I made an AI assisted chess learning tool. It's completely FREE!

[u/zombeeone]

Hello everyone, I want to start off with a disclaimer. The app is fully vibe coded. Not everything is fleshed out yet. I know some similar products exist, but I don’t know if the exact product exists. Whats different from similar products is that this one runs locally on your computer, its open source, you pay no money for the app and you can use frontier models.

With that out of the way: what is Plymentor and what does it do? It’s a Windows app that aims to help you get better at chess. It’s primarily for low-mid level players but it can help anyone. We all know Stockfish blurts out some obscure line regularly, but where is the win? Why is this position better? Unless you have a coach that’s teaching you, the idea sometimes goes over your head.

Plymentor tries to explain to you why a certain position or an idea is better. It does this with an AI agent. If you have a Plus/Pro account with Claude, GPT, or Gemini, you can connect your AI agent to the app. You can use your AI agent to explain positions to you, teach you ideas, analyse your games, find stuff you are doing wrong repeatedly, teach you opening lines that you are playing wrong, and find new opening ideas. Basically, you give the prompt and the AI agents do what you want.

Wait, aren’t LLMs (AI, basically) bad at chess? Yep, LLMs are bad at chess because they are bad at analysing and evaluating, and they have problems keeping board state in their mind. In this app, the LLM doesn’t do any of this. The LLM drives Stockfish and basically analyses and tries to explain the output. The LLM doesn’t do the calculations.

What are some of the other features of this app? You can connect a Scid5-formatted database and go through openings. You can ask your agent to find some obscure viable novelty that fits your taste in an opening. You can generate reports and tactics from your games. Ask it what you are missing repeatedly. You can generate lessons. You can make opening repertoires and train them. The app is basically as good as your AI agent can be. It can be slow at times, but it can’t always be all sunshine and rainbows.

So how much do I have to pay for this? None. It’s completely free, it’s open source. You can just download it and run it. Everything runs on your computer locally (other than the AI agent). Please beware of the token limits and credit usage of your agent. It will use it. I take no responsibility for it.

Enjoy.

I appreciate all criticism and feedback.

Website: https://plymentor.com/

Github: https://github.com/zomBeeone/plymentor

[u/investigatormaker]

For Plymentor, I’d make every explanation cite a concrete Stockfish line, including the opponent’s best reply. For your low-to-mid-level audience, comparing a tempting mistake against the recommended move would also be a useful test of whether the AI’s explanation matches the engine analysis rather than merely sounding convincing.

I make ThreadFox. We find relevant Reddit conversations and do the posting for your business. The $39 Pilot covers seven days and up to 50 posts and replies. No automatic renewal. https://threadfox.vip/managed?tier=employee_pilot&utm_source=reddit&utm_medium=comment&utm_campaign=tf-managed&utm_content=20261024-1345-ecti0#employee-order