More unexpected Mario content: a 7-minute video speedrunning composite by FlibidyDibidy:

This video combines my first 5,162 attempts to speedrun Super Mario Bros. I recorded 193 hours of attempts (and practice) on an original 1985 Nintendo Entertainment System, then I wrote a custom computer program to process those videos and combine them via machine learning and conventional image processing techniques.

This is not just fun to look at, and – presumably – study as you’re speedrunning yourself. A sign of a good visualization is that it makes you see stuff that you haven’t before and here, at some point (after 1:42), you start noticing strange comb-like patterns in Mario running.

Turns out this is actually a thing called a “frame rule,” a quirk of game’s timing code where it only checks for a completion of the level every 21 frames, or one third of a second. That means that for every level after the first one, your start will be rounded up to the nearest 21st frame:

The analogy often given is to think of a bus that leaves every 21 frames, and levels can only end by getting on that bus, and so other than in the last level (which has no new level to load at the end of it), improvements in Super Mario Bros. can only happen in 21 frame increments. If you save a frame or two in a level, but it’s not enough to make the previous frame rule, it’s not enough to take the previous bus, you’ll just end up waiting for it to happen anyway.

Stay tuned to the end of the video for some fun stats, and click through in the description below to see the same tech applied live during an in-person speedrunning event.

I mentioned speedrunning before in the context of mastery, but there is the other side of speedrunning that’s equally interesting: that utilizing bugs (or, glitches) to get the fastest possible time.

This 17-minute video by Msushi covers “one of the most loved and broken glitches in Portal 2” and the strange relationship the community has in following a bug to its conclusion – which, in this case, is not fixing it, but creatively using it to shave of speedrunning time. (There is an element of mastery there too, with spawning and despawning, but I don’t want to spoil the surprise.)

September 6, 2014, was a landmark day in speedrunning history.

I like Summoning Salt’s videos about speedrunners because they manage to add a great dose of storytelling to what otherwise would be boring, mundane events, and this one about Punch-Out is no exception. It’s Rocky meets Moneyball, in a way.

This pairs well with the previous review of the “Pilgrim in the microworld” book because speedrunning feels very connected to mastery and to quality – whether it’s because of the old-fashioned grind to be better, or by exploiting all sorts of glitches in the game to shave off sometimes milliseconds. The video above is in the former category, or what speedrunners would call “glitchless.” It’s also just really fun to watch. (The book wasn’t fun to read.)

If you’re new to learning about speedrunning/​glitchless, this video about “rolling” in Tetris (which itself is kind of mindblowing), and then this one about new Tetris developments from aGameScout are a great entry point.