Master chess openings, build your personal repertoire, and hone your opening variations with this comprehensive app.

Key Features:

• Extensive Chess Opening Database: Explore a vast opening tree with detailed game statistics, encompassing the Encyclopedia of Chess Openings (ECO) system. Compare ECO classifications and opening tree moves side-by-side.
• Flexible Repertoire Management: Create and customize your opening repertoire, adding, editing, and organizing your favorite lines. Add comments to moves for personal notes. The app automatically classifies move sequences using the ECO system. A built-in explorer highlights moves already in your repertoire.
• Interactive Training: Memorize and practice opening variations with a powerful interactive trainer. Train white's, black's, or both sides' moves, even training multiple variations simultaneously against randomly selected opponent moves from your repertoire. Set custom starting positions and track your progress.
• Advanced Analysis (PRO): Upgrade to unlock unlimited repertoire size and depth, a significantly larger opening tree, access to top grandmaster repertoires, a powerful chess engine for analysis, and PGN import capabilities.
• Customizable Interface: Enjoy a personalized experience with customizable chessboard colors, pieces, and dark mode support. The app functions entirely offline.

CHESS OPENING EXPLORER:

Search the ECO database or navigate the opening tree. Easily switch between exploration features at any point in the game.

BUILD YOUR REPERTOIRE:

Add your preferred opening lines to your custom repertoire using the explorer. Edit opening names and maintain a well-organized collection.

OPENING TRAINER:

Efficiently memorize opening variations. Train on white, black, or both sides, with the option to train all variations at once against random opponent moves. Track your training progress and view statistics.

Version 1.21.1 (June 27, 2024):

Improved training screen with enhancements including:

• The final training score no longer obscures the chessboard.
• Ability to share or export games and positions during training.
• Option to toggle comments.
• Additional improvements for a cleaner, more focused training experience.