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    Nicky Case

    ncase.me · Personal blog · on HN since 2014

    Nicky Case makes interactive explainers and games on topics like game theory, trust, voting, and learning.

    Visit blogHN submissions
    Design & UXData & VisualizationCulture & Society
    What HN says

    Commenters praise their "explorable explanations", especially Evolution of Trust, which one's five-year-old loves, and the spaced repetition game.

    Stats for nerds
    402HN people shared it
    197linked in comments
    7Kstory points
    Jul 2026last shared
    2017people per year2026

    Top posts on HN

    1. 1
      Fireflies
      8 people · 1.4K points · first shared 2017 · 89 comments on HN
    2. 2
      Game theory illustrated by an animated cartoon game
      114 people · 1.4K points · first shared 2017 · 74 comments on HN
    3. 3
      Loopy: a tool for thinking in systems
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    4. 4
      Parable of the Polygons – a playable post on the shape of society
      65 people · 588 points · first shared 2014 · 86 comments on HN
    5. 5
      What Happens Next? Covid-19 Futures, Explained with Playable Simulations
      8 people · 295 points · first shared 2020 · 90 comments on HN
    6. 6
      How Do We Learn?
      1 person · 272 points · first shared 2018 · 62 comments on HN
    7. 7
      Back to the Future with RSS
      2 people · 244 points · first shared 2021 · 101 comments on HN
    8. 8
      Joy.js – make happy little programs (2017)
      6 people · 218 points · first shared 2017 · 19 comments on HN
    9. 9
      Interactive demos on network theory, game theory, trust etc
      26 people · 209 points · first shared 2017 · 6 comments on HN
    10. 10
      Anxiety: An Interactive Story
      2 people · 180 points · first shared 2019 · 29 comments on HN

    What HN people wrote when they linked it

    • drawkboxJun 2023

      Spaced repetition is how we truly learn everything when dealing with it a little bit every day.

      A really great, fun game on this is from Nicki Case called "How To Remember Anything Forever-ish" [1]

      Additionally, the site has some other amazing games that really should be part of everyone's education and are Oregon Trail like in their impact.

      One of my favorites is the "Evolution of Trust" about game theory. [2] Probably the best game theory game out there.

      As an aside, you can program yourself and people with spaced repetition. Lots of propaganda uses it heavily but it can be used for good and bad. If you hear small facts everyday or small bits of propaganda everyday, it can over time evoke an pavlovian like response to the information, either good or bad. Using it can also bump up things you want to know about, and be aware when external information is being pumped.

      Basically spaced repetition mimics how you'd naturally come across something repetitively and the learning becomes automatic, it is iterative.

      Educational games like Nicky Case makes are awesome and really do help simplify and solidify certain topics so check them out. [3]

      [1] https://ncase.me/remember/

      [2] https://ncase.me/trust/

      [3] https://ncase.me/

    • modernerdJan 2020

      I revisit Fireflies from time to time, but everything on https://ncase.me/ is wonderful. I particularly like https://ncase.me/door/.

      Nicky's site elevates the web beyond “magazines/newspapers/leaflets on a network-connected screen”. It reminds you that the web can be a rich and interactive medium with stories told and ideas taught with love and with care.

      It feels like there's a gap in the market for tools that help people to build richer experiences and “playable articles” like these.

      So many content management systems and platforms seem stuck in the “your website is a brochure but online” mindset. In the same way that PowerPoint seems to encourage crappy presentations, traditional tools for website creation often do the same for websites. Coupled with the sheer difficulty of creating and maintaining a website, it's no wonder that blogs and personal sites feel like they're in decline.

      I'd love to see more tools that let users build sites that aren't just linked pages whose most interactive feature is a contact form or search field. The only one I can think of that's close is https://glitch.com/. Are there others I've missed?

    • JoshTriplettJan 2024

      The winning multi-round group strategy in a game in which you can identify and remember different people is, roughly, "cooperate with cooperators, defect with defectors".

      https://ncase.me/trust/ is well worth playing to get an idea of how this works.

      (Also, by way of acknowledging that reality is more complex than simulations like the Prisoner's Dilemma, in reality you might also have options like "stop interacting with defectors in order to avoid lose-lose situations" or "warn others about defectors, and listen to others' warnings but weight them based on whether the entity giving the warning is honest". And conversely, defectors get more options like "pretend to be a different entity with no history" or "pretend to be a known trusted entity".)

    • svilen_dobrevFeb 2026

      some hand-wavy thoughts..

      > it has them (preconceptions), it's just that you don't know what they are.

      further in this direction... the "thing" might evolve into some cyclic (or not) system. a bit like that LIFE game, emerging a tv-tennis-like ping-ponging, or whatever. How would you know there is such thing? just stats/counts do not tell. (Which pulls another freaky question - how would u notice a different intelligence/world-order/culture/resemblance-of?)

      maybe feature: some stop-gap animation over world-map in time? Then, some pattern analysis over that.. History of the world, part one..

      btw check these "interactive simulations", maybe some ideas about "loading" the agents with preconceptions :)

      https://ncase.me/

    • staredJul 2022

      Author here.

      Indeed, much inspiration comes from the data viz and explorable explanation community. Previously, I worked in D3.js. The idea behind the precursor, Quantum Game with Photons, was precisely to provide a composable environment for simulating any system.

      In another recent publication, "Quantum games and interactive tools for quantum technologies outreach and education" (https://www.spiedigitallibrary.org/journals/optical-engineering/volume-61/issue-08/081809/Quantum-games-and-interactive-tools-for-quantum-technologies-outreach-and/10.1117/1.OE.61.8.081809.full), there is a whole section "3.3. Explorable Explanations" written by me and no-one else than Nicky Case (https://ncase.me/).

    • kirseOct 2022

      Yea, it's been interesting to watch how RCV has filtered into the public consciousness over the past 5-10 years and slowly increased in terms of how many people parrot it as the answer to all our voting ills.

      There was a site posted to HN years back that mathematically analyzed a ton of these voting schemes, I cannot seem to find it on Google but it was some sort of hybrid scheme that apparently has the best overall outcomes.

      Edit: Given some of the comments below, some good material on these voting systems...

      https://news.ycombinator.com/item?id=13161396

      https://ncase.me/ballot/

      https://rangevoting.org/rangeVirv.html

      http://zesty.ca/voting/sim/

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