If anyone else needs help beating their online-chess-playing brother, https://www.openingtree.com/ can be used to find their most common moves, as well as the results of the games where those moves are played.
What does this provide that the chess.com analysis engine doesn't? I'm a chess rookie but I find the engine's suggestions and playing through paths much more useful than just seeing what moves people have played against me and their win rates. Is this a tool that only becomes useful for higher rated players?
It’s useful to study the positions you might see in a game and prep your opening lines and plans before you play. Obviously if you playing a random opponent it’s not that useful, but there are leagues such as the 45+45 league where you know your opponent up to a week in advance.
Ah I hadn't clocked that part - it's actually a tool to get the upper-hand against a _particular_ known opponent. Not that useful to me, but cool to know it exists!