This chess training app focuses on sharp variations in open games, ideal for club and intermediate players. It covers theory and practical applications of openings arising from 1. e4 e5 2. Nf3 Nc6 3. Bc4, offering a comprehensive overview and 630 exercises.

Part of the Chess King Learn series (https://learn.chessking.com/), this app uses a unique teaching method. The series includes courses on tactics, strategy, openings, middlegame, and endgame, catering to all skill levels, from beginner to professional.

Improve your chess skills, learn tactical tricks and combinations, and solidify your knowledge through practice. The app acts as a personal coach, providing exercises, hints, explanations, and refutations of common errors.

The app features:

• High-quality, verified examples
• Interactive theoretical lessons
• Adaptive difficulty levels
• Varied exercise objectives
• Hints and error analysis
• Play against the computer
• ELO rating tracking
• Flexible test settings
• Bookmarking capabilities
• Tablet-optimized interface
• Offline functionality
• Cross-platform account syncing (Android, iOS, Web)

A free version lets you try the app before purchasing the full course. The free portion includes fully functional lessons covering:

1. Chess Tactics in Open Games:

   • Giuoco Piano (Italian Game)
   • Evans Gambit (4. b4)
   • Two Knights Game

2. Chess Tactics in Open Games: (Repeated sections - likely a typo in the original text)

   • Giuoco Piano (Italian Game)
   • Evans Gambit (4. b4)
   • Two Knights Game