King Reza:
(1) You must register -> "Registro gratuito" means "Register free"
(2) In red required: Nickname, Clave (password), Repetir clave (confirm password), Sexo (sex)
(3)You must connect -> "Usuario:" (Nickname:) , "Contraseña:" (Password) and click in "Entrar" (Come in)
(4) Click in "Jugar Ajedrez" (Play Chess)
(5) Now, a java applet will open in a new window
(6) You have basically 2 options:
[a]  Take a challenge
Click onto a challenge in the main window. If you put the mouse over one challenge then you´ll see the conditions:
Clasico (classic) -> standard chess
Tuerto (one-eyed) -> dark chess
Comepiezas (EatPieces) -> similar to antichess (there are checks and checkends)
Alocado (rash) -> like FRChess
PasaPiezas (PassPieces) -> Loop Chess
Atomico (Atomic) -> similar to Atomic but with checks
[b] Put a challenge
Click onto button "Desafiar" (Challenge)
Tiempo de la partida (Time per game)
Incremento por jugada (Increase per move)
Quien desconecta pierde QDP (If you disconnect then you´ll lose)
Permitir observadores (Let observers)
Partida con rating (Game for rating)
El servidor elige color (The server chooses the colour)
Quiero jugar con blancas/negras (I want to play with white/black colour)
Sin ordenadores (Without PCs)

Ok?

And in the first window "Cerrar sesión" means Logout