Good app just needs a bit of work.
I have gotten into chess for some time now and I wanted to practice my openings and I saw this app so I decided to install it it is very in depth with most likely all the types of variations, gambits and I might go as far as to say that it might have all of them. The app is well thought but needs work like the openings in explore it doesn’t have a knight opening it doesn’t let me and I don’t understand what the numbers are for only guess I have is the amount of advantage you might have after playing them. So overall a great app for beginning to learn but it can go deeper to go with other moves and not just learn one opening with only one way for your opponent to respond it should be able to respond with a different opening each time you play it but all in all a good app.