Over all its a good app but has its faults like many in the chess category. For beginners it probably is better at teaching, because beginners wont notice move errors the way better players do. To make the authors point in the self imposed restrictions of 10 games for any given opening, many bad move choices are shown as if they were the first candidate move. Intermediate players will be somewhat disappointed by the sloppiness of these lessons.
Also - if you have purchased an opening but it is part of a group of openings that could be had as a group for a cheaper price, no tips are given, so that later when you want to purchase a group of three openings for example, and you have already purchased one of the three you might be slightly irritated you were given no notice of the group purchase first, or that because you have already purchased one of the group, there are other choices you can make ( which there are not).
However, all that being said, it is still one of the better apps out there for demonstrating chess openings, middlegames and endgames. The above criticisms are not meant to be a handicap for purchase of the app, but only as a caveat, and a hope for improvement of the courses. There is no reason to limit the course instruction to 10 games with variations, and there is no reason not to have greater depth and less sloppiness in the choice of candidate moves. I would willingly PAY MORE if they would WORK HARDER at getting the app into a better class of app.
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