they were .   Hard to get one's fingers in between the extensions to grab hold of the piece's core structure, and use both hands -- applying equal pressure -- to make the shifts .

Not only have I given the extensions a two-tone stain effect with four coats of acrylic polyurethane, but I have also created line cuts for added distinction aesthetics .

. . . . . size comparison

This gives you a great perspective as to the mammoth scale of this gargantuan . . . a size akin to some of Vaclav Obsivac's puzzles from the Czech Republic .

I have meticulously created a solution page, with the aid of PuzzleSolver 3D .   You can easily follow each step, as the pieces are all differently colored and numbered, and most of the steps (all enclosed within a frame) have two illustrations: the left one representing the puzzle having been turned in orientation from the last step previous, the right one showing the move .

You can view that page  here

Squarrel   . . . . . a Squirrel's Dilemma
Another 'tortuous burr' modeled after Ronald Kint-Bruynseels' original .   According to Ishino Keiichiro's website, "There are 12 solutions include apparent. 1 solution is constructable. 10 moves to remove the first piece. "

You are looking at the first 3 shifts out of 10

You can view my very detailed version of the solution (by PuzzleSolver3D)  here

Bill's Baffling Burr . . . . . a high-level rating of 4.2
A very tough burr which takes four slides to remove the first piece ( the actual removal being the 5th move ) .   Another two slides to remove the second piece .   A detailed source of information about this puzzle can be seen at John Rausch's website Puzzle World, with a special section given to renowned interlocking Ap-Art Puzzles craftsman/designer Stewart Coffin and his section titled  The Puzzling World of Polyhedral Dissections

. . . . . pieces
A very detailed version of the solution can be found  here

L Board Burr . . . . . a high-level rating of 22.3
L Board Burr is a design from the world famous puzzle designer Frans de Vreugd of The Netherlands. This puzzle is composed of 6 pieces that feature an "L" shape.   22 shifting moves are required to release the first piece, another 3 shifts for the second piece, and yet another 3 shifts for the third piece.   This is an extremely tricky and very difficult burr .

. . . pieces
19 copies of this puzzle were crafted by Steve Strickland of  Puzzlecraft  , for the International Puzzle Design Competition in Chicago earlier this year.   These were made with Maple, Bubinga and Brown Ebony.   The plates are 3/8" thick and the assembled puzzle is 2.5" wide.   This puzzle is one of these first edition copies.

17 puzzles were sold privately to collectors and only 2 copies remain, this being one of them .   Another 14 copies were later made in Maple and Black Walnut that sold for $32 each.

Dovetail Burr . . . . . a high-level rating of 6
Designed by Frans de Vreugd (Netherlands) .   According to the description from  Puzzle World  , "This puzzle is based on the Six-Board Burr by Junichi Yananose.   The dovetails reduce the number of possible moves dramatically.   The solution is a unique level six (six moves to remove the first piece)" .

The first 120 copies of the Doveltail burr from Frans de Vreugd were made by Bernhard Schweitzer -- a German puzzle collector/craftsman for more than ten years, with membership in the IPP (International Puzzle Party), a private, informal organization whose main objective is to promote and recognize innovative new designs of mechanical puzzles from around the world -- for his exchange puzzle ( made from Maple + Padauk wood) .

The model pictured above -- copied and fabricated from the original version by anonymous craftsmen -- was purchased from  Bits & Pieces  online catalog .

The Dovetail Burr solution can be found  here  .

Gordian's Knot . . . (a.k.a   'Extreme Torture') . . . a high-level rating of 28.21
This is a new product by the  ThinkFun people  (formerly Binary Arts - 1985) -- purchased from the good folks at  PuzzleMeThis  .   It is taken from Frans de Vreugd's version called  'Extreme Torture'  .

According to Ishino Keiichiro's page depicting this extremely frustrating computer-generated assault on the mind, "There are 10,752 solutions include apparent. 6 solutions are constructable. Max 28 moves to remove the first piece, 21 moves to remove the next piece."

There are a total of 69 moves in all !
This solution can be found  here  .

An easier solution of only 18 moves can be found  here  .

     note:   a program called Puzzlesolver 3D created by André van Kammen at "http://www.puzzle.cx/" (now defunct) has made it  
     possible to solve several solutions for this puzzle -- as with several of the other puzzles mentioned above -- the  
  minimum being 18, and the maximum at 69 .   As sold, the puzzle comes with the 69-step solution;  
    but you now have the option of the easier one to work with .

. . . . . first three moves in a grueling succession -- one does not want to be caught forgetting where one is throughout the solution :   the experience of trying to find your way back can be every bit as harrowing as trying to continue forward .

One definitely needs to have the solution in view, and to follow it religiously until the end, or else near-total madness might rear its ugly head .

. . . . . pieces

The history to Extreme Torture can be viewed  here