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The 29th International Obfuscated C Code Contest (IOCCC) 2025 Winners

https://www.ioccc.org/2025/
73•matt_d•1h ago

Comments

aquir•1h ago
The website itself is obfuscated, it’s not easy to find the C sources at all!
lifebeyondfife•45m ago
Can jump straight to https://www.ioccc.org/2025/#inventory
haunter•1h ago
The GameBoy emulator's code also looks like the GameBoy. Slow clap this is insane, definitely my favorite entry.

https://github.com/ioccc-src/winner/blob/master/2025/ncw1/pr...

The author, Nick Craig-Wood, is the creator of rclone!

sourcecodeplz•51m ago
Damn, that is cool! Looking at me typing css & php...
larodi•1h ago
Tis a pity to not have LLMs compete, given level of obfuscation they be capable of.
lifthrasiir•43m ago
In my experience LLMs were pretty good at deobfuscating many entries (including mine) but very awful at generating any significantly obfuscated code. So obfuscation can be regarded as a truly humane art---at least for now.
AlotOfReading•25m ago
It's a bit annoying getting frontier models to even work on IOCCC code because of "safety", but even if you get around that LLMs just aren't very good at it. Obfuscating code involves a level of creativity and deviousness that LLMs struggle to meet.
rurban•28m ago
So like at a film festival, 90% of the entries won a price, but unlike a film festival there's not a single best. Weird, like modern education.
yayitswei•7m ago
In case anyone was wondering, the IOCCC specifically permits LLM use in their guidelines.

"The IOCCC has a rich history of remarkable winning entries created by authors who skillfully employed various techniques (often their own tools) to develop their code."

The 29th International Obfuscated C Code Contest (IOCCC) 2025 Winners

https://www.ioccc.org/2025/
73•matt_d•1h ago•10 comments

I design with Claude more than Figma now

https://blog.janestreet.com/i-design-with-claude-code-more-than-figma-now-index/
92•MrBuddyCasino•2h ago•58 comments

Valve P2P networking broken for more than 2 months

https://github.com/ValveSoftware/GameNetworkingSockets/issues/398
118•babuskov•4h ago•54 comments

Field of clones: How horse replicas came to dominate polo

https://knowablemagazine.org/content/article/technology/2026/cloned-polo-horses
71•gscott•4h ago•36 comments

My Software North Star

https://kristoff.it/blog/north-star/
37•kristoff_it•3d ago•9 comments

Tokenomics: Quantifying Where Tokens Are Used in Agentic Software Engineering

https://arxiv.org/abs/2601.14470
87•Anon84•6h ago•26 comments

Symbolica 2.0: Programmable Symbols for Python and Rust

https://symbolica.io/posts/symbolica_2_0_release/
66•mmastrac•1d ago•6 comments

Ntsc-rs – open-source video emulation of analog TV and VHS artifacts

https://ntsc.rs/
328•gregsadetsky•12h ago•86 comments

Harness engineering: Leveraging Codex in an agent-first world

https://openai.com/index/harness-engineering/
176•pramodbiligiri•1d ago•113 comments

Public Domain Image Archive

https://pdimagearchive.org/
98•davidbarker•7h ago•16 comments

How Liminalism Became the Defining Aesthetic of Our Time

https://hyperallergic.com/how-liminalism-became-the-defining-aesthetic-of-our-time/
50•zeech•5h ago•31 comments

Biohub releases a world model of protein biology

https://biohub.org/news/world-model-of-protein-biology/
51•gmays•3d ago•2 comments

Show HN: Oproxy – inspect and modify network traffic from the browser

https://github.com/sauravrao637/oproxy
36•sauravrao637•5h ago•6 comments

Introducing Boron Buckyballs: Theory that B80 cages can’t be made is disproved

https://cen.acs.org/materials/nanomaterials/buckyballs-boron-buckminster-fullerene-nanomaterials/...
77•crescit_eundo•2d ago•19 comments

Human-Like Neural Nets by Catapulting

https://gwern.net/llm-catapult
25•telotortium•7h ago•3 comments

Moving beyond fork() + exec()

https://lwn.net/SubscriberLink/1076018/16f01bbbb8e0d1f0/
287•jwilk•17h ago•286 comments

Arithmetic Without Numbers – How LLMs Do Math

https://alvaro-videla.com/llm-arithmetic-internals/article_interactive/article.html
10•old_sound•1d ago•3 comments

Meta confirms 1000s of Instagram accounts were hacked by abusing its AI chatbot

https://this.weekinsecurity.com/meta-confirms-thousands-of-instagram-accounts-were-hacked-by-abus...
557•speckx•13h ago•199 comments

Nvidia is proposing a beast of a CPU system for Windows PCs

https://twitter.com/lemire/status/2062880075117113739
269•tosh•18h ago•458 comments

Zeroserve: A zero-config web server you can script with eBPF

https://su3.io/posts/introducing-zeroserve
223•losfair•16h ago•54 comments

Sem: New primitive for code understanding – not LSPs, but entities on top of Git

https://ataraxy-labs.github.io/sem/
113•rohanucla•11h ago•39 comments

Google to pay SpaceX $920M a month for compute capacity at xAI data centers

https://www.cnbc.com/2026/06/05/google-to-pay-spacex-920-million-a-month-for-xai-compute-capacity...
231•toephu2•1d ago•804 comments

Show HN: TakoVM – Isolated model and tool execution used by enterprises

https://github.com/las7/TakoVM
19•sakuraiben•5h ago•6 comments

Show HN: Free animated icon library for Vue

https://respeak-io.github.io/lucide-motion-vue/
17•evolabs•2d ago•5 comments

The circus freaks of open source

https://drewdevault.com/blog/Circus-freaks-of-FOSS/
56•keyle•2h ago•14 comments

Ask HN: What was your "oh shit" moment with GenAI?

602•andrehacker•2d ago•1001 comments

Motorola effectively bricked its entire line of WiFi routers without explanation

https://mashable.com/tech/motorola-wifi-routers-stop-working-motosync-plus-app-down
126•thisislife2•17h ago•54 comments

Unicode Fonts and Tools for X11

https://www.cl.cam.ac.uk/~mgk25/ucs-fonts.html
37•kristianp•2d ago•7 comments

Pokemon Emerald Ported to WebAssembly (100k FPS)

https://pokeemerald.com/
308•tripplyons•20h ago•87 comments

An Ohio Valley 100k-Watt FM Signal Is Severed in Broad Daylight – Radio World

https://www.radioworld.com/news-and-business/headlines/an-ohio-valley-100000-watt-fm-signal-is-se...
98•pkaeding•6h ago•92 comments