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Show HN: Cerno – CAPTCHA that targets LLM reasoning, not human biology

https://cerno.sh
11•plawlost•2h ago

Comments

opem•2h ago
this game is a rage bait! Try solving on a mobile device. I don't think an elderly person would ever be able to get through this!
king_phil•1h ago
Was impossible for me to solve, too, on mobile.
bestouff•1h ago
Same. I think an AI would have an easier time than me.
ahofmann•1h ago
I managed once to complete the maze, but then it went into "checking" and a spinner forever.
ge96•1h ago
Even when I successfully draw a path from green to red, not touching anything it says "Sorry that's not quite right"
iwalton3•2h ago
Unfortunately it didn't work for me with my trackball mouse. I tried multiple times. This is very likely also problematic for accessibility without another verification pathway, as assistive devices and screen readers would fail the heuristics too.
modinfo•36m ago
It doesn't work for me either, I was trying multiple times and always fails, I was started to think, that maybe I'm the robot.
dcliu•1h ago
Interesting idea but it didn't accept me the first 3-4 times I tried to draw the path on laptop trackpad - going slow led to it failing before I was finished, going fast led to messy paths that were rejected as well. Could something like this work for users with different levels of dexterity?
kccqzy•1h ago
I am on a mobile device and I consistently find that my finger is not precise enough to draw a path; it kept complaining about path “not quite right” where my path just touched the wall a little bit. And when my finger literally obscures the screen while drawing, it essentially means I have to memorize an entire path before beginning.

This requires significant spatial thinking skills and short-term memory for a human and it is absolutely unfair for a human to expend that much cognitive power to access a website.

happytoexplain•1h ago
Everybody is saying it's impossible on mobile/trackpads, but I couldn't do it with a mouse either :(
CoUHKT57BSe•1h ago
I'm assuming this is an april fools joke... cause it just don't work at all as a CAPTCHA.
ranger_danger•1h ago
The description doesn't make sense either... like "Color-word interference at maze decision points", but there are no colors (or words) at the decision points.
ravenical•1h ago
Is the idea that if you /pass/, you're an AI?
_diyar•1h ago
I‘m as confused as the other commenters, especially since it‘s unusable on an iPad.
simlevesque•1h ago
I did it correctly with a mouse and was rejected. Then I drew a straight line and was rejected. Then I closed the tab.
Surac•1h ago
Does not work on a touchscreen. Can’t see maze under finger and smh it always kicks me in the middle of the drawing
ceayo•1h ago
am i a robot or is this just way too hard?
1attice•1h ago
Did not work for me (kept getting "something's not right") but I applaud the concept.

I worry a bit about accessibility but that is a problem all CAPTCHAs have

DHolzer•1h ago
like the idea, but i cant see what i'm doing when my finger coveres the screen

The Claude Code Source Leak: fake tools, frustration regexes, undercover mode

https://alex000kim.com/posts/2026-03-31-claude-code-source-leak/
446•alex000kim•8h ago•176 comments

OpenAI closes funding round at an $852B valuation

https://www.cnbc.com/2026/03/31/openai-funding-round-ipo.html
163•surprisetalk•1h ago•151 comments

Ministack (Replacement for LocalStack)

https://ministack.org/
32•kerblang•1h ago•3 comments

Cohere Transcribe: Speech Recognition

https://cohere.com/blog/transcribe
135•gmays•5h ago•46 comments

Slop is not necessarily the future

https://www.greptile.com/blog/ai-slopware-future
126•dakshgupta•7h ago•232 comments

4D Doom

https://github.com/danieldugas/HYPERHELL
33•chronolitus•3d ago•2 comments

Show HN: Postgres extension for BM25 relevance-ranked full-text search

https://github.com/timescale/pg_textsearch
64•tjgreen•5h ago•27 comments

GitHub's Historic Uptime

https://damrnelson.github.io/github-historical-uptime/
315•todsacerdoti•2h ago•93 comments

