Details to record
- Book edition and printed puzzle label, or the known sample ID
- What you expected and what happened
- Your browser and device type
Do not include passwords, payment details, or other account information.
Help
Help and corrections.
Find answers about saved progress and game controls, then note the puzzle details we will need if something looks wrong. Our public support contact is not configured yet.
Practice questions
Will progress be saved?
Yes. Progress is stored in this browser on this device. Clearing browser data, using private browsing, or switching devices may remove or separate it. Progress is not synced to an account.
Can I use the site offline?
A sample that is already loaded can remain playable if the network drops. A first visit or a sample that has not loaded still needs the site files, so offline access is not guaranteed.
Where are the keyboard controls?
Move through the grid with the arrow keys. Enter digits with 1–9, use Backspace or Delete to erase, and press N to switch Notes mode. The on-screen controls remain available as well.
Errata
Correction information
No confirmed corrections have been published. A searchable correction register and public support route will be added before the book or site is released. Until then, this page is guidance only and does not accept reports.