Atlas FAQ — portals, print & freemium

TappyPotato is a curated atlas of logic-puzzle types and the sites where you can play them. It focuses on pure deduction: rules, how to start, common stalls, and outbound links to third-party play sites. The house line is simple — the answer is not the point; thinking is. We do not run ads inside puzzle engines here, because we do not run engines here.

Portals (19 sites on the category page) are cross-genre hubs — sites that carry many rule sets under one interface. Examples in the index include BrainBashers, Janko.at, Conceptis, and other multi-type doors. Use them to sample Japanese grids and arithmetic types before you commit to a specialist list.

Printable & PDF lists archives that publish downloadable grids. Krazydad is the booklet people name first: PDF sets with answers, sized for ordinary printer paper, no account required. Check page count and answer keys before you print a class set. Rights stay with the authors — do not re-upload their files.

Freemium means the linked site offers a usable free layer (often a daily grid, a limited archive, or a free mode) and also sells extras. Those extras vary by host: fewer ads, more archives, coaching metrics, or physical goods. The tag is not a warranty of “unlimited forever free play” — open the card and verify the paywall yourself.

Instant fill tools exist elsewhere. This atlas points you at rule pages, step explainers, and communities where the path matters. If you only need a completed grid, a brute-force paste will do that; it teaches you nothing.