Show HN: Swarm – Program a colony of 200 ants using a custom assembly language
145 points
12 hours ago
| 19 comments
| dev.moment.com
| HN
We built an ant colony simulation as an internal hiring challenge at Moment and decided to open it up publicly.

You write a program in a custom assembly-like (we call it ant-ssembly) instruction set that controls 200 ants. Each ant can sense nearby cells (food, pheromones, home, other ants) but has no global view. The only coordination mechanism is pheromone trails, which ants can emit and sense them, but that's it. Your program runs identically on every ant.

The goal is to collect the highest percentage of food across a set of maps. Different map layouts (clustered food, scattered, obstacles) reward very different strategies. The leaderboard is live.

Grand prize is a trip to Maui for two paid for by Moment. Challenge closes March 12.

Curious what strategies people discover. We've seen some surprisingly clever emergent behavior internally.

onair4you
3 hours ago
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TheAceOfHearts
6 hours ago
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That's really cute, it reminds me that Will Wright (creator of The Sims) has referenced this book "The Ants", by Bert Holldobler in multiple occasions as a key inspiration for his games (and in particular SimAnt) and systems thinking. Did you come across that during your research phase or had you not heard about it? I haven't read it yet, but maybe someday I'll get around to it.
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lightamulet
1 hour ago
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Hey, I'm the one who built this particular challenge!

I had no clue, but thanks for the book lead! It didn't come up directly, but SimCity 2000 and especially SimCity 4 had a huge impact on me growing up / I still spin up SimCity 4 from time to time, so I imagine there's a massive indirect influence haha.

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JetSetIlly
4 hours ago
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Cool. This is how I imagine the ants were programmed by the spiders in Children of Time.
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i_am_a_squirrel
11 hours ago
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what is this? assembly for ants?
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forkerenok
5 hours ago
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It's assembly for people who can code good.. and can do other things good too.
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yesthisiswes
4 hours ago
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It needs to be at least three times this size!
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RandomTeaParty
39 minutes ago
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just be glad that ants are ambiturners
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armandhammer10
11 hours ago
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ant-ssembly to be precise
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testfrequency
8 hours ago
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So hot right now
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anta40
1 hour ago
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So.... a sort of modern Corewar?
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RandomTeaParty
6 hours ago
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Did website break?

I only see "MOMENT" and "All systems nominal"

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greenbit
3 hours ago
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Incredible low contrast font color in use there. Looks like about 0x002000 on pure black (per Mk-1 eyeball).

What possesses people to go for these barely perceptible color schemes?

.. a few minutes later ..

Ok, the crazy low contrast was on the initial landing page. Things have somewhat improved after prodding somewhat blindly at it.

I'll let the question stand though, bc why do that for what's going to be people's first impression?

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armandhammer10
3 hours ago
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try pressing any key or clicking around :)
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nozzlegear
8 hours ago
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I think I read a Daniel Suarez book about this once.
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phreeza
5 hours ago
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Reminds me of my personal HN glory days, now 16 years ago!! https://news.ycombinator.com/item?id=1395726
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orsorna
1 hour ago
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The amount of effort put into this tool...just for hiring to your exact shop? I cannot imagine that's a good return on investment?
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lightamulet
40 minutes ago
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i think this took me (1 person) like 40 hours max? all built in the last week, though i spent more time than i should have on it haha. quite ai-assisted, that's how most of the layout like the editor, player controls, even eval server got set up.

i spent way too much time on things like the language itself, map generation, and figuring how to only recompute the sim on material code changes vs whitespace and comments (it assembles to "bytecode" with debouncing! and the sim component takes the bytecode as a prop).

we'll see if good ROI, we definitely intend to run more of these types of challenges in the future, so much of this work won't go to waste

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Kinrany
46 minutes ago
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People like doing cool stuff
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general_reveal
4 hours ago
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Orwell would suggest you use the word normal.
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kleiba
8 hours ago
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I wish I could read dark-mode but my eyes somehow cannot handle it (not just on that website, in general).
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purplehat_
8 hours ago
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there is a `theme set` command
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Thanakorn_551
4 hours ago
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This is really quite cool.
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ivanjermakov
2 hours ago
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All dark themes are too low contrast. Give me pure white (including comments) on pure black please.
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lightamulet
54 minutes ago
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on the home page (dev.moment.com) you can type `theme -h` and then `theme set [name]` to change the color scheme, which carries forward to the sim!
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ivanjermakov
21 minutes ago
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Yes. I checked every theme and all dark themes are too low contrast. Pacman is good but comments are barely readable (gray on dark gray).
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4b11b4
11 hours ago
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Wait what this is the best reason to write a bunch of assembly AND learn about ants?
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armandhammer10
11 hours ago
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And (potentially) go to Hawaii!

