Dueling Network is an Online Yugioh Trading Card Games that commonly being played by many duelist. This site provide all card both TCG/OCG that player can use on deck building. Even though the system can still be considerate as manually played (this site is not even related with konami) player can still enjoy playing games just like people do while playing face to face.
So what if we can't agree on our opponent method or move? We didn't really need to worry about that, there is an option to ask people on public chat or even call the admin to act as mediator on the advanced (rated) duelist pool. The games it's self divided into 3 category they are advanced (rated) , advanced (unrated) and traditional (unrated). Rated games will directly influence your profile on the Dueling Network to calculate your rating and experience as duelist in this games.
Overall, Dueling Network is a place where you can find another Yugioh duelist (and really-really many of them! you can find in this place) on the world and playing it online. This is a really good place to test a new deck, and looking for a new idea to build your own new deck.
external link: http://duelingnetwork.com