opening-explorer

♟️ Free, local-first chess analysis desktop app powered by Stockfish & PyQt6. Offline game review, move classifications (Brilliant, Blunder), opening explorer, and AI coaching. A privacy-focused alternative to Chess.com & Lichess.

Your chess, in plain files — a self-hosted chess workbench: engine analysis, studies, notes, games, and book-fed puzzles

Native macOS chess database — a lightweight ChessBase alternative. Browse, annotate and analyze PGN collections with a bundled Stockfish. Swift + Rust.

Opening explorer, book manager, and opening-book generator for 4-player chess engines. Build, analyze, balance, merge, and generate opening books for 4PC engine development, testing, and self-play.

The Lichess analysis tree — turbocharged, optimized, and packaged as a standalone npm library with full PGN import/export.

You already know 1.e4. This tells you who to blame for it.

Desktop chess board with live Stockfish analysis and a personal game database (PySide6)

Offline-first chess analysis desktop app for Windows: native UCI engines, an offline opening explorer, and move sounds.

Caissa Codex: a free reference of the 3,690 named chess opening lines, with Lichess statistics