Terms of use

Last updated October 3, 2026. You agree to these terms when you make an account, and when you start an analysis on the front page.

What Plysight is

Plysight analyzes chess games and helps you understand your own play. It's operated by Theodore Lattis, an individual based in New York City, United States, and it's an independent service, not affiliated with Lichess or chess.com. It's free to use and paid for by ads.

Using it

• Use it for your own games, or games you have the right to use. Don't use it to harass anyone or to build a profile of a person other than yourself.
• You keep your rights in the games you bring and the messages you write. You give Plysight permission to process them to do what you've asked: analyze them, answer you, keep what you save.
• Don't try to break, overload or get around the limits of the site. Don't send it work with bots or scripts, in bulk, or by scraping it. Assistive technology is always fine.
• Upload only supported chess game files. See "How to get your games" for the formats. Don't upload anything unlawful.
• Don't submit sexually explicit content, content that sexualizes minors, or sexual content aimed at minors, in files, messages or names. Plysight may close an account that does and remove the material. A message that describes abuse to ask for help isn't prohibited content.
• Don't use Plysight for help during a game where the rules of the site you're playing on forbid outside assistance. It's for looking at games you've finished.

Accounts

• Accounts are for people 13 and older. You'll be asked your date of birth once, when you make an account.
• Keep control of the email address you sign in with; anyone who can read its email can sign in as you.
• Your account carries a choice about ads; the privacy policy explains it, and you can change it under "Your privacy choices", linked at the foot of every page.
• You can delete your account at any time from your account page. Plysight may close an account that breaks these terms.

The AI guide

• The AI guide is for people 18 and older. Anyone not signed in is asked once whether they're 18 or over. It stays closed to accounts under 18 and to a browser that has told us its user is under 18.
• It's an AI chess assistant, not a human coach. It's built on Anthropic's Claude.
• It can be wrong. Its explanations are generated by an AI and can be mistaken; the engine's numbers depend on how deeply it looked. The site checks that every number the guide quotes matches your own analysis, but that doesn't make the analysis itself beyond question.
• Don't give it personal details about yourself or anyone else, and don't rely on it for medical, legal, financial or emergency help. If you're in danger or thinking of hurting yourself, contact your local emergency number or a crisis line.
• What you write to it, and facts from your games it needs to answer, are sent to Anthropic; see the privacy policy.

Ads

Plysight shows ads, matched to the page and to the general subject of your question, through an advertising partner. The privacy policy says what the partner receives and how to limit it. Plysight doesn't choose individual advertisers and isn't responsible for what they sell. It keeps whole categories out, and investigates any ad you report and acts on what it finds.

Reports and sharing

A report is made for you. A saved report is private to you unless you turn on its share link, which lets anyone who has it read that report. You're responsible for who you give the link to. Turning it off stops the link from working; copies or screenshots already made are out of Plysight's hands.

No promises about accuracy or availability

The analysis comes from a chess engine and rules of thumb; it's an aid to understanding, not a rating, a guarantee or professional advice. Plysight is provided as it is: it may be slow, unavailable, or change, and reports may be incomplete or wrong. To the extent the law allows, Plysight isn't liable for losses that come from using it, and where a limit is unavoidable, its total liability to you for all claims is one hundred US dollars.

If Plysight closes

If we plan to permanently close Plysight, account holders get an email and the site shows a notice at least 30 days before, and in that time you can delete your account or copy what you want to keep. An unexpected outage or an urgent closure may not allow notice. After a closure, what's on the live site is deleted; backup copies and what providers hold follow their own periods in the privacy policy, and anything the law requires to be kept is kept only for that.

Changes

These terms may change; the date at the top says when. For a change that matters, account holders get an email and the site shows a notice at least 30 days before it takes effect. Using Plysight after that date means you accept the change; if you don't, delete your account and stop using the site.

Law and contact

These terms are governed by the laws of the State of New York, United States, without regard to its conflict-of-laws rules. Nothing in these terms limits any mandatory consumer protections that apply under the laws where you live. Questions: [email protected].