Predicted rating changes, minutes after the contest ends

See your new contest rating
before LeetCode publishes it.

Pick a recent LeetCode weekly or biweekly contest, and we'll fetch every participant's standing, run the same Elo-based algorithm LeetCode uses, and show you the predicted rating delta — for any user, the entire leaderboard, or your watchlist.

Active

LeetCode

Weekly & biweekly contests. Predicted deltas for every participant, single-user search, and watchlist.

Phase 2

Codeforces

Built on the same adapter contract; will use the official contest.standings and contest.ratingChanges APIs.

Phase 2

CodeChef

No official API, so we'll scrape rankings pages with a polite rate-limit. Same UI, same DB, same watchlist.

Step 1

Pick a contest

We list the most recent LeetCode weekly and biweekly contests with their status. Click one to predict.

Step 2

First click does the heavy lifting

We fetch every participant's pre-contest rating and run the Elo expected-rank computation. Takes 30–90s on the first request — you'll see live progress.

Step 3

Everyone else gets it instantly

Results are cached in Postgres. Single-user search, full leaderboard, and watchlist all read the same prediction. Hit Recompute to refresh.