@redblobgames

I explain algorithms and math with interactive web pages (incl. pathfinding, hexagons, procgen maps, voronoi). Wrote Solar Realms Elite; helped w/@rotmg_news

 Silicon Valley CA & Seattle WA
redblobgames.com/
Joined January 2012
  • Tweets10.9K
  • Following17
  • Followers19K
1.2KMedia
I've posted to Stack Overflow, Reddit, Twitter instead of Quora, Pinterest, Facebook, because my posts are readable by anyone, not only logged in users. As site rules change, it changes my motivation to post. Also: I blog at simblob.blogspot.com/ ; it has RSS too
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New talk! About the divided human & agent worlds, boundary objects, and building thicker interfaces I've been exploring how to improve "planning", aka. deciding what agents should build, how you want it built, & making the whole team part of that process maggieappleton.com/planning-…

Planning with Agents: Divided Worlds, Boundary Objects, and Thicker Interfaces

Why we need richer, thicker interfaces and better boundary objects for collaborative planning with agents

maggieappleton.com
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Fermions are nouns Bosons are verbs What are the adjectives? adverbs? articles? prepositions?
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A long time ago I lost the source to a game I made. Joe has reverse engineered it. I've just started reading the code and … wow, it's bringing back so many fond memories!
Joe Shaw@joeshawOct 20
With all the reverse engineering of games going on, I decided to attempt it on a game from my youth: the DOS BBS door game Solar Realms Elite. The original game's source code was lost in 1996. github.com/joeshaw/sre-recon…

GitHub - joeshaw/sre-reconstructed: Solar Realms Elite, reverse engineered and reconstructed

Solar Realms Elite, reverse engineered and reconstructed - joeshaw/sre-reconstructed

github.com
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Although local variable names won't match, it's been nice to see the algorithms for combat and game balance. I had forgotten so many things about how everything worked!
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Omar Rizwan@rsnousOct 15
similar to how I feel about compilers sometimes: they do all this internal stuff for their own work, tracking provenance, eliminating dead code, but the interface with the human only exposes a fraction of it (whatever can become an 'error' or 'warning')
pentagonya@pentagonyaOct 14
Replying to @rsnous
Smartphones invented a to-do list for computers (the notifications drawer). It's just never a tool of the human. You can't save or reorder notifications and see a history of them. You can't create your OWN notifications.
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example.com/
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This site has been around forever. But just updated, seen from the HTTP header: Last-Modified: Mon, 28 Sep 2026 16:19:32 GMT Also, it has javascript now!
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New blog post: redblobgames.com/blog/2026-0… I was looking at assigning "a" vs "an" articles for English nouns (for procgen purposes), and fell into a rabbit hole…
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Matt DesLauriers
@mattdeslSep 18
does Jev understand colour? incredible model, very cheap and fast. definitely feels like a leap forward for creating new UX/UI paradigms on top of modern language models.
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✍️ Playing with programmable highlighters, e.g. * green highlight on a citation -> finds and prints the cited paper * orange highlight on a claim -> prints a skeptical fact-check Extends naturally to "if I write a comment like 'Is there more recent work?' and circle it in purple, send the comment with surrounding context to an agent"
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David Louapre
@dlouapreSep 11
Understanding the Navier-Stokes blow-up? I created a new Tangible lesson to explain the concept of blow-up: from ordinary differential equations, to gravity, heat equation…and Navier-Stokes ! huggingface.co/spaces/dlouap…
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harley turan
@hturanSep 6
turns out 60hz hi-dpi eink screens feel pretty magical
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max@maxbittkerSep 4
GPT-5.6 Astra just exploded Runescape bench scores, setting huge records on 10/16 skills. Huge outlier performance.
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New post by me, about the flaw in bezier curves that most drawing apps ignore: acko.net/blog/curvature-bezi…

Curvature Beziers

Improving on a timeless recipe

acko.net
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kciter.so/posts/the-expensiv…

The Browser's Main Thread Is Expensive | kciter.so

What comes to mind when you hear "frontend optimization"? For most of us it's things like reducing network requests, shrinking the bundle,…

kciter.so
Sunhyoup Lee@kciterJul 20
브라우저의 메인 스레드는 비싸다 kciter.so/posts/the-expensiv…

브라우저의 메인 스레드는 비싸다 | kciter.so

프론트엔드 최적화라고 하면 무엇이 떠오르는가? 대체로 네트워크 요청을 줄이거나 번들 크기를 줄이고 캐시를 잘 쓰는 일을 떠올린다. 그 외에는 리렌더링 줄이기나 리소스를 불러오는 타이밍쯤이 떠오를 것이다. 보통 메인 스레드를 떠올리기는 쉽지 않은데…

kciter.so
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1987 😏
Jeff (Hot Type) Jarvis
@jeffjarvisAug 29
Once Seen as a Sure Thing, Computer Science Has Lost 53,000 Majors or 8.4% chronicle.com/article/once-s…

Once Seen as a Sure Thing, Computer Science Has Lost 53,000 Majors

But engineering and health professions saw big enrollment gains last year, according to new data.

chronicle.com
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BorisTheBrave@boris_braveAug 29
I'm using a lot of Lean at work. They've recently added Float.Model which let's you prove things about IEEE floats, so I tried out Quake III's inverse square trick. github.com/BorisTheBrave/inv…

GitHub - BorisTheBrave/invsqrt: Lean proof of the fast inverse square root proof

Lean proof of the fast inverse square root proof. Contribute to BorisTheBrave/invsqrt development by creating an account on GitHub.

github.com
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Stas Bekman
@StasBekmanAug 14
This is very cool, python 3.14+ allows you to attach to a running python process with pdb w/o needing any code instrumentation For details see: github.com/stas00/the-art-of…
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John Nelson@John_M_NelsonAug 13
the Spilhaus "one world ocean" coordinate system with Natural Earth base.
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Omar Rizwan@rsnousAug 12
Replying to @golan @Lauracsc_ @naso @meodai @colinreid_me
@maxbittker maxbittker.github.io/broider…
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