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Solving Every Sudoku Puzzle (2006)

https://norvig.com/sudoku.html
24•djoldman•5d ago

Comments

boat-of-theseus•1h ago
If you want to see a master craftsman, check out the fastest sudoku solver.

Uses constraint propagation, not any specialized sudoku solving algorithms. But this person is a CSP expert and finds ways to optimize CSP for sudoku in particular.

… And then does it all in SIMD.

https://t-dillon.github.io/tdoku/

johnfn•1h ago
I've seen this article every now and then, and it's always fun to read. Something jumped out at me this time, though:

> As computer security expert Ben Laurie has stated, Sudoku is "a denial of service attack on human intellect". Several people I know (including my wife) were infected by the virus, and I thought maybe this would demonstrate that they didn't need to spend any more time on Sudoku.

Ah, yes... remember the halcyon days of 2006, when something as benign as Sudoku was considered to be a "denial of service attack on human intellect"?

jader201•41m ago
> As computer security expert Ben Laurie has stated, Sudoku is "a denial of service attack on human intellect". […] I thought maybe this would demonstrate that [my wife doesn’t] need to spend any more time on Sudoku.

The same could be said about every logic puzzle, or other types of puzzles.

People don't do them so actually solve any sort of new problem, or achieve some sort of productivity.

The same reason people don’t jog to get from point A to point B, or to learn how to get around more quickly.

Logic puzzles are exercising parts of our brain that don’t get exercised regularly.

a2800276•34m ago
Feels like the "demonstrated it's no longer necessary to solve sudokus" statement may have been a joke :)

Marble Fountain

https://willmorrison.net/posts/marble-fountain/
405•chris_overseas•6h ago•48 comments

Ask HN: What Are You Working On? (Nov 2025)

66•david927•2h ago•201 comments

JVM exceptions are weird: a decompiler perspective

https://purplesyringa.moe/blog/jvm-exceptions-are-weird-a-decompiler-perspective/
40•vrnvu•5d ago•2 comments

Montana becomes first state to enshrine 'right to compute' into law

https://montananewsroom.com/montana-becomes-first-state-to-enshrine-right-to-compute-into-law/
301•bilsbie•10h ago•141 comments

When Tesla's FSD works well, it gets credit. When it doesn't, you get blamed

https://electrek.co/2025/11/08/schrodingers-fsd-when-things-go-well-teslas-driving-when-they-dont...
63•Bender•43m ago•12 comments

Building a 2.5kWh battery from disposable vapes to power my workshop [video]

https://www.youtube.com/watch?v=dy-wFixuRVU
81•rsanek•6d ago•46 comments

The Manuscripts of Edsger W. Dijkstra

https://www.cs.utexas.edu/~EWD/
167•nathan-barry•7h ago•62 comments

The Principles of Diffusion Models

https://arxiv.org/abs/2510.21890
116•Anon84•7h ago•8 comments

'Up to 15 or 20′ air traffic controllers are retiring daily

https://www.pennlive.com/nation-world/2025/11/up-to-15-or-20-air-traffic-controllers-are-retiring...
51•geox•1h ago•25 comments

The Symbiosis of Rust and Arm: A Conversation with David Wood

https://filtra.io/rust/interviews/arm-sep-25
6•mooreds•6d ago•0 comments

The Sega Master System

https://bumbershootsoft.wordpress.com/2025/11/08/the-sega-master-system/
39•ibobev•4h ago•10 comments

Bumble Berry Pi – A Cheap DIY Raspberry Pi Handheld Cyberdeck

https://github.com/samcervantes/bumble-berry-pi
86•MakerSam•6h ago•18 comments

CHIP8 – writing emulator, assembler, example game and VHDL hardware impl

http://blog.dominikrudnik.pl/chip8-emulator-assembler-game-vhdl
42•qikcik•6d ago•3 comments

The Computer Church – Pennsylvania Computer and Technology Museum

https://www.thecomputerchurch.org/
24•gregsadetsky•3h ago•3 comments

Reviving Classic Unix Games: A 20-Year Journey Through Software Archaeology

https://vejeta.com/reviving-classic-unix-games-a-20-year-journey-through-software-archaeology/
122•mwheeler•10h ago•48 comments

Zensical – A modern static site generator built by the Material for MkDocs team

https://squidfunk.github.io/mkdocs-material/blog/2025/11/05/zensical/
109•japhyr•10h ago•37 comments

Solving Every Sudoku Puzzle (2006)

https://norvig.com/sudoku.html
24•djoldman•5d ago•4 comments

When Your Hash Becomes a String: Hunting Ruby's Million-to-One Memory Bug

https://mensfeld.pl/2025/11/ruby-ffi-gc-bug-hash-becomes-string/
75•phmx•5d ago•35 comments

Visualize FastAPI endpoints with FastAPI-Voyager

https://www.newsyeah.fun/voyager/
102•tank-34•10h ago•13 comments

AI isn't replacing jobs. AI spending is

https://www.fastcompany.com/91435192/chatgpt-llm-openai-jobs-amazon
529•felineflock•7h ago•362 comments

Using bubblewrap to add sandboxing to NetBSD

https://blog.netbsd.org/tnf/entry/gsoc2025_bubblewrap_sandboxing
69•jaypatelani•10h ago•22 comments

Drilling down on Uncle Sam's proposed TP-Link ban

https://krebsonsecurity.com/2025/11/drilling-down-on-uncle-sams-proposed-tp-link-ban/
93•todsacerdoti•5h ago•86 comments

The overengineered solution to my pigeon problem (2022)

https://maxnagy.com/posts/pigeons/
68•cyb0rg0•6d ago•51 comments

Startups are pushing the boundaries of reproductive genetics

https://www.wsj.com/tech/biotech/genetically-engineered-babies-tech-billionaires-6779efc8
66•nradov•8h ago•108 comments

Python Software Foundation gets a donor surge after rejecting federal grant

https://thenewstack.io/psf-gets-a-donor-surge-after-rejecting-anti-dei-federal-grant/
128•MilnerRoute•5h ago•63 comments

Ironclad – formally verified, real-time capable, Unix-like OS kernel

https://ironclad-os.org/
347•vitalnodo•1d ago•107 comments

I Am Mark Zuckerberg

https://iammarkzuckerberg.com/
1078•jb1991•17h ago•371 comments

William Gass and John Gardner: A Debate on Fiction (1979)

https://medium.com/the-william-h-gass-interviews/william-h-gass-interviewed-by-thomas-leclair-wit...
11•ofalkaed•1w ago•0 comments

Email verification protocol

https://github.com/WICG/email-verification-protocol
119•sgoto•1w ago•85 comments

Reverse engineering Codex CLI to get GPT-5-Codex-Mini to draw me a pelican

https://simonwillison.net/2025/Nov/9/gpt-5-codex-mini/
140•simonw•19h ago•68 comments