See the ruleset below in the video description.

Since this is not a preview, something may have gone wrong with the code. For diagnostic purposes, this message was produced by calling the die command on line 0, and the last move played was
 
0. 
For general reference, here is the complete list of moves:
If this is your settings file, you may edit it at https://www.chessvariants.com/play/pbm/play.php?game=Symmetric+Chess&settings=sc4c&submit=Edit
Here is a code listing:
   0 die See the ruleset below in the video description.
   1 end
   2