Refined Leetcode is a Chrome extension developed by XYShaoKang that aims to enhance the experience of using LeetCode-cn for coding practice. With a range of useful features, this extension provides additional functionality to make the process of solving coding problems more efficient and enjoyable.

One of the standout features of Refined Leetcode is the inclusion of a timer on the problem-solving page. This timer is compatible with both the new and classic problem-solving layouts, allowing users to keep track of their time and improve their speed. Additionally, the extension provides predictions for contest rankings, making it easier for users to gauge their performance.

Another useful feature is the display of language icons on the contest rankings page, which helps users quickly identify the programming languages used by participants. Additionally, Refined Leetcode allows users to create a blacklist for posts on the homepage, enabling them to filter out unwanted content.

The extension also includes a sidebar for managing problem lists, making it easier for users to organize and track their progress. Furthermore, Refined Leetcode introduces a rating system for problems, allowing users to assign scores to different questions based on their difficulty or personal preferences.

For those participating in coding contests, the extension offers an option to disable keyboard shortcuts on the contest problem-solving page, preventing accidental keystrokes from affecting the competition.

Refined Leetcode provides a range of configuration options, allowing users to enable or disable specific features according to their preferences. Whether you are a beginner or an experienced coder, this extension offers valuable enhancements to the LeetCode-cn platform.