There are now 6 fully-functional chess boards in the Park scene at 14,106.
User Guide for 3DChess is at
https://docs.google.com/document/d/19Dq8pCZA5BAkqryvxRaMs_Wf8sN7X-h1AF01cECFDuw/
We now have a dedicated Chess page here:
https://dclconf.com/chess