Glassfish: AI Chess Coach

Analyze chess positions and get AI-powered insights to help you learn on chess.com and lichess.org.

Elevate your game with an AI chess companion that doesn’t just show you the moves—it teaches you the "why" behind them. Stop staring at engine lines you don't understand. Glassfish sits alongside your Chess.com or Lichess.org board in the Chrome Side Panel to provide real-time, conversational analysis. Whether you’re stuck in a complex mid-game or trying to convert an endgame advantage, Glassfish acts as your personal coach, offering everything from subtle nudges to deep strategic breakdowns. Key Features 💡 Intelligent Tactical Hints: Not ready for the answer? Get a tactical nudge that points you toward key squares, threats, or positional concepts without spoiling the solution. 🎯 Move Explanations & Line Breakdown: See top engine moves instantly, accompanied by natural-language explanations of strategy, tactical motifs, and refutations of alternative moves ("Why not X?"). 💬 Interactive Chess Chat: Have questions about a specific line? Ask the AI! "Why is the Bishop better than the Knight here?", "What happens if I push my h-pawn?", or "What is my opponent's primary plan?" 🧠 Grounded Chess Harness: Combines Stockfish engine analysis, dynamic depth scaling, tactical motif detection (forks, pins, hanging pieces, outposts, pawn structure), and move verification tools to eliminate AI hallucinations and ensure complete accuracy. ⚡ Live Thinking Card Widget: Watch your AI coach analyze positions in real time. A collapsible widget in the side panel transparently displays reasoning steps and tool execution. 🌐 Multi-Provider LLM Intelligence: Choose your preferred AI provider! Full support for Google Gemini (Flash, Pro, Thinking), OpenAI (GPT-4o, o3-mini, o1), Anthropic (Claude 3.5/3.7), Groq (Llama 3.3), and OpenRouter (Free DeepSeek R1/V3, Llama 3.3) with clear relative cost indicators. ⚡ Seamless Side Panel Integration: Integrates cleanly into Chrome's native Side Panel (`chrome.sidePanel`) for convenient, side-by-side analysis during study sessions on Chess.com and Lichess.org. Why use Glassfish? Standard engines like Stockfish are incredibly powerful, but their "advice" is often just a string of evaluation numbers (+1.2) and move variations (e4 e5 Nf3 Nc6). Glassfish translates those numbers into actionable human concepts, helping you recognize patterns, improve your board vision, and build long-term skill. Perfect for: - Beginners looking to understand basic tactics and piece coordination. - Intermediate players striving to break through plateaus and master positional strategy. - Anyone who wants a more "human" and interactive way to review games. How to Use 1. Obtain an API key from your preferred provider (e.g. Google AI Studio, OpenAI, Anthropic, Groq, or OpenRouter). 2. Open the Glassfish Side Panel in Chrome and click the Settings icon (gear) to choose your model provider and paste your API key. 3. Open an analysis or study board on Chess.com or Lichess.org. 4. Click "Get Hint" for a non-spoiler clue, "Explain Move" for detailed insights, or use the interactive chat for custom follow-up questions! Disclaimer: Please use Glassfish responsibly. This tool is designed strictly for post-game analysis, study boards, and educational learning. Always follow the fair play terms and policies of the platform you are using.