📖 How to use (first time)
No sign-up needed. Just remember three things.
- Tap “Choose a name” at the top of Home and enter your child's nickname (it stays on this device only)
- Press “Start practice” → the first 20th Kyu problem. Type the answer and it is marked automatically; a wrong answer shows the bead move that most likely went wrong
- 3 problems a day is enough. Open it again tomorrow and Solomon's story moves on
Still stuck? Email [email protected] (English or Japanese).
🔄 If the screen looks wrong
If you still see an old screen after a fix, a button does not respond, or pictures are out of place, the browser is almost always showing a copy it saved earlier. Press the button below, or reload using the steps for the app you are using.
1. Press this first
Version on this screen: …
2. If you opened it from LINE
- Tap "︙" at the top right (or "…" at the bottom right)
- Choose "Open in another app", "Open in Safari" or "Open in Chrome"
- In that browser, add it to your home screen so you can open it directly next time
The browser inside LINE can keep showing the page exactly as it was the last time. Opening it in a normal browser is the surest fix.
3. Safari on iPhone
- Pull the page down from the top (reload)
- If that does not help: close the tab and open the page again
- If you open it from a home-screen icon, close the app once (swipe up) and open it again
4. Chrome on Android
- Pull the page down from the top (reload)
- If that does not help: "︙" at the top right → "History" → "Delete browsing data" → tick only "Cached images and files" → Delete
5. If it still does not work
Email [email protected] and tell us which screen it happened on, and which device (iPhone / Android / computer) and app (LINE / Safari / Chrome) you used. A screenshot helps us fix it faster.
6. On a Windows PC: install it as an app
Soroban Kingdom is also on the Microsoft Store (free). The Store version opens in its own window and always loads the latest screens, so the problems above are less likely to happen.