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Rules

Format Overview

The tournament has two phases: a 7-round Swiss stage, then a single-elimination bracket of 64. All matches are played in TETR.IO rooms.

Register 7-Round Swiss Top-64 Bracket Champion

Swiss Stage (7 Rounds · FT5)

Every round is FT5 — first to 5 wins.
Three losses eliminate a player from pairing; if bracket spots remain, eliminated players fill them by ranking.
Pairing Rules
Players are grouped by win count; players on the same record face each other first.
No rematches across the whole Swiss stage.
Odd groups pull in players from lower groups to fill up.
The leftover player receives a bye — counts as 1 win, but not into SOS.
Ranking: wins first, then SOS (sum of all opponents' wins), then head-to-head result.
After 7 rounds, the top 64 advance by ranking (non-eliminated players first).

Bracket Stage (64 · Single-Elim)

Top-64 seeds are placed in a snake bracket: 1v64, 32v33, 17v48, 16v49…
Rounds down to the quarterfinals are FT7 (first to 7 wins).
Semifinals and finals are FT11+2 (first to 11 wins).
If a match reaches 10–10, you must win by 2 games (12–10, 13–11, … no cap).
Single elimination; the winner advances until a champion is decided.

Match & Time Rules

The referee sets a time window per round (default 15 min); the deadline is generated with each pairing.
Finish your match before the deadline; the referee rules on unfinished matches.
Match results are recorded automatically by the bot; winners, advancement and standings are computed from the scores.

Player Guide

After approval, join the tournament group for updates (QQ group: 1079244077; Discord group: discord.gg/pfNTgUUmX).
Join your TETR.IO room on time; notify the referee in advance if you cannot play.
Cheating (boosting, scripts, intentional disconnects) leads to disqualification.

About Us

Celestial Cup is an online tournament for TETR.IO players, using a Swiss + single-elimination format, offering block fans a fair stage to compete and reach for the sky.

Folx Tournament Organizer

All matches on TETR.IO online Bilingual (CN/EN) live broadcast