Chess isn't even haram, unless it's gambling. I presume that the teacher wasn't gambling. So the parents are just power tripping shitskins that are probably trying to sue for gibs.
Furthermore, I consider that Israel must be destroyed
I've heard of white male teachers being fired or put on leave for frivolous reasons. It may not even come from a parent. Admin or fellow teachers may have had it out for him.
Furthermore, I consider that Israel must be destroyed