1) Load songs
Paste YouTube URLs or IDs (one per line).
Fill in channel names for the bar chart race (optional — leave blank to skip).
| Thumbnail | Title | Channel name |
|---|
or: Load from playlist (YouTube API)
Requires a YouTube Data API key.
2) Run Elo tournament
Stage system: 450→225→112→56→20→8→final.
Each stage: 6 matchesPlayed (3 group appearances) before cutoff.
Groups of 3–4 normally; groups of 3 when ≤20 alive; 1v1 final when ≤8.
Elo: K decays from 32→6 as matches accumulate.
RD (uncertainty): starts at ±150, shrinks faster vs similar opponents.
Matchmaking: 70% Elo-close · 15% high-RD · 15% random.
No songs loaded.
3) Import / Export CSV
CSV columns: rank, id, title, url, elo, rd, matchesPlayed, eliminated
4) Bar chart race CSV
Columns: name · channel · thumbnail · match_0 · match_1 · …
Blank cells = song didn't play that match. Updated live in memory.
5) Cloud sync
Only used if this site is deployed with the included Cloudflare Pages Function + KV namespace (see README). Otherwise data just stays in this browser's local storage, same as before.
6) Edit data
Directly edit song titles, channels, Elo, RD, matches played, or eliminated status — no CSV round-trip needed.
Current match
No tournament in progress.
Load songs and press Start / Continue to begin.
Rankings
Sorted by Elo. RD bar shows uncertainty (green=confident, yellow=moderate, orange=uncertain).