ChessFlow

Discover ChessFlow – a modern chess companion built for reviewing positions with Stockfish move suggestions and tactical training through real Grandmaster puzzles. Whether you are a beginner looking to improve your tactical vision or an advanced player exploring complex Grandmaster positions, ChessFlow provides the cutting-edge tools and engine insights you need to succeed.

⚡ NATIVE STOCKFISH ENGINE SPEED
Find the best move in seconds! ChessFlow integrates the powerful Stockfish engine directly into your device using high-performance C++ and JNI. Because the engine runs 100% locally on your phone, you get instant, world-class move suggestions completely offline, without draining your battery or relying on external servers.

🏆 REPLAY HISTORY: PUZZLES FROM GRANDMASTERS & WORLD CHAMPIONS
Sharpen your tactical awareness by walking in the footsteps of the legends! Unlike other apps with artificial, computer-generated setups, ChessFlow features a premium, curated puzzle library extracted directly from real, historic, and modern games played by Grandmasters and World Champions.
- Authentic Tactics: Learn how the greatest minds in chess history delivered their winning combinations.
- Categorized Difficulty: Filtered from Easy to Very Hard, each puzzle challenges you to find the absolute best move in a real-game scenario.
- Adaptive Learning: Test your skills with a strict 3-attempt limit per puzzle.
- Interactive Feedback: Watch animations of the opponent's last move to visualize the threat before you respond.
- Progress Tracking: Securely log in with Google to sync your completed puzzles and track your growth seamlessly across devices.

🔍 ADVANCED POSITION REVIEW & BOARD CORRECTION
Have a specific chess position you want to check? ChessFlow gives you absolute control over the board:
- FEN Import & Export: Easily parse and generate standard FEN strings to share positions with other engines or platforms like Lichess.
- Board Editor Mode: Modify any position on the fly. Add pieces, clear the board, switch sides to move, or use the Eraser Mode to fine-tune your setup.
- Built-in Legality Shield: Never waste time with invalid setups. The app automatically validates king safety, overlapping pieces, and illegal checks before passing the data to Stockfish, ensuring flawless engine stability.

🎨 MODERN, CLEAN & INTUITIVE UI
Designed with Jetpack Compose, ChessFlow offers a smooth, responsive, and distraction-free user experience. Flip the board with a single tap, toggle engine thinking times, and read real-time evaluations through a beautiful layout inspired by classic wooden and paper chess aesthetics.

KEY FEATURES:
- Puzzles from legendary games played by World Champions and Grandmasters.
- Native Stockfish integration via C++/JNI for maximum local processing power.
- Interactive chess tactics categorized from Easy to Very Hard.
- Full Board Editor with piece insertion, deletion, and turn-switching.
- Automatic illegal position checking to prevent engine crashes.
- Seamless Google Sign-In and Realtime Database synchronization.
- Elegant, responsive design with smooth board transitions and animations.
- Offline support for core board and engine features.

Stop guessing your best moves. Download ChessFlow today and carry a grandmaster-level chess engine and a personal tactics coach right in your pocket!