It is forbidden to play chess with and without betting...

It is forbidden to play chess with and without betting, if this game is commonly played for betting. If it is played without betting in a certain milieu, for reasons such as intelligence competitions, it is apparently not a problem. It is forbidden to teach or learn any action that is considered as magic, witchcraft, or sorcery except in certain cases, such as preparing to confront wicked magicians and negate their sorcery.

It is forbidden to establish centers for corrupt and sinful actions, such as casinos. It is forbidden to write, publish, distribute, store, and promote vain and misleading books…