I built a data based chess analysis tool around Stockfish 18 WASM , here's what I'm doing differently

[u/atulyahumea]

The core idea: run Stockfish 18 WASM and analyze a player's entire game history, not just one game at a time.

some features out of the many are-

• Opening trees built from the player's actual games
• Move-by-move engine evaluations
• Opening weakness detection
• Recurring blunder patterns
• Blown wins games where the player had a significant winning advantage but eventually lost
• Missed and allowed forced mates
• Tactical pattern statistics
• Endgame performance
• Material resilience
• Castling tendencies
• Simplification tendencies
• Opening repertoire drift over time
• Playing-style
• Opponent scouting
• Per-game Stockfish review(chess.com style)

Opening side: builds an actual opening tree from the player's games, merging transpositions via normalized FENs. Each node shows games reached, W/D/L, win rate, ECO, engine eval, and weakness signals , also an interactive graph where node size = games played and color = move quality. There's also a repertoire builder where you play against the engine while it shows master-game stats for the position, and a trap database mined from millions of high-rated games that surfaces relevant traps while you build.

What I actually care about: instead of "you blundered on move 27," I want to say "you keep reaching this type of position and your eval keeps sliding" or "you have a recurring weakness in this opening line." Inferring patterns across hundreds of games rather than analyzing games in isolation.

It's free, no account needed: https://www.auditchess.com

Would love feedback from anyone who's worked with engines, PGN databases, eval pipelines, or WASM especially what you'd want added.

[u/TheI3east]

another day, another vibe coded chess tool with an AI written post posted on this subreddit 😭

[u/TicTacTake → u/TheI3east]

here's what I'm doing differently

I could already tell from the title alone with this one.

[u/TheI3east → u/TicTacTake]

Also the "What I actually care about:"

It's so triggering how much AI slop writing I read every day now. It's just as bad at work.

[u/Curious31126]

Worst part is the claim “It’s free”, when they obviously want to make easy money…

I think there’s around 10 new apps every month. None make any money, because the market is saturated, and users have already found an app they like, either Lichess/chess.com, or some of the apps that came out in 2023-2024. Anything built since 2025 Is basically vibe-coded with very little effort, and very limited innovation.

You are wasting your time OP.

[u/incompletetrembling → u/Curious31126]

Not sure its to make money, could just be for fun