Stomachion

World oldest known puzzle, designed by <b> Archimedes</b> 
The games has <b> 14 pieces </b> 
There are total <b> 536 </b> ways to re-arrange but to find even one is really hard. 
Another form of play to which classical texts attest is the creation of different objects, animals, plants etc. by rearranging the pieces: an elephant, a tree, a barking dog, a ship, a sword, a tower etc</br> 
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</br><b><u>How to Play</u></b><iframe width="560" height="315" src="https://www.youtube.com/embed/IGmd9DTub-Y" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>