---
title: Challenge solve rate (CSR) · Cloudflare Fundamentals docs
description: The challenge solve rate (CSR) is the percentage of issued challenges — Interactive Challenge, JS Challenge, or Managed Challenge actions — that were solved.
lastUpdated: 2025-03-31T19:48:54.000Z
source_url:
  html: https://b37efaf9.preview.developers.cloudflare.com/fundamentals/security/cloudflare-challenges/challenge-solve-rate/index.md
  md: https://b37efaf9.preview.developers.cloudflare.com/fundamentals/security/cloudflare-challenges/challenge-solve-rate/
---

The challenge solve rate (CSR) is the percentage of issued challenges — Interactive Challenge, JS Challenge, or Managed Challenge actions — that were solved.

```sql
CSR = number of challenges solved / number of challenges issued
```

This metric helps you evaluate your rule's effectiveness, as well as whether you need to make any adjustments to the rule's criteria or action. Rules in Challenge mode will start generating Challenge Solve Rate data (CSR) which indicates the false positive percentage.

You can find the CSR of a rule by going to its corresponding dashboard page:

* For [custom rules](https://developers.cloudflare.com/waf/custom-rules/), go to **Security** > **WAF** > **Custom rules**.
* For [rate limiting rules](https://developers.cloudflare.com/waf/rate-limiting-rules/), go to **Security** > **WAF** > **Rate limiting rules**.
