KarpaChess

KarpaChess is a browser‑based chess learning platform that combines guided lessons, themed puzzles, and an AI‑driven coach. Users can progress through 71 structured lessons covering major topics, then reinforce concepts with 100 hand‑crafted puzzles that focus on specific patterns. The interface supports offline use, stores all data locally, and offers a match‑review feature where an AI commentator provides move‑by‑move annotations.

The AI Coach can be consulted during practice games, offering hints, explanations, and post‑game analysis. It operates with a built‑in offline heuristic engine or can connect to a range of external language‑model providers, allowing users to select models such as Claude, GPT‑4, or locally hosted options. The coach can whisper tips in real time, explain tactics, and suggest alternative plans.

The application is multilingual, requires no account or tracking, and includes tools for importing and commenting on PGN files. Users can customize board appearance, legal‑move highlighting, and sound settings, making it suitable for beginners through advanced players who want a self‑contained, privacy‑focused chess study environment.