Thank you Antje for your help.It will described the two possiblities to play chess (or other games)in the internet (My impression is that to play chess in the internet and special at a chessserver is not prevalent in my (only?) country):
1."real-time",an good example is USCL, or 2."turn-based" with Brainking as an example,where you can play chess and chessvariants too.
In the second part there will described the "Three Checks Chess" as an nice chessvariant with some games (The most chessplayers know only the standard chess and not the varants).Perhaps I will continue to describe the other variants too..