Terms of Service

Agreement to Terms

By accessing and using dxc4.com (the "Service"), you accept and agree to be bound by the terms and provision of this agreement. If you do not agree to abide by the above, please do not use this service.

Description of Service

dxc4.com is a web-based chess analysis tool that provides:

• Chess position analysis using the Stockfish engine
• Game import and export functionality (PGN format)
• Opening detection and classification
• Win probability visualization
• Interactive game navigation tools

The Service is provided free of charge and operates entirely within your web browser.

Acceptable Use

You agree to use the Service only for lawful purposes and in accordance with these Terms. You agree NOT to:

• Use the Service for any illegal or unauthorized purpose
• Attempt to interfere with, compromise, or disrupt the Service
• Use automated tools to excessively access or burden the Service
• Reverse engineer, decompile, or attempt to extract source code
• Remove, alter, or obscure any proprietary notices or labels
• Use the Service to transmit harmful or malicious content

Intellectual Property Rights

Our Content

The Service and its original content, features, and functionality are owned by dxc4.com and are protected by international copyright, trademark, patent, trade secret, and other intellectual property laws.

Third-Party Content

The Service incorporates open-source components:

• Stockfish chess engine (GPLv3 license)
• Chess opening database (Lichess data)
• Various open-source JavaScript libraries

These components retain their respective licenses and attributions.

Your Content

Any chess games or analysis you create using the Service remain your property. We do not claim ownership of your games or analysis data.

Privacy and Data Protection

Your privacy is important to us. Please review our Privacy Policy, which also governs your use of the Service, to understand our practices.

Key points regarding data:

• Analysis is performed locally in your browser
• We do not store or transmit your chess games
• No personal information is required to use the Service
• Minimal technical data may be collected for service improvement

Disclaimers and Limitations

Service Availability

The Service is provided "as is" and "as available" without warranties of any kind. We do not guarantee that:

• The Service will be uninterrupted or error-free
• All analysis results will be accurate
• The Service will meet your specific requirements
• Any defects will be corrected

Chess Analysis Accuracy

While we use the Stockfish engine (a leading chess engine), chess analysis is complex and:

• Analysis depth and time limits may affect accuracy
• No chess engine is perfect or infallible
• Results should be considered as guidance, not absolute truth
• Human judgment remains important in chess evaluation

Limitation of Liability

To the maximum extent permitted by applicable law, dxc4.com shall not be liable for any indirect, incidental, special, consequential, or punitive damages, or any loss of profits or revenues, whether incurred directly or indirectly, or any loss of data, use, goodwill, or other intangible losses.

Termination

We may terminate or suspend access to our Service immediately, without prior notice or liability, for any reason whatsoever, including without limitation if you breach the Terms.

Upon termination, your right to use the Service will cease immediately. Since the Service operates in your browser without accounts, termination primarily means restriction of access to the website.

Changes to Terms

We reserve the right, at our sole discretion, to modify or replace these Terms at any time. If a revision is material, we will try to provide at least 30 days' notice prior to any new terms taking effect.

By continuing to access or use our Service after those revisions become effective, you agree to be bound by the revised terms.

Governing Law

These Terms shall be interpreted and governed by the laws of the jurisdiction where dxc4.com operates, without regard to conflict of law provisions.

Contact Information

If you have any questions about these Terms of Service, please contact us through the website or visit our about page.

Acknowledgment

By using dxc4.com, you acknowledge that you have read these Terms of Service and agree to be bound by them.