We did a few tests and it seems to work very well 
Here are the things we noticed:
- For the organiser (I don’t know if for others too) the first players are 6k. After the first move their rank becomes “?”.
- If a player loses by disconnection, the system says “‘playername’ left: they resigned”
- If a player is eliminated/leaves, the rengo he was in keeps appearing in his active games
- If a player is eliminated/leaves, you have to refresh the page to see the correct number of players in the game’s info
- @Samraku had to refresh to dismiss the timeout timer sitting at 0.00 seconds
- This game stuck twice for me: once while playing and once as a spectator. I couldn’t read any new messages, not even the ones I wrote, and the time wasn’t running. Refreshing the page fixed it.
The chat before the game seems to work perfectly.