How are the next tactics chosen for me when I am training?
By default, the next tactic for you is chosen randomly from within a pool of tactics that are within a rating band close to your current rating. As you move up or down in rating your available pool of tactics changes.
However, if you want to concentrate on a specific kind of tactic, you can go into 'learning' mode (unrated tactics) and select what themes you want to focus on:
keywords: tactics choose next problem chosen random