Dude, that would make it 500 years old at most

right on heinzie.  

Which shape is which piece? 

Exactly.

This is more devilish than we first expected.  I tried to plug it into Fritz, but there was no way to put a mushroom on h2.

Was it found under the shroud at Turin ?  Or was there a chinese take- away nearby.

Sorry I meant 500 years old.

I believe this is the position, with white pieces on the right hand side (in the manuscript). Mr. da Vinci expected the reader to find a mate in three moves.

Should there not also be a black pawn on b5?

 Thanks, corrected!

Apparently someone has already made a chess set based on these pieces (leonardochess.com).  But it's only for the very rich.  Like, 800 Euros.