These hands are very "difficult" in the sense that most people will get them wrong. The correct approach is fairly simple to learn. These particular hands are very illustrative of the main themes. Don't be discouraged if you get them all wrong, the ideas will stick with you.
Declarer Practice: Timing and Entries
Get my #1 tip for improving your scores straight away.
Request an email or chat with Paul on how Bridge Champions can improve your game.