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Modeling what makes paper-folding puzzles hard

https://www.dailyunfold.com/blog/spatial-difficulty
12•astralasia•3d ago

Comments

astralasia•3d ago
Author here, happy to answer questions about any part of this. The scoring weights are hand-tuned from playtesting, not learned from data. Would love to hear from anyone with psychometrics or spatial cognition experience.
smitty1e•1h ago
By the third round, the submit button interfered with the puzzle on my S24 phone.
astralasia•12m ago
Thanks, I tried to make room for everything for all screen sizes but I guess I couldn't. I'll fix the layout.
jojobas•1h ago
Relevant ICFP Programming Contest 2016

https://icfpc2016.blogspot.com/2016/08/pdf-for-task-descript...

lifis•50m ago
I don't understand what is supposed to be "hard". It seems utterly trivial to me.

In reverse order of the folds, just mirror all holes across the fold line.

NooneAtAll3•39m ago
something very wrong with brightness of the paper - it blends in with the background so much, it's impossible to play
astralasia•13m ago
thanks for flagging this, the contrast is definitely too low. I'll fix this.

OpenYak – An open-source Cowork that runs any model and owns your filesystem

https://github.com/openyak/desktop
20•wangzhangwu•1h ago•4 comments

Founder of GitLab battles cancer by founding companies

https://sytse.com/cancer/
834•bob_theslob646•11h ago•187 comments

CSS is DOOMed

https://nielsleenheer.com/articles/2026/css-is-doomed-rendering-doom-in-3d-with-css/
251•msephton•8h ago•56 comments

AI overly affirms users asking for personal advice

https://news.stanford.edu/stories/2026/03/ai-advice-sycophantic-models-research
580•oldfrenchfries•15h ago•443 comments

OpenBSD on Motorola 88000 Processors

http://miod.online.fr/software/openbsd/stories/m88k1.html
70•rbanffy•1d ago•8 comments

The case for becoming a manager

https://newsletter.thelongcommit.com/p/the-case-for-becoming-a-manager
13•jcmartinezdev•4d ago•0 comments

Further human + AI + proof assistant work on Knuth's "Claude Cycles" problem

https://twitter.com/BoWang87/status/2037648937453232504
179•mean_mistreater•10h ago•118 comments

A Verilog to Factorio Compiler and Simulator (Working RISC-V CPU)

https://github.com/ben-j-c/verilog2factorio
38•signa11•2d ago•2 comments

The 667MHz Machine

https://www.0xsid.com/blog/667mhz-machine
33•ssiddharth•3d ago•3 comments

I decompiled the White House's new app

https://thereallo.dev/blog/decompiling-the-white-house-app
444•amarcheschi•13h ago•164 comments

The first 40 months of the AI era

https://lzon.ca/posts/other/thoughts-ai-era/
151•jpmitchell•10h ago•76 comments

Linux is an interpreter

https://astrid.tech/2026/03/28/0/linux-is-an-interpreter/
182•frizlab•12h ago•38 comments

Cat Itecture: Better Cat Window Boxes

https://gwern.net/catitecture
30•gggscript•21h ago•4 comments

Sealing Paper Packaging Without Adhesives

https://www.fraunhofer.de/en/press/research-news/2026/march-2026/sealing-paper-packaging-without-...
49•gnabgib•6h ago•14 comments

I Built an Open-World Engine for the N64 [video]

https://www.youtube.com/watch?v=lXxmIw9axWw
375•msephton•17h ago•63 comments

OpenCiv1 – open-source rewrite of Civ1

https://github.com/rajko-horvat/OpenCiv1
116•caminanteblanco•11h ago•34 comments

South Korea Mandates Solar Panels for Public Parking Lots

https://www.reutersconnect.com/item/south-korea-mandates-solar-panels-for-public-parking-lots/dGF...
251•_____k•5h ago•135 comments

Google just gave Android power users a sideloading win

https://www.androidauthority.com/android-sideload-carry-over-3652845/
71•croemer•8h ago•73 comments

Meta Partners with Arm to Develop New Class of Data Center Silicon

https://about.fb.com/news/2026/03/meta-partners-with-arm-to-develop-new-class-of-data-center-sili...
52•eatonphil•4d ago•12 comments

Alzheimer's disease mortality among taxi and ambulance drivers (2024)

https://www.bmj.com/content/387/bmj-2024-082194
71•bookofjoe•4h ago•44 comments

Spanish legislation as a Git repo

https://github.com/EnriqueLop/legalize-es
705•enriquelop•17h ago•215 comments

InpharmD (YC W21) Is Hiring – Senior Ruby on Rails Developer

https://inpharmd.com/jobs/senior-ruby-on-rails-engineer
1•tulasichintha•7h ago

1929: Inside the Greatest Crash in Wall Street History

https://www.nybooks.com/articles/2026/03/26/tick-tick-boom-1929-andrew-ross-sorkin/
61•mitchbob•4d ago•50 comments

Show HN: PeriodicTableOfElements.org

https://periodictableofelements.org/?lang=en
16•nadermx•4h ago•4 comments

Detecting file changes on macOS with kqueue

https://www.vegardstikbakke.com/kqueue/
72•benhoyt•4d ago•12 comments

Stop picking my Go version for me

https://blog.howardjohn.info/posts/go-mod-version/
43•ingve•7h ago•28 comments

Modeling what makes paper-folding puzzles hard

https://www.dailyunfold.com/blog/spatial-difficulty
12•astralasia•3d ago•7 comments

Undroidwish – a single-file, batteries-included Tcl/Tk binary for many platforms

https://androwish.org/home/wiki?name=undroidwish
71•smartmic•12h ago•3 comments

Improved Git Diffs with Delta, Fzf and a Little Shell Scripting

https://nickjanetakis.com/blog/awesome-git-diffs-with-delta-fzf-and-a-little-shell-scripting
135•nickjj•4d ago•35 comments

Memory That Collaborates

https://datahike.io/notes/collaborate-without-infrastructure/
36•whilo•2d ago•2 comments