Licences and credits

Every dataset, word list and image that a game uses is listed here with its licence, and where a game uses none, it says so. Anything not named below is generated by the site itself. If you think something is missing or wrongly credited, say so and it will be fixed or removed.

Games

Game rules and mechanics are not protected by copyright in the UK or the US, and several games here are our own build of a familiar idea. What is protected is the expression: names, artwork, text and layout. We use none of anybody else’s. Every game on this site is written from scratch, given its own name, and carries no trade mark belonging to anybody else.

Data

• Five Marks uses word lists derived from ENABLE, the Enhanced North American Benchmark Lexicon, which its authors released into the public domain. The selection, the cut between answerable and merely allowable words, and the ordering are ours. No other game’s answer schedule is copied or derived from.
• Rungs uses a four-letter subset on the same basis.
• Gridlight’s pictures are drawn by us, one square at a time. Ordinary objects only: no logo, no character and no trade mark belonging to anybody appears in any of them.
• Ballpark asks about physical and mathematical constants, chosen so that no answer drifts and none of them is about a living person.
• Reckoning, Cracker, Digit Drop, Sixes and Sweep use no external data at all. Every board is generated and solved by the site itself.

Software

Built with Next.js, React, Tailwind CSS, PostgreSQL and Better Auth, each under its own open source licence. The type is Big Shoulders, Archivo and JetBrains Mono, all open source, and all served from this site rather than fetched from anybody else: no third party sees your browser asking for a font.