Terms of use

In short

• Using the registry is free. You need an account only to vote, propose a problem or submit a contribution.
• What you submit stays yours. You let us publish it, under the names you give, and keep it in the public record.
• One account per person, real evidence, no spam, nothing unlawful.
• A verdict is the review board's judgement of the evidence, not a guarantee.
• Austrian law applies. As a consumer, you keep the protection of the law where you live.

Who we are

UNSOLVED, at unsolved.how, is run by TEDAI GmbH, Praterstraße 32/2/23, 1020 Vienna, Austria (details in the imprint). These terms apply whenever you use unsolved.how or any site under it, such as a conference site. What we do with your data is on the privacy page.

For questions about these terms, and as our point of contact for users and authorities under the EU Digital Services Act, write to contact@unsolved.how in English or German.

What UNSOLVED is

UNSOLVED is a public, numbered registry of open problems in AI. Using it is free: anyone can read it and follow problems by email, without an account. With an account you can also vote for problems, propose new ones and submit contributions.

UNSOLVED also has a global conference, which we run, and local chapters, which their hosts run. Both are covered below.

Registry numbers are permanent: once given, a number stays with its problem and is never reused.

We keep improving the site, so features may change, and we can't promise it is always available. If we ever close UNSOLVED, we will tell account holders by email at least four weeks before.

Your account

• You sign in with a code we email you, a passkey, or your ORCID, Google or GitHub account. There are no passwords.
• You need to be at least 14.
• One account per person. Don't sign up in someone else's name or pretend to be someone you're not.
• Keep your email and your devices safe: whoever can read your email or use your passkey can sign in as you. If you think someone else is using your account, tell us.
• You can delete your account at any time in your account settings.

Votes

Each account has one vote per problem, and every vote shows in the problem's count straight away. The Movement ranking orders problems by recent activity and by votes, and counts only votes from accounts with a verified email address that are at least seven days old. That keeps a burst of new accounts from moving the ranking.

Don't buy, sell, trade or automate votes, and don't create accounts to vote. We may leave out or remove votes that don't come from people voting for themselves.

Proposals and contributions

A proposal suggests a problem for the registry. It stays private until an editor looks at it. Then it either joins the public pool, unnumbered, showing "Proposed by" with your account name, or is declined. Only curated problems get a number. The editors decide which, and may restate a proposal, combine it with others or use parts of it in a problem's statement.

A contribution is work that moves a numbered problem: a paper, preprint, code, data, a benchmark result or a demonstration others can reproduce. Every contribution needs a link to that artifact; claims without artifacts are not reviewed. A contribution is visible only to you until the review board triages it. A published contribution shows the names you give, your summary and the link, and if it solves a problem, the problem names you as its solvers.

When you submit a proposal or a contribution, you confirm that:

• it is your work, or you have the right to submit it, and everyone you name has agreed to be named;
• it is accurate, and the artifact shows what you say it shows;
• it contains nothing you aren't allowed to share, such as someone else's confidential information or personal data.

What you keep, and what you let us do

You keep every right in what you submit, and in your artifacts, which stay wherever you host them: we store only the link.

You allow TEDAI GmbH to store, show, copy and publish what you submit, free of charge, worldwide, without time limit and not exclusively: on UNSOLVED, in our emails, feeds and link previews, when we report on the registry, and on stage at our events. For proposals, this includes working them into the registry's own statements. We may shorten or format what you submit to fit the page, but we won't change what it says.

Published contributions and pooled proposals are part of the public record, so they stay when you delete your account, no longer linked to it.

Verdicts

Editors screen what is submitted: they move new contributions into triage, pool or decline proposals, and remove spam. The review board reviews contributions, verifies or declines them, and decides each problem's status: open, in progress or solved. Only a verified contribution can move a problem, and every verdict comes with a public reason on the Progress timeline.

A verdict is the board's judgement of the evidence against the problem's published criteria. It is not a certification or a guarantee, and not advice for any decision you make. Submitting gives you no right to a number, a review by a certain date or a particular verdict.

