How can I finish a game without that I get deducted points? A player has taken two times, for me ilegale movements (perhaps there is a bug in the game). And I have simply no interest to play the game to an end! How do I stop the play?
Sorry for my English.
First, illegal movements are impossible on this site. People often overlook a move that is rarely seen, such as the en passant rule. Whenever an illegal move has been reported to this forum it has always turned out to be a legal one. We cannot comment on a game in progress and I don't know which of your games is involved.
Second, once two moves have been made, rating points will apply, and you will lose some if you resign, whatever the reason.