> 1. Stockfish, server-side game analysis, learning from mistakes I'm not sure what you mean by 2 and 3, but lichess already has server side analysis. If it's

> 1. Stockfish, server-side game analysis, learning from mistakes I'm not sure what you mean by 2 and 3, but lichess already has server side analysis. If it's just that you'd like to pay for it, you can set up donations. You can also contribute your own server to the analysis cluster. Lichess is a really inspiring project on how a free/open source software community can provide the same value based features that we normally assume can only be done by monetization.