Not sure what you mean by blocked ... but you can close your account via the information in the following link:
https://support.chess.com/customer/portal/articles/1444763-how-do-i-close-delete-my-account-
That said, you reall are not supposed to do that to just open up another one.
how to completely delete my account? when i want to login its says acount has been blocked.. how to delete all the data and regeister again?
already 5 message send in https://support.chess.com/customer/portal/emails/new but no reply... please help me guys...