Open source CAD in the browser (Solvespace)

https://solvespace.com/webver.pl
257•phkahler•9h ago•81 comments

OkCupid gave 3M dating-app photos to facial recognition firm, FTC says

https://arstechnica.com/tech-policy/2026/03/okcupid-match-pay-no-fine-for-sharing-user-photos-wit...
223•whiteboardr•4h ago•53 comments

Teenage Engineering's PO-32 acoustic modem and synth implementation

https://github.com/ericlewis/libpo32
45•ericlewis•3d ago•9 comments

Show HN: Forkrun – NUMA-aware shell parallelizer (50×–400× faster than parallel)

https://github.com/jkool702/forkrun
85•jkool702•4d ago•13 comments

Nematophagous Fungus

https://en.wikipedia.org/wiki/Nematophagous_fungus
23•lordgilman•4d ago•3 comments

Claude Code's source code has been leaked via a map file in their NPM registry

https://twitter.com/Fried_rice/status/2038894956459290963
1793•treexs•12h ago•882 comments

From 300KB to 69KB per Token: How LLM Architectures Solve the KV Cache Problem

https://news.future-shock.ai/the-weight-of-remembering/
56•future-shock-ai•2d ago•5 comments

I Traced My Traffic Through a Home Tailscale Exit Node

https://tech.stonecharioteer.com/posts/2026/tailscale-exit-nodes/
28•stonecharioteer•2h ago•6 comments

OpenAI raises $122B to accelerate the next phase of AI

https://openai.com/index/accelerating-the-next-phase-ai/
15•alvis•57m ago•1 comments

Back to FreeBSD – Part 2 – Jails

https://hypha.pub/back-to-freebsd-part-2
4•vermaden•4d ago•1 comments

A Primer on Long-Duration Life Support

https://mceglowski.substack.com/p/a-primer-on-long-duration-life-support
47•zdw•4d ago•12 comments

Axios compromised on NPM – Malicious versions drop remote access trojan

https://www.stepsecurity.io/blog/axios-compromised-on-npm-malicious-versions-drop-remote-access-t...
1737•mtud•19h ago•704 comments

Super Micro Computer Investors Look for Exits

https://catenaa.com/markets/equities/super-micro-computer-investors-look-for-exits/
9•malindasp•2h ago•4 comments

Accidentally created my first fork bomb with Claude Code

https://www.droppedasbaby.com/posts/2602-01/
43•offbyone42•14h ago•11 comments

Why the US Navy won't blast the Iranians and 'open' Strait of Hormuz

https://responsiblestatecraft.org/iran-strait-of-hormuz/
95•KoftaBob•12h ago•209 comments

Audio tapes reveal mass rule-breaking in Milgram's obedience experiments

https://www.psypost.org/audio-tapes-reveal-mass-rule-breaking-in-milgram-s-obedience-experiments-...
180•lentoutcry•3d ago•115 comments

GitHub Monaspace Case Study

https://lettermatic.com/custom/monaspace-case-study
98•homebrewer•6h ago•35 comments

Combinators

https://tinyapl.rubenverg.com/docs/info/combinators
119•tosh•10h ago•36 comments

Scotty: A beautiful SSH task runner

https://freek.dev/3064-scotty-a-beautiful-ssh-task-runner
36•speckx•5h ago•21 comments

Ask HN: Distributed data centers in our basements

37•cmos•7h ago•52 comments

Microsoft: Copilot is for entertainment purposes only

https://www.microsoft.com/en-us/microsoft-copilot/for-individuals/termsofuse
390•lpcvoid•7h ago•149 comments

Securing Elliptic Curve Cryptocurrencies Against Quantum Vulnerabilities [pdf]

https://quantumai.google/static/site-assets/downloads/cryptocurrency-whitepaper.pdf
38•jandrewrogers•5h ago•20 comments