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

sql - Databases for chess games - Stack Overflow

Small Encyclopedia of Chess Openings ABCDE on CD (3rd Edition)

DEEP Hiarcs Chess Explorer for Windows

Opening Explorer : Premium Only ? - Chess Forums

ICCF

Master Chess Openings, Chess Wiki

How to use a Chess Database to Improve your Openings

Databases: Tips, Tricks, and Softwares

chess-database · GitHub Topics · GitHub

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