If you think a decision about your proposal or contribution is wrong, write to contact@unsolved.how and say why. We will look at it again and tell you what we decided.

What's not allowed

Don't use UNSOLVED to:

• post anything unlawful, or anything that infringes someone else's rights, such as their copyright or privacy;
• harass, threaten or demean anyone;
• advertise, spam, or keep submitting claims without evidence;
• pretend to be someone else, or name authors who haven't agreed;
• game the ranking with extra accounts or with automated or bought votes;
• get around rate limits or the human check, overload the site, or try to reach anything that isn't meant for you.

Reading the public pages is welcome, by people, search engines and AI tools alike; just don't overload the site. If you find a security flaw, please tell us first, at contact@unsolved.how.

How we moderate

People decide on what you submit: our editors and the review board. No algorithm judges your proposals or contributions. Automatic checks only keep bots out: rate limits and the human check on our forms.

If something breaks these terms or the law, we can decline it, remove it, leave votes out of the ranking, or suspend or close an account. We choose what fits the case and keep everyone's rights in mind, including freedom of expression and of research. We close accounts only for serious or repeated breaches, and usually warn first.

When we remove something you published or restrict your account, we tell you why and how to ask us to look again, unless it is spam or the law doesn't allow us to.

Reporting illegal content

If you think something on UNSOLVED is illegal or breaks these terms, email contact@unsolved.how with:

• the link to it;
• why you think it is illegal or breaks these terms;
• your name and email address;
• a statement that you believe, in good faith, that your report is accurate and complete.

We confirm that we received it, look at it promptly, and tell you what we decided and why.

Our content, and other people's

The registry's statements, criteria and timeline, the blog, the site's design, and the name UNSOLVED and its mark belong to TEDAI GmbH or to the people who wrote them. You're welcome to quote problem statements, link to them and discuss them, with credit to UNSOLVED and a link to the problem's page. Using the name or the mark in a way that suggests we endorse you, or that you speak for UNSOLVED, needs our written agreement.

We link to and summarise work published elsewhere: in a problem's "Outside the registry" tab, on the blog and in our emails. We check what we publish, but the original is the authority, and we aren't responsible for other sites.

The conference, partners and chapters

We run the global conference ourselves. Tickets come with their own terms, which you'll see before you buy and which apply alongside these.

Organisations can support UNSOLVED as patrons or partners: of a problem, a category of problems, or the conference and events. That is paid, under a separate written agreement. It never buys a number, a place in the ranking or a verdict, and patrons and partners have no say in a problem's statement, its reviews or its status.

Chapters are organised by local hosts, independently and on their own responsibility. At a chapter event the host is the organiser, not TEDAI GmbH: the host is responsible for the event, its venue and anything you agree with them. Hosts use the UNSOLVED name with our permission, under terms we agree with each of them.

An enquiry sent through the site commits neither you nor us to anything.

Liability

Using the site and the registry is free. We are liable without limit for damage we cause intentionally or through gross negligence, and for injury to life, body or health. For slight negligence we are not liable, except where the law doesn't allow this to be excluded, such as under the Product Liability Act. Paid agreements, such as conference tickets and patronage, set out liability of their own.

The registry, its verdicts and our summaries are information, not professional advice. Check the original work before you rely on it.

Ending your account

You can stop using UNSOLVED and delete your account at any time. We may close an account for a serious or repeated breach of these terms. Either way, what is in the public record stays.

Changes to these terms

When the site or the law changes, we may update these terms. We will email account holders about changes that affect them at least four weeks before they apply. If you don't agree, you can delete your account before then; if you keep using it, the new terms apply from that date. The date at the top shows the current version.

Law and courts

Austrian law applies, without its conflict-of-law rules and without the UN Convention on Contracts for the International Sale of Goods. If you use UNSOLVED as a consumer, you keep the protection that the mandatory law of your country gives you.

For disputes with businesses, the competent court in Vienna has jurisdiction. As a consumer, you can also take us to court where you live, and we can take you to court only there.

If any part of these terms is invalid, the rest stays in force.