But in all seriousness, ants are smarter than they look. They operate as a collective. Just in the same way that assembly needs to operate collectively to get the best output.

They're more closely linked than they appear from the outside ;)

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dspillett
5 hours ago
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> ants are smarter than they look.

Many moons ago I had a big pot of rhubarb in my back yard¹ and was initially irritated by the appearance of ants and aphids, until I took a moment to watch them and realise that the ants were bringing in the aphids and tending to them. The buggers were farming. The ants can't digest the leaves of the rhubarb, but the aphids can and excrete a sugary by-product that the ants “milk” from them. It is a fascinating bit of nature to read into. They even defend the aphids from predators and so forth, so it isn't a bad life for them either.

--------

[1] Not a euphemism for a lovely garden in that case, it was literally about a square yard of concrete behind the mid-terrace I was renting.

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embedding-shape
6 hours ago
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> But in all seriousness, ants are smarter than they look.

I'd argue the opposite, ants are dumber than they look. You look at a random ant stack in the forest and it looks like they're smart, but that's only when they're "controlled" by the collective, individual ants themselves are pretty dumb in the end, but it's hard to see as typically we always see them around/in their stacks in nature.

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lukan
7 hours ago
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As a collective, yes. If you look at individuals, they often go in circles and act really dumb. But for the colony it still works out, bigger brains would cost too much energy I suppose and simple algorithms work. (I often watched real ants while and my head translated their behavior to simple algorithms)
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kitd
7 hours ago
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Someone else who has read Godel, Escher, Bach by Hofstadter?
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oddmade
7 hours ago
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Excellent book cheers
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macleginn
1 hour ago
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What's with "artesenal"? Is this a joke that I don't understand or a surprising way to write "artisanal"?
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lightamulet
56 minutes ago
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the answer is my editor doesn't have spellcheck and i apparently don't know english as well as i thought, fixing :')
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nurettin
11 hours ago
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This is a balancing act between collectors and explorers. There is probably some optimized number. Likely targeted at beginners.
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FpUser
6 hours ago
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Am I being dumb? I was expecting to see ability to look at and run some canned sim
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TruffleLabs
12 hours ago
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Why? =>

"Moment Engineering by Moment Technology wants to access your {GitHub account name} account Personal user data Email addresses (read-only), profile information (read-only) This application will be able to read your private email addresses and read your private profile information."

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sudo_cowsay
12 hours ago
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Nice way of hiring but is it really worth it to give the public a trip to Maui (kinda expensive these days)

Does it really reveal that much talent to make it worth the money?

Just curious

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tgsovlerkhgsel
3 hours ago
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The prizes (Maui trip, second/third prizes, swag kits, shipping for the swag kits) probably cost around $20k in total.

Assuming an engineer costs $200k/year, 200 effective working days per year, that's 1k/day. Developing the contest (from the idea to building the rules to building the site to playtesting) likely cost more than 20 eng-days, making it the biggest cost.

Hiring is expensive. If it takes 30 minutes to screen one candidate for suitability for the "real" interview and 5h to do a "real" interview (including evaluation etc.), 5 screenings for one interview-worthy candidate and 5 interviews for one hire (I suspect the real factors might be closer to 10), that's 12.5h of screening and 25h of interviewing per hire.

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boutell
34 minutes ago
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Sure, hiring is expensive, but firing is really expensive! I salute your efforts to get it right on the first try.
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armandhammer10
12 hours ago
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It's less about the money. It's about giving people a chance to do something fun / show off their skills and get rewarded for it.

Plus, Hawaii is awesome.

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dr_kiszonka
11 hours ago
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I think it is a fun contest! As for recruitment, it suggests to me you are looking for people with no kids, and possibly young people.
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nylonstrung
6 hours ago
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Appreciate this, very cool of you to do that
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AndrewKemendo
1 hour ago
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Way less than you would pay for a recruiter

they usually ask for a non trivial percentage of the first year salary

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