Dwyrin
Dwyrin is the Internet identity of a US based amateur high dan who does online teaching and demonstrations of Go games, primarily via his youtube channel.
The channel features two series: "back to basics" on Fridays and "Murder Monday".
Basics
Dwyrin's basics are, non-exhaustively
- first corners, then sides, then center
- territory rather than influence - influence is harder to play with
- protect your weak groups first
- when "behind enemy lines", defend - usually by jumping across the sector line or making a base
- weakness depends on proximity of own/enemy stones, clear weak points or cutting points
- make shape and poke at your opponent's shape
- aim for sente - always ask yourself: "do I have to respond here?"
- find the biggest area - an easy heuristic here is the number of empty points between two stones (usually corner positions)
- an enclosure and its extension are miai: if your opponent takes one, you take the other
- when invading, look for multiple options (jumping out, making a base)
- there is no reason to fight. Usually the thing (a stone, a piece of territory) is not worth fighting over. Just take larger points
- the outcome of a fight is unpredictable; in particular you might lose sente and it's the opponent who takes a large point
- you can't always back off though: when your opponent does something unreasonable, he shouldn't get away with that easily
He's mildly critical of the new variations introduced by AI bots, notably the early 3-3 invasion, or at least advises against its mindless imitation.
Dwyrin has coined the term winning condition as a mental device for determining your strategy.
Here is a meta-video on his basic series. Some quotes
- "don't rely on a crutch"
- "your opponent will give you many opportunities to show your superior direction of play"
Basics exist on many levels. Here's his video about basics on double digit kyu level: https://www.youtube.com/watch?v=ltGBqeYVf7o