How lucky is too lucky?: The Minecraft Speedrunning Dream Controversy Explained
Why Hacker News recommends it
HN recommends it as an engaging lesson in probability and in how statistics can expose cheating.
What it is
Matt Parker analyzes the Minecraft speedrunning controversy in which Dream was accused of cheating via improbably lucky drops. He walks through the probability and the statistical arguments in the original accusation and the reply.
Recommended by 5 HN commenters across 5 different months, 2021 to 2025.
What Hacker News said
Strong rec wexq · 2021-05 · on “How Lucky Is Too Lucky in Minecraft?”
The article recommends watching the video by Matt Parker, and so do I. Great refresher on probability (or luck, if you will) For convenience: [this video]
Recommends teekert · 2021-09 · on “A layman’s guide to recreational mathematics videos”
Maybe nice to mention that Matt Parker's Stand-up Maths video on the cheating on a MiceCraft speed-run is really very nice [0]. It not only exposes the cheater, it also gives some intuition into negligible probabilities. [0]: [this video]
Recommends t_mann · 2022-09 · on “Dear Chess World”
The key point (in the end) seems to be that the odds for a streak like Niemann had are about 1 in 80k. Statistically speaking, I'd say that's a long shot from a smoking gun. Here's a good rundown of a case where a cheater is considered to have been exposed by statistical evidence, but those odds were on a completely different scale, 10^22: [this video] Basically the mistake that is easy to make is that we shouldn't ask: "what is the probability that Hans plays five tournaments like that in a row?", but "what is the probability that someone will play five tournaments like that in a row?". Even if we correct for the fact that there are probably more Minecraft speedruns happening than GM tournaments
Recommends uolmir · 2025-02 · on “Diablo hackers uncovered a speedrun scandal”
There have been several of these deep dives into manipulated speed runs and they seldom disappoint. Since we are on HN, I'll mention another mathy one that was summarized by Matt Parker: [this video]
Recommends contravariant · 2025-03 · on “Napkin Math Tool”
I think the problem is that below 10^-6 there's a pretty broad range of magnitudes that are effectively 'happens to n people every k years (if they try very hard)'. Which makes them rare but not impossible, which is annoying because you can't rule it out but you can't expect to easily reproduce it either. That does tend to be the best way to think about those probabilities. For any probability you can make it happen If you try enough times or with enough people you can try to force it to happen. Below -6 is a pretty wide range of stuff you can just barely make happen if you have enough people, enough tries and enough time. It's only once you get to the 'wouldn't happen to 10^10 people in a m
Cites robga · 2021-05 · on “How Lucky Is Too Lucky in Minecraft?”
BBC's radio show More or Less did a great piece on this recently. [LINK] It is related to Matt Parker's youtube video [this video] which has already been mentioned on this post.
Cites Ygg2 · 2022-05 · on “We think this cool study we found is flawed. Help us reproduce it”
It can still be a fair die. The context implies it's not, but it's only unlikely, not impossible. See [this video] It introduces a 10 billion human second century i.e. 3.1 x 10^19. If your chance times it is greater than 1 then it's definitely plausible to be done by someone, somewhere.