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Adds a one-click Analyze button to Lichess + Chess.com games. Opens chessmasti.com with the PGN auto-loaded for AI coaching. Analyze with Chess Masti — your post-mortem starts in one click. Stop letting your blunders die undiagnosed. Stop copy-pasting PGNs. Stop wishing you had a coach. The extension you've been waiting for slips into Lichess and Chess.com, sits quietly in the top nav, and — the second your game ends — opens a real, live, talking AI chess coach with your game already on the board. Free. No account. No paywall. No "you've used 3/10 analyses this month." Just chess. ──────────────────────────────────────────── THE PROBLEM EVERY CHESS PLAYER HAS HAD You just lost a 50-move bullet game on Lichess. The blunder was somewhere around move 28 but it could have been move 14 — you don't actually know. The "Rematch" button is right there. So is "New Opponent". So is "Tournament". So is the rabbit hole. You don't analyze. You click rematch. You lose again, faster. You know — somewhere in the back of your head — that the games you play and don't review are wasted reps. That you're not getting better, you're just paying the rating-points tax for the same mistakes. But analysis is friction: you have to find the share button, copy the PGN, find a tool, paste it, click around. By the time you've done that, the next game has started and the question you cared about — "why did I blunder that?" — is gone. That's what we got tired of. So we fixed it. ──────────────────────────────────────────── WHAT THIS EXTENSION DOES, EXACTLY A single orange button — "♟ Analyze with Chess Masti" — slides into the top navigation bar of every Lichess and Chess.com game page. Between DONATE and the search icon on Lichess. In the equivalent slot on Chess.com. The button does ONE thing: when you click it, your game opens for AI coaching on chessmasti.com in a new tab. Behind the curtain, three things happen in maybe a hundred milliseconds: → The extension recognizes you're on a game page (not a profile, not a forum, not a homepage). → It reads the PGN of the game — from Lichess's public game-export API on lichess.org, or directly from the moves panel on chess.com. → It opens chessmasti.com/analysis with your PGN already loaded, and your coach is waiting. No popup. No settings. No background script. No remote server of its own. It is, by design, the smallest possible extension that turns "I should analyze this" into "this is being analyzed." ──────────────────────────────────────────── THE COACH YOU CAN ACTUALLY TALK TO This is not a "move classifier." Chess.com's built-in Game Review will tell you that move 14 was a Blunder, that move 7 was Excellent, and that your accuracy was 78%. It will not tell you why. It will not answer follow-up questions. It cannot. Chess Masti is a chat. You type "why did I lose move 14?" and the coach answers — grounded in the actual position, with the actual engine evaluation, in plain English calibrated to how you like to be taught (you set the tone in your profile: serious, friendly, brutal, whatever). → Ask why a specific move was a blunder. → Ask what tactic you missed. → Ask "what should I study based on this game?" → Ask "would my opening have held up if my opponent had played sharper?" → Ask "show me the endgame technique I should've used." → Ask anything. The coach has access to every move, every Stockfish evaluation, the full game tree, your saved coaching preferences, your favorite openings, and your study goals. It answers like it's been watching your chess for years — because by the third game, it has. ──────────────────────────────────────────── THE THING NOBODY ELSE HAS: A HALLUCINATION VALIDATOR If you've ever used an LLM-based chess tool, you've watched it confidently tell you that "your knight on f3 attacks the bishop on d5" when there is no knight on f3. LLMs lie about chess constantly. They invent pieces, fabricate threats, invent illegal moves with the same easy confidence they use for the moves that actually exist. We built a layer that catches this. Every single response from the coach — every paragraph, every move reference, every piece-and-square claim — is parsed and checked against the live chess.js board state before it ever reaches you. Claims that don't match reality get rewritten or discarded. The response you read is the response that's actually true. This is the difference between a chess coach that sounds confident and one that's actually correct. It's the difference between "wow this AI is amazing" and "wait, that's not actually what happened." It's the work everyone else skips because it's annoying to build. We built it anyway, because we care about being right. ──────────────────────────────────────────── INSIGHTS YOU CAN SHARE WITH ONE LINK After the coach finishes its initial walkthrough, every critical moment of the game becomes its own insight card — a discrete unit of "here's what happened on move 14, here's why it mattered, here's what to study next." Each card has its own permalink. Send your friend the link to your move-14 blunder card. They click it. They see exactly what you saw — the position, the engine evaluation, the coach's explanation — without anyone paying for a fresh AI call. The whole experience is built for sharing because chess is more fun when you can show someone the exact moment you got mated. ──────────────────────────────────────────── PUZZLES BUILT FROM YOUR ACTUAL BLUNDERS After a coaching response, three puzzles render directly inside the chat bubble. Same board, same UI, no navigation away. They are not generic. They are picked from a curated graph database of over 100,000 Lichess puzzles — quality-filtered for popularity, play count, and rating-deviation tightness, structured across 46 tactical themes and 4 difficulty bands — and then re-ranked by FEN cosine similarity to the position you just got wrong. In English: the puzzles you get are the puzzles that look like your mistake. You solve three of them. The next time the pattern shows up in a real game, your hands know it. ──────────────────────────────────────────── OPPONENT SCOUTING — WALK INTO EVERY GAME PREPARED You're queued up for a match. The pairing pops. The opponent's name appears. Right now, that name is meaningless to you. You move first, you find out who they are. In a