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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
499•klaussilveira•8h ago•138 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
836•xnx•13h ago•503 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
53•matheusalmeida•1d ago•10 comments

A century of hair samples proves leaded gas ban worked

https://arstechnica.com/science/2026/02/a-century-of-hair-samples-proves-leaded-gas-ban-worked/
110•jnord•4d ago•18 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
164•dmpetrov•8h ago•76 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
166•isitcontent•8h ago•18 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
59•quibono•4d ago•10 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
279•vecti•10h ago•127 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
339•aktau•14h ago•163 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
222•eljojo•11h ago•139 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
332•ostacke•14h ago•89 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
421•todsacerdoti•16h ago•221 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
34•kmm•4d ago•2 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
11•denuoweb•1d ago•0 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
360•lstoll•14h ago•248 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
15•gmays•3h ago•2 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
9•romes•4d ago•1 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
58•phreda4•8h ago•9 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
209•i5heu•11h ago•156 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
33•gfortaine•6h ago•8 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
121•vmatsiiako•13h ago•51 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
159•limoce•3d ago•80 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
257•surprisetalk•3d ago•33 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1013•cdrnsf•17h ago•422 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
51•rescrv•16h ago•17 comments

I'm going to cure my girlfriend's brain tumor

https://andrewjrod.substack.com/p/im-going-to-cure-my-girlfriends-brain
93•ray__•5h ago•43 comments

Evaluating and mitigating the growing risk of LLM-discovered 0-days

https://red.anthropic.com/2026/zero-days/
44•lebovic•1d ago•12 comments

WebView performance significantly slower than PWA

https://issues.chromium.org/issues/40817676
10•denysonique•5h ago•0 comments

How virtual textures work

https://www.shlom.dev/articles/how-virtual-textures-really-work/
35•betamark•15h ago•29 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
81•antves•1d ago•59 comments
Open in hackernews

Show HN: Build your own Bracket City puzzle

https://builder.bracket.city
32•brgross•3mo ago
Hi HN — Bracket City is the word puzzle game I made earlier this year and (in part thanks to this community, see https://news.ycombinator.com/item?id=43622719) managed to license to the Atlantic in April.

The game has been growing a lot and I wanted to share the latest: a tool that lets anyone make a Bracket City puzzle — specifically a “Bracket Suburb”!

I made this tool to help me construct puzzles, and I’ve been using it every day for months.

After the Atlantic launch, I started to get the occasional inquiry about whether there was a way to make your own puzzle. One guy wanted to make a Bracket City puzzle part of a puzzle hunt he made to propose to his girlfriend (he did it!), and that convinced me it would be fun to make something publicly available.

I got the Atlantic on board with the idea, and we are launching it today with an "example" custom puzzle: a Halloween/horror-themed puzzle by my pal Wyna Liu of NYT Connections fame.

https://suburbs.bracket.city/wyna

And we've got few other fun "celeb" puzzles lined up for later this year.

The thought is that folks can use the builder to make custom puzzles for birthday wishes/event invites/insults/proposals/break ups in addition to “normal” Bracket City puzzles.

I'm also hoping to learn more about the potential of the format – crossword puzzles have benefited so much from the creativity of constructors – I'm hoping bracket puzzles do the same.

The good news is that it’s way easier to construct a bracket puzzle than a crossword. Once you try it, you’ll see why: you have many more degrees of freedom. In a crossword, each added word increases the level of constraint exponentially — every new entry sharply reduces the remaining options for completing the grid. Bracket puzzles are the opposite: as you add clues, you expand the available fodder for new ones.

Anyway, I would love any/all feedback and to try puzzles created by folks here. I’m hoping we will figure out a way to highlight the best community puzzles on the Atlantic soon!

PS and please keep playing the main game / sending me feedback / denouncing me on the subreddit

Comments

knuckleheads•3mo ago
Very nice! I had been wondering you constructed these. I've enjoyed playing them! A question I would have is how meta do you think can you get with these hints? In crosswords, you often see a lot of references to other clues in the crossword. And so I wonder, with bracket city puzzles, it seems like it would be hard to dip into that self reference, as the tree structure of the clues makes it hard to reference other clues and there's no labels like 2 across you could use.
brgross•3mo ago
I've played around a little with this but never found a way to do it that I thought worked for the Atlantic puzzle.

Here's a very bad example I just made of one way you might use emoji to make inter-clue references:

https://suburbs.bracket.city/5Q1O24

too confusing/unsatisfying right now -- but I made the builder partly so that people would experiment...I bet someone will figure out something good!

knuckleheads•3mo ago
Yeah I can’t say the emoji linkage do it for me. Perhaps, though, what about color highlights? Sven’s Sudoku Pad lets you apply colors to cells and this is used to great effect during solves on cracking the cryptic. Flipping that from solving to authoring, if you wouldn’t mind adding the option to allow highlighting of clues from some simple preset color list, that might be able to give people some options.
knuckleheads•3mo ago
Ah, in fact, could you add three options: 1. Turn off the display of brackets. 2. Pick colors for each clue. 3. Allow the puzzle to be displayed with a preset fixed width.
fakedang•3mo ago
I just want to let you know that I play Bracket City every day. First thing in the morning after waking up and showering is playing Bracket City. :)

Granted, I've been having quite a shit streak of late.

jaspday•3mo ago
I started playing Bracket City after it was featured on HN, and when I learned about the build-your-own feature (through playing the game, as it happened) I built one and shared it with my family. It was a lot of fun! Honestly, I've wanted to make my own puzzles ever since I first played. Actually doing it was like rubbing catnip on the part of my brain that likes picking words apart and putting them back together. Thank you for releasing this!
greenpizza13•3mo ago
Love this. A head’s up, on mobile there is no way to enter a space. The puzzle maker let me add a space.
brgross•3mo ago
yeah...working on adding a space bar/key to mobile suburbs solver!