@chaintuts.bsky.social
Explaining computer science for everyone! Run by Josh McIntyre - Full timer at Microsoft PGH, tech educator @chaintuts👨🏫💻 Active adventurer / rocker climber / jiu jitsu nerd. PGP: 1DC3 1720 441B 9945 C51F chaintuts.com
A climber on a purple 5.10d autobelay route, stepping feet high and using small crimpy holds.
A climber working a pink dihedral route, with spread out feet in a drop knee and two underclings.
A climber pulling on a roof boulder and pushing the feet for tension
13.10.2025 23:40 — 👍 0 🔁 0 💬 0 📌 0
A climber on a roof boulder pulling with feet pushing and heel hooking.
A climber working feet up an autobelay route.
A female climber at the top of an autobelay route. This poster is proud of his wife Maria!
A climber on a slabby, footwork dependent topout boulder.
13.10.2025 23:40 — 👍 3 🔁 0 💬 1 📌 0
Two climbers, husband and wife enjoying a day at Ascend Climbing Gym.
Two climbers friends at Climb North gym.
Climbing a tall, reachy 5.10d route on autobelay, mangling off a volume.
A climber mantling on a fun dihedral boulder problem.
31 laps around the sun! Got to climb all weekend with my favorite people and some solo too. Grateful to be surrounded by such good people and do the things I enjoy.
#Climbing
📺 youtube.com/c/chaintuts
📖 books2read.com/digitalsovereignty
If you're missing some words from your crypto seed phrase, is recovery possible? Well...maybe. Learn the math of seed word recovery with my free and open tutorial!
youtube.com/shorts/pM5a1...
#security
#crypto
#cryptography
Had a crazy busy week but at least I got to climb! Sent this purple 5.8 clean finally and tried another 5.10a.
#Climbing
#ascendclimbing
#pittsburghclimbing
A tired BJJ purple belt taking a selfie after class
#bjj
05.10.2025 17:34 — 👍 0 🔁 0 💬 0 📌 0
A lead climber working up an arete climb
A lead climber clipping on a slightly overhanging, reachy route
A leader and belayer
Taking a fall on lead
A fun morning session with my friend Katelyn! Dipping into 5.10a again on lead and one hang finishing a fun 5.8 on the arete.
#climbing
A hiker taking a selfie on the Rachel Carson trail
A mountain biker jumping off an angled rock
Some beautiful hiking and mountain biking weather
28.09.2025 22:10 — 👍 2 🔁 0 💬 0 📌 0
Stepping up on a harder top rope solo
Pulling on two nice crimps on top rope solo
Higher on the route while top rope soloing, hanging off a nice set of holds.
28.09.2025 22:09 — 👍 1 🔁 0 💬 0 📌 0
A top rope solo climber stepping up, pulling on a crimp on a 5.9 route
A top rope solo climber pulling on crimps/side pull crimp working up a route
A top rope solo climber working up the middle of a route
Some action shots from a top rope solo session today. A few laps outside at Seldom Seen then the Climb North adult social in the evening!
#Climbing
#pittsburghclimbing
#topropesolo
Caller doesn't appreciate how rad these kids are
20.09.2025 23:42 — 👍 19 🔁 0 💬 0 📌 0
Clipping a bolt on lead
Tied in and ready to lead, using a figure 8 with Yosemite finish
Ready to climb on top rope solo, with a Ropeman and Microtraxion plus Avant lanyard and anti crossload keepers.
19.09.2025 03:36 — 👍 1 🔁 0 💬 0 📌 0
Crimping the early part of a 5.9 route on lead.
Stepping up around the 3rd bolt.
A top down photo of a climber top rope soloing a route
A top down photo of a climber top rope soloing, about to clip in to the anchor with a PAS
Great evening climbs with Ben. First lead attempts on this 5.9 project, which I've top rope soloed. Felt smooth through the first 3 bolts 😊 then TRS to clean the draws.
