Last updated: 8/3/2026

Introduction

At Chessalyz, we are committed to protecting your privacy and ensuring the security of your personal information. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our chess analysis platform and related services.

Cookie Policy

Last updated: December 16, 2025

Chessalyz uses cookies and similar technologies to provide, protect, and improve our services. This policy explains what cookies we use, why we use them, and how you can control them.

What are cookies?

Cookies are small text files stored on your device when you visit a website. They help websites function properly, remember preferences, and understand how users interact with the site.

How Chessalyz uses cookies

We use cookies and similar technologies for the following purposes:

1. Essential cookies (required)

These cookies are necessary for Chessalyz to function correctly. They enable features such as:

User authentication and login
Security and fraud prevention
Saving your preferences

These cookies cannot be disabled.

2. Analytics cookies

These cookies help us understand how users interact with Chessalyz so we can improve performance, features, and usability.

We use third-party analytics tools, including:

PostHog for product analytics and usage insights

Analytics data may include:

Pages viewed and actions taken
Device and browser information
Approximate location (country or region)

We do not sell this data or use it for advertising.

Referral and campaign attribution. To understand where our visitors come from, we record basic first-party attribution details when you arrive: a referral code or link (?ref), campaign tags (utm_*), and the website that referred you (its domain, without any query string). Some of this is kept only for your current browser session (cleared when you close the tab) so we can correctly attribute a signup you complete in that visit; if you accept analytics cookies, we also keep a first-party record for up to 90 days to recognize your original source across visits. This information is first-party, used only to measure our own traffic sources, and never sold or shared with advertisers.

3. Feedback and support tools

These tools allow users to report bugs and submit feedback directly from the site.

We use tools such as:

Ybug for bug reporting and feedback collection

When you submit feedback, information such as screenshots, page URLs, and technical details may be collected to help us diagnose issues.

Managing your cookie preferences

You can manage or change your cookie preferences at any time by:

Opening Cookie Preferences from the site footer or settings page
Adjusting your browser cookie settings

If you disable analytics or feedback cookies, some features may be unavailable, but core functionality will continue to work.

Changes to this policy

We may update this Cookie Policy from time to time. Any changes will be reflected on this page with an updated date.

Contact

If you have questions about this Cookie Policy or our use of cookies, contact us at: [email protected]

Information We Collect

Personal Information

Account information (username, email address, password)
Chess.com and Lichess usernames when you connect your accounts
Profile information and preferences
Communication data when you contact us

Chess Game Data

Game records (PGN files, moves, positions)
Game metadata (dates, time controls, ratings)
Analysis results and insights
Performance statistics and trends

Technical Data

IP address and device information
Browser type and version
Usage patterns and analytics
Cookies and similar tracking technologies

How We Use Your Information

Provide and maintain our chess analysis services
Sync and analyze your chess games from connected platforms
Generate personalized insights and recommendations
Communicate with you about your account and our services
Improve our platform and develop new features
Ensure security and prevent fraud
Comply with legal obligations

Email Communications

We send emails to registered users for account and service-related purposes only. We do not send promotional or marketing emails. The types of emails you may receive include:

Account notifications: Password resets, account security alerts, subscription confirmations
Service updates: Important platform updates, maintenance notifications, feature announcements
Activity reminders: Notifications about incomplete game analyses, reminders to complete actions you started
Re-engagement communications: Gentle reminders if you haven't used the platform for an extended period
Support communications: Responses to your inquiries and customer support requests

Our Email Commitment

• We never sell or share your email address with third parties for marketing purposes

• All emails are directly related to your account activity and our chess analysis services

• You can contact us at [email protected] to adjust your communication preferences

By creating an account, you agree to receive these service-related communications. These emails are necessary for us to provide you with our chess analysis services and maintain your account security.

Information Sharing

We do not sell, trade, or otherwise transfer your personal information to outside parties except in the following circumstances:

With your explicit consent
To service providers who assist us in operating our platform
When required by law or to protect our rights
In connection with a business transaction (merger, sale, etc.)

Model Training and Public Data Sources

To improve our chess analysis algorithms and provide better insights, we may use chess game data for model training purposes. All data used for such training comes exclusively from publicly available sources, including:

Chess games in the public domain from historical databases
Publicly shared game collections with appropriate licensing
Open-source chess game databases
Games explicitly made public by their creators
Competition games that are part of public record

Copyright and Fair Use Compliance

Chess moves and game sequences are generally considered facts and are not subject to copyright protection. We ensure that all training data is sourced from public domain collections, open databases, or materials used under fair use principles. No copyrighted analytical content, commentary, or proprietary databases are used without proper authorization.

Your personal games and analysis remain private unless you explicitly choose to make them public. We never use private user data for model training without explicit consent, and any such usage would be clearly disclosed and opt-in only.

Data Security

We implement appropriate technical and organizational measures to protect your personal information against unauthorized access, alteration, disclosure, or destruction. This includes encryption, secure servers, and regular security assessments.

Your Rights

You have the right to:

Access and receive a copy of your personal information
Rectify inaccurate or incomplete information
Delete your personal information (subject to legal requirements)
Restrict or object to certain processing activities
Data portability for information you provided
Withdraw consent where processing is based on consent

Cookies and Tracking

We use cookies and similar technologies to enhance your experience, analyze usage patterns, and provide personalized content. You can control cookie preferences through your browser settings.

Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us at:

Email: [email protected]
Subject: Privacy Policy Inquiry