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chaintuts.bsky.social
chaintuts
@chaintuts.bsky.social
160 followers 190 following 190 posts
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
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chaintuts.bsky.social
I'm excited to share I'll be speaking at the Hackers Guild PGH 2025 Guild Con next Saturday, Nov 22. I'll be covering Cryptography for Hackers and Engineers, an all-level introduction to the cryptography we use every day!

#cryptography
#hackersguild
#techeducation
November 16, 2025 at 12:07 AM
chaintuts.bsky.social
An Epiphone SG standard on a chair A 5 string Squier Jazz Bass on a chair An Epoch (Gibson/Baldwin) LP4 and Dean Edge 9 on a chair. A Yamaha F325 acoustic leaning up against a chair with an Epoch LP4 and Dean Edge 9 bass
November 16, 2025 at 12:05 AM
chaintuts.bsky.social
Occasional bedroom (office?) musician off and on since I was a kid. I've been enjoying playing this indoor cozy season.

#guitar
#bass
A 5 string Squier Jazz Bass and Epiphone SG sitting on a chair A 5 string Squier Jazz Bass, Epiphone Sg, Yamaha F325 acoustic leaning on the office wall A 5 string Squier Jazz Bass, Epiphone Sg, Yamaha F325 acoustic, Epoch LP4, and Dean Edge 9 leaning on the office wall A Hartke bass Amp with Boss super overdrive and Nux tuner pedal
November 16, 2025 at 12:05 AM
chaintuts.bsky.social
A climber working up a 5.10b overhanging lead route A wide shot of a climber and belayer on an overhanging lead wall. A climber on a short overhanging top rope route looking back at belayer at smiling. A climber and belayer tied in preparing to lead.
November 15, 2025 at 11:55 PM
chaintuts.bsky.social
Some more recent climbing adventures. Working on lead head and confidence has been helpful.

#climbing
A climber twisting their hips on a 5.10c vertical route. A climber stepping on a 5.10a lead. A climber working up an overhanging lead wall. A climber pulling on a 5.10a vertical route.
November 15, 2025 at 11:55 PM
chaintuts.bsky.social
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
October 13, 2025 at 11:41 PM
chaintuts.bsky.social
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.
October 13, 2025 at 11:41 PM
chaintuts.bsky.social
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
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.
October 13, 2025 at 11:41 PM
chaintuts.bsky.social
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
October 5, 2025 at 5:35 PM
chaintuts.bsky.social
#bjj
A tired BJJ purple belt taking a selfie after class
October 5, 2025 at 5:34 PM
chaintuts.bsky.social
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 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
September 28, 2025 at 10:13 PM
chaintuts.bsky.social
Some beautiful hiking and mountain biking weather
A hiker taking a selfie on the Rachel Carson trail A mountain biker jumping off an angled rock
September 28, 2025 at 10:10 PM
chaintuts.bsky.social
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.
September 28, 2025 at 10:09 PM
chaintuts.bsky.social
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
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
September 21, 2025 at 12:09 AM
chaintuts.bsky.social
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.
September 19, 2025 at 3:37 AM
chaintuts.bsky.social
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.
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
September 19, 2025 at 3:37 AM
chaintuts.bsky.social
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 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
September 16, 2025 at 1:10 AM
chaintuts.bsky.social
A hike and rappel practice on some low angle (but steep enough) terrain at North Park.

#rappelling
#hiking
A selfie while rappelling A selfie while hiking An extended rappel setup with third hand A steep section of woods and rocks
September 13, 2025 at 1:44 PM
chaintuts.bsky.social
Ropeman and microtraxion setup Selfie with ropeman and microtraxion Ropeman and grigri setup Microtraxion and grigri setup
September 13, 2025 at 1:41 PM
chaintuts.bsky.social
Top rope soloing at Seldom Seen Greenway, with some new gear from Avant Climbing and HowNot2 that made the experience even smoother.

#Climbing
#topropesolo
Top rope soloing a corner Top rope soloing a corner Top rope soloing a corner Chalking up top rope soloing a corner
September 13, 2025 at 1:41 PM
chaintuts.bsky.social
Life is short hug your friends (aggressively).

#bjj
Mount arm triangle choke Scissor sweep Knee cut pass
September 13, 2025 at 1:36 PM
chaintuts.bsky.social
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
August 29, 2025 at 2:33 AM
chaintuts.bsky.social
Climbing, mountain biking, strength training. Joyful movement.
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
August 29, 2025 at 2:33 AM
chaintuts.bsky.social
Top rope solo climbing laps at Seldom Seen! Great way to start off the day.
A top rope solo climber at the anchor, showing the figure 8 and two strand setup with the selfie.
August 25, 2025 at 1:15 AM
chaintuts.bsky.social
A fantastic seminar with Sinistro last week. And my teammate Andy earned his black belt!

#bjj
August 25, 2025 at 1:13 AM