Generator for 6-piece Burr Interlocking Puzzles

*If unsure what to do: print the file set_chinese_cross.stl and try to solve the puzzle.*

The 6-piece Burr interlocking puzzles are made of six (usually wooden) notched sticks that should be reassembled in a threedimensional object where the sticks hold each other in place. Usually only one can be removed which is the start of the disassembling.

A special case is the solid burr puzzle which does not contain any holes in its internal when reassembled. It is known that there exist 314 config