Skip to content

YiChess legal center

Policies for accounts, payments, privacy, fair play, and AI review.

Formal legal pages for YiChess, operated by Vistasense AI Technology Limited. Last updated May 31, 2026.

Cookie Policy

Last Updated: May 31, 2026

Product / brand: YiChess Product website: https://yichess.com Operator and seller-facing entity: Vistasense AI Technology Limited, a Hong Kong limited company, Company No. 80364727, Business Registration Certificate No. 80364727-000-05-26-8, registered address: Room 1602, 16/F, Wing On Centre, 111 Connaught Road Central, Hong Kong. Support: support@yichess.com

1. What Cookies Are

Cookies are small files or identifiers stored on your browser or device. Similar technologies include local storage, session storage, SDK identifiers, server-side session identifiers, pixels and device/browser identifiers.

2. Why We Use Cookies

We use cookies and similar technologies to operate the platform, keep users logged in, secure accounts, prevent fraud, maintain OAuth and checkout flow integrity, remember preferences, measure performance and improve the product.

Strictly Necessary Cookies

These are required for core functionality and cannot be disabled through our cookie preference tool. They may include login sessions, CSRF protection, OAuth state and nonce, security tokens, email verification flow state, password reset flow state, checkout session state, load balancing, fraud prevention and platform reliability identifiers.

Functional Cookies

These help remember preferences such as language, region, board settings, theme, accessibility settings, last-used login method and user interface preferences.

Analytics Cookies

These help us understand product usage, page performance, feature adoption, errors and reliability. Where required, analytics cookies are optional and can be refused without blocking core account login, learning content, AI review or paid entitlements.

Marketing Cookies

We do not use marketing cookies unless disclosed and, where required, consented to separately. If we later use marketing or attribution tools, we will update this Policy and consent flows where required.

4. Google Sign-In Cookies

If you choose Sign in with Google, Google may use cookies or similar technologies to authenticate your Google Account and return an identity token to us. Google sign-in is optional; users may use supported email login methods instead.

5. Payment and Checkout Cookies

Paddle, Stripe or another approved payment provider may use cookies, redirects, device checks, QR-code flows or similar technologies to authenticate payments, prevent fraud, confirm payment status, calculate taxes, process refunds and handle chargebacks. Provider technologies are governed by the relevant provider’s own notices.

6. Managing Cookies

You can manage cookies through browser settings and, where provided, our cookie preference tool. Blocking strictly necessary cookies may prevent login, account security, checkout, Google sign-in, password reset, email verification, paid entitlement delivery or other core features from working.

7. Contact

Cookie and privacy questions: privacy@yichess.com Support: support@yichess.com