Terms

Using the site

spheromino.com is provided as-is for your personal enjoyment and education. Please don't try to break, overload, scrape at scale, or misuse the site.

Free puzzles

The free puzzles, the science pages and the segment reference are free to view, print and share for personal and educational use (for example at home, in a classroom, or a club). Please keep attribution to spheromino.com and don't resell them.

The brochure (paid)

Buying the brochure gives you a personal licence to download, print and use the PDF for your own puzzling and teaching. Please don't redistribute, resell or publish the PDF or its puzzles as your own. One purchase, yours to keep.

Purchases & the merchant of record

Paid products are sold and delivered by Lemon Squeezy as the merchant of record. When you buy, you also agree to Lemon Squeezy's checkout terms. Billing, taxes and receipts are handled by Lemon Squeezy. See our refunds page for returns.

No warranty

The puzzles are made with care and each brochure puzzle is verified to have a unique solution, but the site and files are provided without warranties. Jakub Mráček isn't liable for indirect or incidental damages arising from use of the site or files, to the extent allowed by law.

Changes

These terms may be updated as the project grows. The date below shows the current version.

Contact & law

Questions? jakub.mracek@gmail.com. These terms are governed by the laws of the Czech Republic, without affecting any mandatory consumer rights you have where you live.

Last updated: 26 August 2026