Chess Online & Offline is a feature-rich chess application that caters to both casual players and serious enthusiasts. The app allows users to engage in online matches with opponents worldwide, while also offering offline play against a sophisticated computer AI. With its elegant design, classical music integration, and advanced gameplay features, the app provides an immersive chess experience.

The app stands out through its innovative features such as customizable chessboards, detailed move markers, and premove functionality. It also includes over 3000 game openings with variations, puzzles for skill development, and global rankings based on ELO ratings. Whether you're looking to improve your skills or simply enjoy a match, this app offers something for every chess player.

Ideal for players of all levels, Chess Online & Offline supports various time-limited game modes including Classic, Blitz, and Bullet formats. Its intuitive interface, combined with light and dark theme options, ensures a comfortable user experience across different devices. This makes it a versatile tool for both learning and competitive play.

Chess Online & Offline distinguishes itself through a comprehensive set of features designed to enhance the chess-playing experience. One of its core strengths is the ability to play online with opponents from around the globe, complete with ELO-based rankings and country-specific leaderboards. The app also supports inviting friends for private matches, adding a social dimension to the gameplay.

Offline mode offers a robust AI opponent with 16 difficulty levels, catering to beginners and experts alike. The inclusion of helpful visual markers, such as legal moves and check indicators, makes the game more accessible without compromising on depth. Advanced features like premove functionality and game history browsing provide tools for faster and more strategic play.

Beyond traditional gameplay, the app includes over 500,000 tactical puzzles covering various scenarios like forks, pins, and endgames. These puzzles not only help sharpen skills but also reward players with points and speed bonuses. Combined with its sleek Material Design 3 interface, customizable themes, and classical music soundtrack, Chess Online & Offline delivers a polished and engaging chess experience.

Chess Online & Offline ensures the authenticity and flexibility of chess rules, offering a seamless experience for players. The app adheres strictly to classical chess regulations while providing variations that cater to different play styles.

Players can enjoy time-limited games in Classic, Blitz, and Bullet modes, each with specific time controls that respect traditional tournament standards. This allows users to engage in fast-paced matches or take their time in strategic battles, depending on their preference.

The app also supports advanced features like pending moves (premoves) and helpful markers showing legal moves, last move, possible captures, and king in check. These elements enhance gameplay without compromising rule integrity, making it accessible for beginners and challenging for experts.

With over 3000 game openings recognized by the app, users can explore famous strategies such as Sicilian Defense and Queen's Gambit. This extensive library not only respects established chess theory but also encourages players to experiment with various tactics, promoting both learning and enjoyment.

The AI opponent in Chess Online & Offline is designed to provide a high-quality challenge across all skill levels. Utilizing a strength scale from 600 to 2100 ELO rating, the computer adapts to match the player's abilities, ensuring an engaging experience whether you're a novice or an expert.

Offline practice allows users to hone their skills against the AI without affecting their online rating. With 16 difficulty levels available, players can incrementally increase the challenge as they improve, fostering growth and mastery of the game.

The AI's performance is calculated using the Arpad Elo formula, which is renowned for its accuracy in assessing player rankings. This guarantees that the AI provides a fair and competitive match every time, simulating real-world opponents effectively.

In addition to standard play, the app offers more than 500,000 tactical puzzles, including mate-in scenarios and other challenges. Solving these puzzles quickly earns speed bonuses, further enhancing the depth and quality of training against the AI opponent.