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I found this old puzzle and have no idea how to get it together. I have been trying to complete it for several hours now but to no avail. The pieces of the puzzle are as follows:

Piece 1Piece 2Piece 3Piece 4Piece 5Piece 6

Also sorry if it has incorrect tag, correct me if needed, I couldn’t find any appropriate.

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  • $\begingroup$ Do you know what it's supposed to look like when assembled? $\endgroup$ – F1Krazy Jan 31 '18 at 13:15
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    $\begingroup$ @F1Krazy it is supposed to be a 3D plus sign. $\endgroup$ – Michal Krejčí Jan 31 '18 at 15:14
  • $\begingroup$ Are the dark brown things a fixed part of the pieces? Because they look like they give away a bit of a hint. $\endgroup$ – ilkkachu Feb 6 '18 at 18:44
  • $\begingroup$ @ilkkachu no, they are glued on solid... $\endgroup$ – Michal Krejčí Feb 6 '18 at 20:06
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Pieces 1 to 6 The pieces from 1 to 6 as shown in the question.


Put together the pieces P2 and P6 enter image description here


Add piece P5 enter image description here


Next is piece P4 enter image description here


Next is piece P3 enter image description here


Now you have to do some moves. At first the pieces P3 + P6enter image description here Now move piece P5 enter image description here and piece P4

Now you can add the last piece P1 enter image description here


To move P1, P4, P5 and P6 gets you to the solution. enter image description here

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  • $\begingroup$ I wish I could upvote twice, perfect answer $\endgroup$ – Saeïdryl Feb 6 '18 at 14:29
  • $\begingroup$ man thank you! I will try this tommorow, I don't have the puzzle with me now. But that looks amazing! Is there like some program for modelling those thing or is it just some 3D modelling CAD thing? $\endgroup$ – Michal Krejčí Feb 6 '18 at 20:05
  • $\begingroup$ This is pretty much the same answer as I gave, just a slight variation in the order in which you assemble the pieces. $\endgroup$ – Jaap Scherphuis Feb 7 '18 at 5:16
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I think it is a 6-Pieces Burr Puzzle.

enter image description here

If you want to get the solution:

Visit this link: http://www.mathematische-basteleien.de/devilsknot.htm

Hope one of them will fit your puzzle!

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  • $\begingroup$ Thank you for your reply. None of the solutions in the link provided, however, wasn’t for my puzzle... But thanks anyway! $\endgroup$ – Michal Krejčí Feb 3 '18 at 12:12
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I don't own the same puzzle as you, but I have a Burr puzzle set that is close. I am not completely sure if the solution I describe here will work on your puzzle.

I'll number the pieces #1 to #6 in the order you showed them in your question.

Combine pieces #4 and #6 to make rectangular ring. One end of the ring opening has a notch. Insert #5 into that ring so that it enters that notch.

enter image description here

Place #2 on one side of the ring, perpendicular to all the other pieces.

enter image description here

Piece #3 goes on the other side of the ring, to pair up with #2.

(Note, in the picture my thumb covers the piece a bit because I don't actually have a piece that matches your #3.)

enter image description here

The last piece, #1, cannot be put in place directly. The other pieces need to be slid about a bit to allow it to be inserted.

First slide #6 lengthwise, which disengages the notch from #5.

enter image description here

Now slide #5 up. This then allows #4 to move lengthways in the opposite direction that #6 went.

enter image description here

Pieces #4 and #6 have slid far enough apart that their ring is broken. This gives enough room to insert #1 inside the ring. Lastly, slide pieces #6, #5 and #4 back, and the puzzle should be solved (if I am visualising this correctly).

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