You ain't the only one who's removed the rate limits lol. Some of these queens are clearing a whole board in like 3s, must've written something to keep a piece selected. This is turning into a race to the godliest piece hackathon.

The rate limits aren't that aggressive and have a decent amount of burst, you can get about 10 moves done in 1 second before you hit them and start getting throttled[1]. And of course you can run multiple clients (I account for this too, but I'm not that aggressive because I don't want to punish many people NAT'd behind a single IP)

[1] down to something like 3/sec?

I figured the multiple people per ip would be an issue, was wondering if that might be at play here. I thought you said it was already at 3-4/s and I doubted it based on some of what I'm seeing. 10/s tracks a little better.

As to what you should change, I can't say. It's in the wild now lol.

Yea seems the rate limit should be stricter, I made a quick script to do 1 move (capture) every 150ms, doesn't seem to get throttled.

I like how generals.io did it where they explicitly made a bot only server/version.

We definitely have some cheaters, playing as the other color. Thought I saw it last night but I know I saw it today. I think I saw vindictive use of it too, both times. One black fortress was destroyed and next thing you know the nearest white fortress found its pieces moving into the worst possible positions, often next to a waiting black bishop or rook. I'm not sure how exactly you handle the colors, but in a world where I can RDC onto a dozen computers on a half dozen continents in seconds I suppose this was inevitable.