openingtree VS api

If you know his account on any chess sites you can take a look at it on https://www.openingtree.com/ and find a line he plays that is bad for him, intentionally go for it and have some prep once you there.

I would recommend https://www.openingtree.com/ to start.

Might it be openingtree?

openingtree(https://www.openingtree.com/) will analyze hundreds of your games and let you see, move by move, where you tend to go wrong.

The 3rd thing is that the account is 9 days old. There is some really suspicious behavior here, including his best win being against a 2178 and his worst loss being against a 1214! (according to https://www.openingtree.com/).

Maybe use this website: https://www.openingtree.com/ and filter the games from a certain time frame, like you played that opening exclusively for a week, and then see what happened there, what were the most common positions, and that's the direction I'd take to learn from. Worrying too much about main lines doesn't have much practical value

https://www.openingtree.com/ contains both lichess and chesscom games. Here's Eric Rosen explaining how this works https://www.youtube.com/watch?v=AJ66-HqdpXE

If you want a specific subset of games, you can use the API (there's also a button on individual profiles to download all of their games): https://lichess.org/api

API's are used to talk with web servers like Lichess: https://lichess.org/api

Other than that, the code is probably ready for GitHub. If you felt like extending it, you can use the lichess API to automate finding puzzles rather than having them in a file that you just read from.

Here is documentation on the Lichess Bot API: https://lichess.org/api

Considering you have some "data science" experience with Python, you might be interested in doing some analysis based on data you can get from the Lichess API or databases.

The Lichess API is documented at https://lichess.org/api

I coded this in a very simple way, just an HTML page with an inline script tag with some JS for updating the UI and such. But I think using Vue.js or another framework would be great for a Lichess-based project. These three pages are pretty useful: https://lichess.org/developers (for embedding a board like I did) https://lichess.org/api (API for getting data) https://database.lichess.org/ (database, for when nothing else works :))