v2.3.1

• Added contest ranking tiebreak: by last submission time.

v2.3.0

• Store and fetch test cases in GitHub repo.
• Added extra settings.
• Update countdown and rankings during contest.

v2.2.0

• New judge server, thanks Snuny.
• Add Chess page.
• Update all frontend dependencies.
• Add attempts to task lists.
• Add monthly and weekly leaderboards.
• Implement the Open Graph protocol.
• Fix inability to send large test cases to judge server.
• Add logos for programming languages.
• Switch from SQLite3 to MySQL (AWS RDS).
• Implement grader functionality.
• Add subtask score table.
• Add file upload for submission.
• Add editorial page in contests.
• Switch from MathJax to KaTeX to render math.
• Add test case descriptions.

v2.1.2

• Revamp Buy Account page.
• Scoring mode and associated contests are shown at the bottom of task page.
• Changed viewing permissions for contest pages.
• Added Python exception page.
• Added a multitude of information to user page.

v2.1.1

• Correct display of contest results.
• Implement rate-limiting. (30 HTTP requests/min, 1 submission/20s)
• Add Changelog.

v2.1.0

• Migrated from Flask to Quart (synchronous to asynchronous).