An opponent can choose to turn OFF the chat function at the start of a game and quite a few choose to do so.
If this is the case then you will see " Opponent turned off chat" when you start a game.
If you are playing a fast game ..under 10 minutes for the game for example .. a lot of players will not reply to you during the game..depends on the opponent but in general they prefer to think rather than chat.
If you like to chat during a game then i advise playing slow time controls, 15 10 for example and only chat During your OWN time.
EDIT: You have been a member since Jan 2011..Hmm
I am a newcomer in this site and have a question. Can I chat with the opponent during the game?
I have tried to send my messages, but I have not be able to recieve any reply from him or her.
I want to enjoy chatting during the game.
I appreciate if anyone comments on my opinion.