Terms of Use

You must be at least 13 years old (or the minimum age in your country) to use FlexiChess. If you use it on behalf of an organization, you represent that you are authorized to accept these Terms for it.

You can use the core workstation without an account. If you create one, you are responsible for keeping your login credentials secure and for activity under your account. Authentication is provided by Clerk.

FlexiChess is offered on an evolving basis and some features are in beta. Features may change, be added, or be removed. If we remove a feature that’s central to a paid plan, we treat that like a lowered limit — see section 6. We aim for high availability but do not guarantee uninterrupted or error-free operation.

AI features (such as the coach and game commentary) generate explanations around engine-computed facts. That generated wording can be wrong, and you should not rely on it as your sole basis for any decision.

We will not remove or materially reduce a feature that a paid plan is sold on without at least 30 days’ notice by email; if the change materially reduces what you paid for, you can cancel and we will refund the unused portion pro-rata.

Core preparation tools are free. Paid plans (“Pro”) are available as a recurring subscription; the terms in this section apply to Pro and any future paid tiers.

Pro is offered as a recurring monthly or annual subscription. Payments are processed by Polar, which acts as our Merchant of Record — the seller of record responsible for billing, payment processing, and any applicable sales tax or VAT. By subscribing, you authorize recurring charges to your payment method until you cancel. Prices are shown on the pricing page. If your plan’s price is going up, we will email you at least 30 days before it applies to you; the new price only takes effect from your next billing period, and you can cancel before then to avoid it. If you are on an annual plan, a price change never applies before your current paid year ends.

Cancellation: you can cancel anytime from your account or via Polar’s customer portal (linked from your receipt) — or simply email us at support@flexichess.com and we will cancel it for you. Cancellation stops future renewals; your subscription remains active until the end of the current paid period.

14-day money-back guarantee: if Pro isn’t right for you, email us at support@flexichess.com within 14 days of your first Pro payment — monthly or annual — and we will refund that payment in full. No reason needed. The guarantee covers your first payment; later renewals are not automatically refundable, so cancel before a renewal date if you do not want to be charged again.

Outside that window we consider refund requests case by case, and nothing here limits the refund rights you have under law — see the consumer guarantees in section 8.

Buyers in the EU, EEA and UK: your contract of sale is with Polar as Merchant of Record and seller of record; we supply the service under it. Consumer law in those regions gives you a right to withdraw from a distance contract within 14 days without giving a reason.

We do not ask you to waive that right, so you keep it in full for 14 days even though Pro starts working immediately — and you will not be charged for the part you used. In practice this is the same outcome as the money-back guarantee above, and the same way to use it: email support@flexichess.com within 14 days of your first Pro payment and we will refund it in full, no reason needed.

You retain all rights to the games, PGN/FEN files, annotations, and repertoire you create or upload (“Your Content”). You grant us only the limited license needed to store, process, and sync Your Content to provide the service to you. You are responsible for having the rights to any content you upload.

If content you have published or shared appears to breach these Terms or anyone’s rights, we may remove it, disable the share link, or make the collection private. If we do that to something of yours, we will email you what we removed, why, and how to dispute it — and you can dispute it by replying. The only case where the explanation comes after the fact rather than before is one where leaving the content up would cause immediate harm or where the law requires us to act first.

To report a share link or a public collection — for copyright, privacy, or anything else — email support@flexichess.com. So we can act on it, please include: the link or collection id, what is wrong with it, enough detail for us to verify you have standing to complain (for copyright, that means identifying the work), your name and an email address we can reply to, and a statement that what you have told us is accurate and made in good faith. We aim to act on anything credible the same day, and we reply either way.

Copyright notices (DMCA). Notices under 17 U.S.C. §512 go to the same address, marked for the attention of our copyright contact. If we remove something of yours in response to a notice, we will tell you and you may send a counter-notice; if you do, we will pass it to the complainant and may restore the content unless they tell us they have filed suit.

Repeat infringement. We terminate the accounts of users who repeatedly infringe. In practice: a first substantiated notice gets the content removed and a warning, a second gets publishing privileges suspended, and a third ends the account. We count only notices we have assessed as substantiated, we tell you at each step, and a notice you successfully counter does not count against you. If the account ended is a paid one and the termination was our error, section 10 applies.

FlexiChess includes plan-based usage limits to keep the service sustainable — for example, weekly AI coach questions, cloud game storage, collections, and share links. The full limits table is on the Help page, headline limits on the pricing page, and your live allowances in your account summary when signed in. We may raise limits at any time. If we need to lower a limit on a paid plan, we will give you at least 30 days’ notice by email, and if the lower limit materially reduces what you paid for, you can cancel and we will refund the unused portion of your subscription pro-rata.

