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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.

AI Disclaimer

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. Educational Purpose

AI review, move explanations, evaluations, scores, labels, training recommendations and generated learning content on YiChess are provided for educational and training purposes only.

2. No Guarantee

AI outputs may be incomplete, inaccurate, delayed, biased, unsuitable for a particular game, rating level, player, device or learning objective, or inconsistent with another engine or coach. We do not guarantee any rating improvement, win rate, learning outcome or competitive result.

3. Not Professional Advice or Arbitration

AI review is not professional advice, official arbitration, tournament adjudication, legal advice, financial advice, gambling system, investment advice, coaching certification or an official decision.

4. No Real-Time Cheating Assistance

AI review must not be used as real-time assistance during live games, competitions, examinations or restricted play modes. Using engines, bots, scripts, overlays, external tools, another person’s real-time assistance or AI outputs during restricted play may result in enforcement under our Terms and Fair Play Policy.

5. User Responsibility

Users remain responsible for their own decisions, learning choices, fair play obligations, account security and compliance with the rules of any external chess, school, club, tournament or platform environment.

6. Contact

AI review questions: support@yichess.com