Hi, I'm going through Susan's Polgar's book on tactics. I have to say, this book is so much better than Winning Chess Tactics by Yassir Seirawan. By leaps and bounds.

Anyway, I'm having problems with the deeper problems that usually occur around problem 20-30 out of 50. I can usually get the problems where you need to think 2 levels deep. First you need to "engineer" the board to create the tactic. Then you use the tactic. Then you grab the piece (or mate, or whatever).

Once the problems get harder, my guess is that they are 3 levels deep. I'm having a hard time imagining the end picture on most of them. I'm also having trouble seeing what the opponent might do. It just looks like there are no forcing lines to setup the tactic.

Maybe I'm going about it all wrong and these problems aren't 3 levels deep but just harder to spot.

Anyway, can anyone offer tips to solving the more complex problems?

Yasser Seirawan's book is there to give basic ideas to beginners.  It's not meant to be an intensive tactics training book.

Tip for solving the more complex problems:

Keep solving the others and trying to push yourself.  It'll come.