19.09.2025 03:36 — 👍 1 🔁 0 💬 1 📌 0
A climber selfie on top rope solo
A two strand top rope solo setup on a sandstone retaining wall.
A selfie at the top of a route on top rope solo
A train passing by on the bridge above the climbing routes
More goodies from Seldom Seen this week. Climbed my favorite 5.9 clean on top rope solo. Fresh bolt hangars after the old one's went missing...
Happy place for sure!
#Climbing
#pittsburghclimbing
A selfie while rappelling
A selfie while hiking
An extended rappel setup with third hand
A steep section of woods and rocks
A hike and rappel practice on some low angle (but steep enough) terrain at North Park.
#rappelling
#hiking
Ropeman and microtraxion setup
Selfie with ropeman and microtraxion
Ropeman and grigri setup
Microtraxion and grigri setup
13.09.2025 13:41 — 👍 0 🔁 0 💬 0 📌 0
Top rope soloing a corner
Top rope soloing a corner
Top rope soloing a corner
Chalking up top rope soloing a corner
Top rope soloing at Seldom Seen Greenway, with some new gear from Avant Climbing and HowNot2 that made the experience even smoother.
#Climbing
#topropesolo
Mount arm triangle choke
Scissor sweep
Knee cut pass
Life is short hug your friends (aggressively).
#bjj
A mountain biker selfie with helmet and light on the trail
A singletrack mountain bike trail at sunset
A lifter deadlifting 225 lbs.
A bodyweight training person performing a band assisted tuck planche
29.08.2025 02:33 — 👍 1 🔁 0 💬 0 📌 0
A lead climber backstepping on a slabby gym route
A lead climber moving at the second bolt
A lead climber clipping the second bolt on an overhang route
A climber taking a lead fall with belayer giving a soft catch
Climbing, mountain biking, strength training. Joyful movement.
29.08.2025 02:33 — 👍 2 🔁 0 💬 1 📌 0
A top rope solo climber at the anchor, showing the figure 8 and two strand setup with the selfie.
Top rope solo climbing laps at Seldom Seen! Great way to start off the day.
25.08.2025 01:15 — 👍 1 🔁 0 💬 0 📌 0
A fantastic seminar with Sinistro last week. And my teammate Andy earned his black belt!
#bjj
A climber leading a corner on trad gear
A climber leading a corner on sport
A climber leading a more difficult vertical route
A detailer and his dad enjoying a day of work on dad's truck
15.08.2025 20:31 — 👍 1 🔁 0 💬 0 📌 0
A selfie of a paddleboarder and kayaker
A selfie of two climbers a frequent climber and his wife
A climber on a steep overhanging boulder
A jiu jitsu purple belt taking a selfie
15.08.2025 20:31 — 👍 1 🔁 0 💬 1 📌 0
A top rope solo climber in a corner
A paddleboarder leaving a tunnel
A climber on autobelay side pulling and stepping with their foot
A selfie of two cyclists
15.08.2025 20:31 — 👍 0 🔁 0 💬 1 📌 0
A mountain biker on a wooden drop
A mountain biker on a rock roll
Another top rope solo corner climb
A top rope solo climber climbing a corner
Adventures from the last few weeks
15.08.2025 20:31 — 👍 2 🔁 0 💬 1 📌 0
Can you recover missing crypto seed words? How many words can be missing before recovery becomes impractical — or impossible? Find out with my latest free and open license tutorial!
📺 youtu.be/R9IP5dLghzA
📖 books2read.com/digitalsovereignty
#crypto #security #seedphrase
The chaintuts YouTube channel reached 1000 subscribers this weekend.Thank you for sharing in this journey of learning and open knowledge with me! It's been a great 6.5 years of building free and open education content — more to come!
youtube.com/shorts/jg_xw...
📖 books2read.com/digitalsovereignty
SeedWordSmith is a tool for calculating the combinations and time estimates needed to crack or recover missing seed words! This educational demo visualizes the overall feasibility of recovery. Unit tests aided by Copilot :)
github.com/chaintuts/se...
#coding #cybersecurity #copilot
