ContentsThe Adaptive Tactics Server learns from the results of positions it presents you with. From your successes and failures against those positions, it gathers statistics that allow it to serve more problems (again statistically speaking) in categories you are weakest in.
To get started, you need to register (documentation).
Then you have to log in. Once you are logged in, follow the links to "solve problems" or whatever else strikes your fancy.
If you are a new user, you'll want to either solve problems or view problems and solutions. As you gain experience with the site, you'll be able to take on additional responsibilities if you want to, like sharing problems of your own with us, categorizing problems, and approving problems.
Below is a list of help topics. Feel free to nose around.