Devil's Friend Burr - Wooden Puzzle Brain Teaser Review
This interlocking Burr wooden Puzzle consists of twelve identical notched rods. Once the pieces are disassembled you will see why it is called Devil's Friend. It is a very difficult puzzle requiring advanced burr puzzle solving methods. The puzzle was created in 1890 by the Austrian-German William Altekruse who even registered a US Patent (#430502). This puzzle is not quite symmetrical visually because the asymmetrical notchs arrangement reveal themselves. Read more...
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