separate part of Chess Masti, you can paste a Lichess or Chess.com username and get back: → Opening trees they actually play (so you know what to expect) → Repertoire collisions against yours (where they'd run into your prep) → A Stalker Score — how exploitable they are, ranked → Tilt and timeout psychology (do they crack under time pressure? Do they lose more when they're losing?) → A shareable SVG player card All from publicly available game history. Nothing private, nothing authenticated. Just the homework you wish you had time to do, automated. ──────────────────────────────────────────── TWIN BOT — A BOT THAT BLUNDERS LIKE A HUMAN Practice against your friend's playing style without your friend being available. Twin Bot is powered by Maia-2, a neural network from NeurIPS 2024 that predicts the moves a human at a target Elo would actually play. Not a weakened engine. Not an engine with random noise injected. A model trained on human games that has internalized how humans at every rating actually think. Set Twin Bot to your friend's 1800 rating and play someone who makes the kinds of moves a 1800 actually makes — including the kinds of blunders they'd hate to be reminded of. ──────────────────────────────────────────── WHAT YOU CAN ASK THE COACH (REAL QUESTIONS) → "Why did I lose on move 14?" → "What was the critical mistake here?" → "Show me the tactic I missed." → "How do I avoid this kind of structural weakness?" → "What should I study based on this game?" → "Was this a Sicilian Najdorf? Did I play it correctly?" → "If my opponent plays the Italian next time, what's the best response?" → "Walk me through the endgame technique I should have used." → "What openings do I keep losing in?" → "What was my biggest pattern of mistakes across my last 10 games?" The coach answers with chess that's been validated, with engine evaluation backing every claim, in language tuned to how you want to be taught. ──────────────────────────────────────────── USE CASES — WHO INSTALLS THIS You should install this if: → You play 1+ game a day on Lichess or Chess.com and never review them. (Most people. This is the cure.) → You're prepping for a tournament and want to scout opponents and stress-test your repertoire. → You're stuck at a rating plateau and don't know which mistakes are costing you most. → You've tried Chess.com's Game Review and want something that explains in plain English instead of just labelling moves. → You've tried other AI chess tools and got fed up with confident-sounding nonsense. → You learn better from conversation than from static reports. → You're a coach and want to give your students a free tool that actually works. → You watch GMs play on Lichess broadcasts and want a coach to explain the moves in real time. → You can't drop $14 a month on a chess subscription. ──────────────────────────────────────────── WHO BUILDS THIS, AND WHY IT'S FREE Built and maintained by Aayan Hetamsaria, a high-school student. There is no paid tier. There is no advertising business model. There is no data sale. There is no "premium" gate. There is no upsell. The whole thing — the extension, the coach, the validator, the puzzle graph, the scouting, Twin Bot, the insights, the permalinks, the works — is free. The mission is grounded coaching for an audience mostly priced out of existing tools — kids learning the game, club players in India and Southeast Asia, anyone whose chess budget is zero. Most chess-coaching products are excellent. Most of them gate progress behind a credit-card field. Chess Masti doesn't. This is not a startup chasing a Series A. This is a teenager who got annoyed at a problem and built the thing he wished existed. ──────────────────────────────────────────── WHAT THE EXTENSION DOES NOT DO → It does not collect personal information. → It does not track your browsing across sites. → It does not have a background page. → It does not have any storage permission. → It does not have any remote server of its own. → It does not run on any site other than lichess.org and chess.com. → It does not modify the content of pages it runs on, beyond adding the single button. → It does not send the PGN anywhere except chessmasti.com. → It does not send anything at all until you click the button. Equivalent in privacy posture to copy-pasting the PGN into chessmasti.com yourself — just faster. Full disclosure of what chessmasti.com itself collects and sends to third parties: https://chessmasti.com/privacy ──────────────────────────────────────────── THE "MASTI" IN CHESS MASTI "Masti" is Hindi for fun. The name is deliberate. Most chess-improvement tools take themselves very seriously, lecture you, and feel like cleaning out the garage. They turn the most exciting game ever invented into homework. Chess is supposed to be fun. The coach has personality. The interface is fast. There's no leaderboard shame, no streak guilt, no "you have to subscribe to unlock the rest of your own game." The improvement comes from caring about the games, not from feeling bad about them. ──────────────────────────────────────────── QUICK START → Install the extension. → Open any game on Lichess or Chess.com. → Find the orange "♟ Analyze with Chess Masti" button in the top navigation bar. → Click it. → A new tab opens at chessmasti.com with your game loaded. → The coach starts talking. Ask it whatever you want. That's it. There's nothing else to learn. No tutorial. No setup. No account required to use the basic flow. ──────────────────────────────────────────── WHAT YOU GET, IN ONE PARAGRAPH A real conversation about every game you play, grounded in Stockfish 17's engine evaluation, validated against the actual board state, with the most-instructive moments saved as shareable insights and the puzzles you should be solving rendered inside the chat — all reached by a single click on the game page you were already on. Free. Forever. No account required to read shared insights. This is the chess coach the internet was supposed to have a decade ago. ──────────────────────────────────────────── LINKS → Site: https://chessmasti.com → Privacy: https://chessmasti.com/privacy → FAQ: https://chessmasti.com/faq → How it works: https://chessmasti.com/how-it-works → Architecture: https://chessmasti.com/architecture → Comparison: https://chessmasti.com/vs Install. Click. Improve. Welcome to Chess Masti.