Ratings & Reviews performance provides an overview of what users think of your app. Here are the key metrics to help you identify how your app is rated by users and how successful is your review management strategy.
A library of five volumes (A, B, C, D, E), the five main groups of the classification of openings, provides readers a comprehensive collection of modern opening theory. The exclusive annotated database. Examples from over 500 games and analyses are included. This is your app for learning and improve your opening repertoire.
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