Gradient Games vs Knight & Castle

Gradient Games is a simple, colorful board game collection where you can create and share themes! Challenge friends to local games on the same device. Currently includes chess, reversi, and checkers.

Play chess offline against Stockfish and learn from every move. Knight & Castle is a focused chess trainer for players who want a strong opponent, instant move feedback, and practical guidance—without an account, matchmaking, or an internet connection. PLAY AND IMPROVE OFFLINE • Play against Stockfish from Beginner to Expert • Choose White or Black • No account or online opponent required • Practice anywhere, even without an internet connection UNDERSTAND EVERY MOVE After each move, see whether it was a Best Move, Good Move, Inaccuracy, Mistake, or Blunder. Compare your move with the engine’s recommended alternative and identify the moment that changed the game. CLEAR POST-GAME REVIEW Review your game with: • Accuracy • Move count • Mistakes and blunders • The key turning point • The engine’s best alternative LEARN, DON'T JUST PLAY Learning mode includes: • Hints when you are stuck • Take-backs to try another idea • A move list for reviewing positions • PGN export for further study • Opening names for common sequences ON-DEVICE AI COACH On supported devices, AI Coach explains your moves in plain English: • Why a move worked or failed • Which tactical idea you missed • What to focus on next • Themes such as forks, pins, and king safety AI Coach uses Apple’s on-device Foundation Models when available. Move grades and engine recommendations remain available on all supported devices. MADE FOR PRACTICAL CHESS TRAINING Knight & Castle is designed for: • Beginners learning chess fundamentals • Players looking for a strong offline opponent • Chess players studying their mistakes • Anyone who wants private, focused practice The app supports castling, en passant, promotion, checkmate, stalemate, and the 50-move rule. It includes legal-move highlights, check indicators, smooth animations, optional board coordinates, and iPhone and iPad support. No account is required. Games and analysis stay on your device. This app contains ads. Knight & Castle includes the open-source Stockfish chess engine under the GPLv3 license.