You agree not to:

• break the law or infringe others’ rights using the service;
• use automated scripts or bots to scrape, hammer, or bulk-query the API;
• circumvent rate limits, plan limits, or authentication — including by creating multiple accounts to evade caps;
• resell or redistribute AI output or the service at scale except as permitted;
• attempt to disrupt, overload, reverse-engineer, or gain unauthorized access to the service; or
• upload malicious code or content you have no right to share.

If your use exceeds fair limits, we may rate-limit or throttle it to protect the service and other users. We will only suspend a paid account where we have a reasonable belief, based on evidence, that the use is deliberately evading limits or harming the service — and we will email you the reason first, unless the harm is immediate. You can dispute a suspension by email and we will review it and reply within five business days. If we suspend a paid plan and you have not breached these Terms, we will restore your access and refund the affected period pro-rata.

FlexiChess, its branding, and its original software are owned by us or our licensors. The service includes open-source software and licensed chess data; those are credited and governed by their own licenses on the Credits & licenses page. Trademarks of other products (including ChessBase) belong to their respective owners; FlexiChess is not affiliated with or endorsed by them.

The service is provided “as is” and “as available,” without warranties of any kind, whether express or implied, including merchantability, fitness for a particular purpose, and non-infringement, to the maximum extent permitted by law.

Nothing in these Terms excludes, restricts, or modifies any guarantee, right, or remedy you have under law that cannot lawfully be excluded. If you are in Australia, our services come with guarantees that cannot be excluded under the Australian Consumer Law — including that services are supplied with due care and skill and are fit for the purpose we described. For a major failure you are entitled to cancel and to a refund for the unused part of your subscription, or to compensation for reasonably foreseeable loss; for a failure that is not major you are entitled to have the problem fixed within a reasonable time, and to cancel and be refunded if it is not. These rights sit alongside the money-back guarantee in section 4, and where any part of these Terms conflicts with them, those rights prevail.

Subject to the consumer guarantees in section 8, and to the maximum extent permitted by law, FlexiChess will not be liable for any indirect, incidental, special, consequential, or punitive damages, or for loss of profits. Our total liability for any claim relating to the service is limited to the greater of the amount you paid us in the 12 months before the claim or USD 100.

The exclusion above does not cover direct loss of Your Content stored on our servers where that loss is caused by our failure to take reasonable care. In that case we remain liable up to the cap in this section, and section 8 still prevails over this section.

Data you keep on this device only — while signed out, before your email is verified, or in a collection over your plan’s cloud limit — lives in your browser; export anything important. We are not responsible for device-only data lost from clearing browser storage or device failure.

You may stop using FlexiChess at any time. We may suspend or terminate your access if you materially breach these Terms; we will tell you why and give you at least 14 days to put it right, unless the breach is causing immediate harm. If we terminate a paid subscription for any reason other than your breach — including shutting the service down — we will refund the unused portion pro-rata. Sections that by their nature should survive termination (such as content ownership, disclaimers, and liability limits) will survive.

If we terminate for breach, we will still refund the unused portion of any period you have prepaid, less any amounts you owe us and any loss the breach caused us. Either way, we will give you at least 30 days to export your data before it is deleted.

We may update these Terms as the product evolves. If we make a material change, we will give you at least 30 days’ notice by email before it takes effect; if you do not agree, you can cancel before it takes effect and we will refund the unused portion of any subscription pro-rata. Minor changes (like clarifications or descriptions of new features) take effect when posted, reflected by the “Last updated” date above. A change is never “minor” if it reduces what you get, increases what you pay, or narrows your rights or remedies; those always get the 30 days’ notice above.

These Terms are governed by the laws of Queensland, Australia, without regard to conflict-of-laws rules, and any disputes will be handled in the courts of that jurisdiction, except where local consumer law gives you other rights.

You may not transfer your account or your rights under these Terms to anyone else without our written agreement. We may transfer these Terms, and your subscription with them, to someone who acquires FlexiChess or substantially all of its assets, provided they take on our obligations to you under these Terms. We will tell you by email before that happens, and if you do not want to continue you can cancel and we will refund the unused portion of your subscription pro-rata.

If any part of these Terms is found unenforceable, it is read down as far as needed to make it enforceable, or removed if it cannot be — the rest stays in force. If we do not enforce a provision on some occasion, that is not a waiver of it or of any other provision.

Questions about these Terms: support@flexichess.com.