From the point of view of the system an anonymous user is the same as a registered one. Although it is important that the lifetime of an anonymous user is limited. If an anonymous user isn't using the site for a certain period of time, his/her account is going to be deleted. All user information is either cleaned or impersonalized.

Besides, an anonymous user has less possibilities while using the site. For example, he/she can not create and keep a blog or can not participate in site ratings. Any anonymous user can become a registered user without losing any information regarding his profile.

While playing chess, an anonymous user has the following essential limitations:

1. Closing an applet leads to an automatic loss in a game.
2. In any adjourned game an anonymous user is considered as defeated. If there are adjourned games with an anonymous user as a player means that these games were adjourned by registered users. For example, game Misterx — Guest65231. We can see that it is Misterx's turn to move but he is not considered as defeated because he is a registered user.