Played this back in the70's (55 years ago) for hrs.. my uncle showed how to solve it but like I said many years have passed.. I found a picture of the 14 pieces and made it in fusion 360.. also added a case to store the pieces in..
The story behind this puzzle was in ancient prisons if you solved it you were released from prison.. I tried to find that info but couldn't fine it.. I didn't add the solution in this file, wanted you the try to solve it first.. If you need it I can send it to you my e-mail is rj3dprint@gmail.com...
Hope you enjoy the challenge