"KReversi" can be played online on any GGZ Gaming Zone site. You can find other players there, and compete against them. Just enter one of the available Reversi rooms with any GGZ core client, such as kggz, and "KReversi" will be offered to you as your favourite game client. If a GGZ core client is installed, you can try out GGZ by visiting the community site.

Remember that when playing online, the opponent might be either a human player or a computer player. The latter one might behave differently from the computer player included in "KReversi".