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Jonah Ostroff

@ostroffj.bsky.social
254 followers 106 following 32 posts

Associate Teaching Professor at UW Seattle. Math, puzzles, & public transit.

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Jonah Ostroff @ostroffj.bsky.social · 05/10/2026
This rules. Also TIL the Petersen graph has *exactly* 2000 spanning trees?
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Jonah Ostroff @ostroffj.bsky.social · 23/09/2026
???
A screenshot of this post, with a question mark alongside an arrow pointing at the No Kings pfp.
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Jonah Ostroff @ostroffj.bsky.social · 14/09/2026
It also had a lot of anti-puzzle rhetoric :(
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Jonah Ostroff @ostroffj.bsky.social · 02/09/2026
LitInteractiveFiction
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Jonah Ostroff @ostroffj.bsky.social · 20/08/2026
Oh this one is easy. Have each player hold down one of the buttons, then use /lanparty.
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Jonah Ostroff @ostroffj.bsky.social · 09/08/2026
My favorite is when it's a fantasy novel that takes place in an alternate version of the real world, so the map is just "New York" or "the Arabian Peninsula".
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Jonah Ostroff @ostroffj.bsky.social · 12/06/2026
Haha, I was trying to remember what I submitted (it hasn't come up for me yet).
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Jonah Ostroff @ostroffj.bsky.social · 21/05/2026
yep!
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Jonah Ostroff @ostroffj.bsky.social · 20/05/2026
(oops, i mean counterclockwise)
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Jonah Ostroff @ostroffj.bsky.social · 20/05/2026
King County Routle had a similar one a few months back, rotated about 10 degrees clockwise, but with a very different answer.
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Jonah Ostroff @ostroffj.bsky.social · 20/05/2026
this was fun to do with ~0 knowledge of Portland transit Routle - TriMet 05/20/2026 🟩 ⬛ ⬛ ⬛ ⬛
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Jonah Ostroff @ostroffj.bsky.social · 16/05/2026
I'm at a math conference at Great Wolf Lodge (don't ask me why a math conference is at a water park) and I'm devastated to report that the ranch milkshake is not bad.
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Jonah Ostroff @ostroffj.bsky.social · 04/05/2026
Yeah but I'm not going to Greenwood from Judkins Park!
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Jonah Ostroff @ostroffj.bsky.social · 04/05/2026
The improvements to my commute are nice and all, but the easy trips to Valhalla Sandwiches are the true game changer.
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Jonah Ostroff @ostroffj.bsky.social · 28/03/2026
@stephenjudkins.bsky.social Congrats man!
People celebrating the opening of Stephen Judkins’s eponymous station
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Jonah Ostroff @ostroffj.bsky.social · 18/02/2026
I Wish?
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Jonah Ostroff @ostroffj.bsky.social · 22/01/2026
Absolutely! It's been way too long.
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Jonah Ostroff @ostroffj.bsky.social · 18/12/2025
Ah, gotcha. I asked my PT about this once and she was like, “yeah, there a million apps” but didn’t have a specific rec.
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Jonah Ostroff @ostroffj.bsky.social · 18/12/2025
What’s the app?
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Jonah Ostroff @ostroffj.bsky.social · 17/12/2025
It's still going???
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Jonah Ostroff @ostroffj.bsky.social · 17/12/2025
This is an incredible exchange.
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Jonah Ostroff @ostroffj.bsky.social · 14/12/2025
I'm especially excited because one of the designers was the late Jack Lance, the most brilliantly creative person I've ever known. You can find some of his games and puzzle hunts here: jacklance.github.io/games.html jacoblance.wordpress.com
jacklance.github.io
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Jonah Ostroff @ostroffj.bsky.social · 14/12/2025
Heroes of Sokoban was a short free puzzle series I made over a few weekends in 2013. Having it be part of a project with a budget in the tens of millions is, uh, pretty surreal! I'm looking forward to seeing what this team has done with the ideas.
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Jonah Ostroff @ostroffj.bsky.social · 14/12/2025
I completely agree with everything Alan says here: the game seems very cool, but I'm bummed about who Jon Blow has become over the years, and it's unfortunate that he's the face of it.
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Jonah Ostroff @ostroffj.bsky.social · 02/12/2025
Right, I teach at a large public, and "I have a diagnosis that I need accommodations for, but the first available appointment with the disability resource center is after our first exam" is something I hear every single quarter. It's absurd to think that this process is too easy.
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Jonah Ostroff @ostroffj.bsky.social · 18/08/2025
Scholomance by Naomi Novik for sure. I’d also recommend The Incandescent by Emily Tesh and The House on the Cerulean Sea by T.J. Klune (that one is more cozy than dark though).
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Jonah Ostroff @ostroffj.bsky.social · 03/07/2025
This might have some food safety implications but we can deal with those later.
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Jonah Ostroff @ostroffj.bsky.social · 30/05/2025
I moved here twelve years ago and felt like everyone had been lying to me. It's like this for half the year, and the rainy months are the lightest rain imaginable.
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Reposted by Jonah Ostroff
WRONG or METAPHYSICAL IN NATURE @jsthrill.modphi.com · 03/02/2025
don't think of this as the american experiment failing, think of it as confirmation of the american null hypothesis
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Jonah Ostroff @ostroffj.bsky.social · 08/12/2024
No :(
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Jonah Ostroff @ostroffj.bsky.social · 05/11/2024
its square is coming up soon too! a great time to reclaim it.
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Jonah Ostroff @ostroffj.bsky.social · 29/09/2023
Hell yeah that’s me. Here are five codes btw
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Jonah Ostroff @ostroffj.bsky.social · 06/07/2023
While crashing *her* party!
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