Tactics Fight
Here you are in a match over 12 easy positions against another user. The first one to solve a position gets one point. If a wrong solution is entered the opponent gets one point. If nobody moves within 60 seconds the next position appears.
You can find the positions from your fights in mygames.chessbase.com, i.e. under My games.
In addition you have the option to watch other players having a fight or to challenge a player directly.
Then it is simply about who can solve the position first. For tactics fights too there is a ranking list, which you can access with a click.