Kirby wrote:
I enjoyed this video - I decided to subscribe because of it. Thanks for making it.
One thing that stuck out to me was the nuance in identifying urgent moves, which you've already identified in your gospel:
Quote:
In general, play the following classes of opening moves in order from top to bottom. There will of course be exceptions, notably when there is an urgent situation involving weak groups or when there is some local sequence with high temperature happening, but once things quieten down these principles will help you find the next biggest move. The negative numbers are common examples of these urgent local situations.
But I didn't think about it much until I saw you putting this into action. In particular, this position:
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The question that comes to mind is whether it's urgent to play 'a'. And if so, how urgent? Is it as urgent as a -3, where your 3-4 is being pressed?
It'd seem difficult to find a general principle that tells us the degree of urgency in a local position, and how it relates to the gospel. But for those "normal" situations where there doesn't seem to be something unusual happening, it seems like a decent heuristic to just follow the list.
If my 3-4 was being pressed, I'd answer that in a heartbeat over hane at
a:
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[go]$$Wc
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You can also deduce this from the gospel: it rates blocking after a 3-3 invasion at -2, lower priority than answering press at -3. That's a 1 stone vs 1 stone position, where whoever plays first takes a 2-1 advantage. It's a general principle that as more stones are added to a position it gets less important (2 vs 1 is a bigger advantage than 11 vs 10, though exceptions apply like if its a deciding liberty in a semeai!) and here the hane at a turns a 2-1 advantage into a 3-1. So that should be lower priority than the original class -2 move white should have played of blocking.
The choice in the game was hane at
a versus a class 4 3-3 invasion (the gospel had already told me that was bigger than answering one of the 4-4 approaches). If there was a class 1 empty corner available, I think I would have taken that over hane:
- Click Here To Show Diagram Code
[go]$$Bc
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A class 2 shimari or approach at
b/c, not sure, this seems like a difficult decision and probably all three choices are okay. So my feeling is the hane is somewhere around class 2 in the priority order. But as the hane is a reverse sente, I think it'd take it, and because there are 2 class 2 moves remaining I can still get tedomari.
- Click Here To Show Diagram Code
[go]$$Bc
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