I do a lot of tactics training on various websites and one specific app. These tactics are superior without question! The other tactics are usually computer generated. If you look at those other tactical puzzles youll realize that you are being trained on tactics that you will almost never use because the average player who needs a tactic trainer to move up the class D and C levels wont be playing opponents who put themselves in such positions. Kudos to the Memphis CC for all the work it took to record, compile, and produce the material so this book and app could be created! :-) Keep em coming!!
Dr dunn 3st about Memphis Chess Club