# The puzzle game
***
Each puzzle is a QR code image sliced into a 3×3 grid. Eight tiles can be moved; one slot is empty. Slide tiles into the correct order before the timer runs out.
**Game rules**
* Tiles can only slide into the empty adjacent slot — up, down, left, right, no diagonals.
* The puzzle is solved when all tiles are in the correct order.
* Winning within the time limit earns a $SCAN prize based on your current level.
* Failing to solve before the timer expires uses the attempt with no reward.
* Every puzzle played on a token with an active Scan Mode campaign contributes to its progress, regardless of outcome.
### **How a puzzle session works**
1. A player opens a puzzle for a token.
2. A QR puzzle is generated.
3. One play is consumed from the active pack for that token.
4. The player solves before the timer ends — or the attempt expires.
5. The result is recorded and rewards, progression, and analytics update.
A session can end as a win, loss, timeout, or invalid. All outcomes are recorded and affect player history, leveling, and campaign eligibility checks.
### Where to play
QRbase is available as a `Farcaster mini app` and a `Web app` at qrbase.xyz. The QR image embedded in each puzzle is styled with a randomly selected listed partner's token logo.
{% hint style="info" %}
The QR image embedded in each puzzle is styled with a randomly selected listed partner's token logo.
{% endhint %}
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