I would appreciate some advice on how to improve my assessment of a (relatively simple) 9x9 situation in a game I completely misjudged.
In this game, by move 19 I reached the following conclusion (all wrong, it turned out):
I have two weaknesses: top left (B7) and bottom right (F1)
There is no chance I can go through the center of B’s wall at E4 or E6
Even if I manage to fix the TL and BR weaknesses, I’m still going to lose by a 3/4 points.
I concluded I might as well try a 3-3 invasion which I had no idea it will succeed or not. In the worst case I would learn something about invasions in cramped spaces.
So I played G7. And lost the game (well, technically I won it by time out, but I should have lost it).
I definitely learned something about 3-3 invasions, but the interesting part came in the post-game AI review, when I learned that my original assessment was completely wrong. In particular, I should have played E6 and charged through the center, an option I had considered impossible.
My question (which the AI can’t answer) is: what is the reasoning behind W E6 at move 20? Is it pattern recognition accumulated after many games? Or is there a strategic principle at play? Or it just reading ahead all the moves from E6?
Or a combination of those?