thisbeme: "Some games don't end if you can't move, you have to pass! e.g. Lines of Action/backgammon/Ludo"

And if the rules claimed those games used "standard CHESS rules", your point might actually be relevant.

Stalemate is in fact quite common in chess. It's the most common cause of draw with the exception of agreement to draw between the players. There are entire books written on how to cause stalemate and how to avoid it. It's a basic rule of the game.