Features: - Chess opening tree with game statistics - The Encyclopedia of Chess Openings (ECO) - Database of top 100+ grandmasters’ repertoires - Stockfish chess engine analysis - Compare ECO, opening tree and engine moves side by side in any position - Import and export chess openings in PGN format - Build your own opening repertoire - Add or edit comments on moves - Automatically classify any sequence of moves using the ECO system - Chess opening explorer highlights moves already in your repertoire - Chess database includes all transpositions - Interactive trainer to memorize your chess openings and variations - Train multiple variations at once against random opponent moves from your repertoire - Set up a starting position for training - Track your training progress - Customize chessboard colors and chess pieces - Supports dark mode - No ads - Works completely offline CHESS OPENING EXPLORER Search in the Encyclopedia of Chess Openings, browse the chess opening tree, explore the ope...