Nothing potentially obscene or disturbing is allowed.
Nothing potentially illegal. Nothing that could potentially cause harm to readers.
Nothing that could potentially mislead or manipulate readers.
No reprinting of copyrighted material that you do not own or have permission to post. This includes text, images, and games with annotations.
There are no specifically prohibited subjects as long as they do not violate the above rules. Tags must be applied accurately to blogs, reflecting what appears in the article. If your article isn't about chess variants, don't tag it as "chess variants."