> For the complete documentation index, see [llms.txt](https://playbook.checkmate.live/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://playbook.checkmate.live/gameplay-and-features/ladders-and-tournaments/rating-system.md).

# Rating System

Checkmate uses the following ratings:

<table data-header-hidden><thead><tr><th width="166.33333333333331" align="center"></th><th width="160" align="center"></th><th align="center"></th></tr></thead><tbody><tr><td align="center"><strong>Rating</strong></td><td align="center"><strong>Code</strong></td><td align="center"><strong>Description</strong> </td></tr><tr><td align="center">Elo</td><td align="center">CM</td><td align="center">Players will be initially rated with the Glicko-2 rating system</td></tr><tr><td align="center">Elo</td><td align="center">FIDE</td><td align="center">The International Chess Federation Elo rating system. ACF and rated competitions will use this Elo score.  Federations who have differing rating systems will be accommodated if partnered.</td></tr><tr><td align="center">Elo</td><td align="center">CMX</td><td align="center">CMX is Checkmate's proprietary skill-based rating and pairing system for individual and team rankings. CMX will be running in the background during the Alpha phase. </td></tr><tr><td align="center">SPEEDPRO</td><td align="center">SP</td><td align="center">SPEEDPRO is a new game mode exclusive to checkmate. Details about this new mode will be released before season one. </td></tr></tbody></table>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://playbook.checkmate.live/gameplay-and-features/ladders-and-tournaments/rating-system.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.