We made a tool that lets you search the lichess game database by chess concepts. Link in the comments : r/chess

Chess Database with Master Chess Games

Chess Openings and Book Moves

How can I see my opening stats? - Chess.com Member Support and FAQs

The Outpost Chess and Opening Master Partner to Create Global Chess Community for Players, Coaches, Arbiters, and Clubs

Openingmaster - biggest chess database ♟️ Official FIDE EDU Partner

Master Chess Openings, Chess Wiki

Fritz 15 Help

Openings by Opening Master

Chessify on X: Chess databases offer you multiple benefits - opening stats, game search, opponent info - and Chessify offers the biggest online database with weekly updates coming automatically. 😉 You will

How To Use The Opening Explorer - by Nate Solon