It is currently Sun May 22, 2022 5:13 pm

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 1 post ] 
Author Message
Offline
 Post subject: symmetric joseki
Post #1 Posted: Tue Nov 23, 2021 10:16 pm 
Lives in gote

Posts: 363
Liked others: 54
Was liked: 260
Rank: UK 2d Dec15
KGS: mathmo 4d
IGS: mathmo 4d
As a beginner I used to wonder why joseki were symmetric.

Here is some analysis.



edit 20220511: My current understanding of local fights is
If both sides are weak, respond tightly, pressing any advantage you have.
If the opponent is strong, balance local points and strength with side development and centre access.

The symmetry is more an indication of patterns of best moves rather than anything general. If the opponent doesn't play joseki, you shouldn't mirror. However, the question remains as to why josekis have mirrored outcomes.

A partial answer is:
1) if the opponent has a good move at A, the mirror option is obviously a good move too. (though it might not work with the previous move)
2) the opponents best move is your own

Hence, play the mirror.

This implies the joseki assumption
3) Moves are focused on the corner, assuming empty space (all else equal) on the sides.

The normal deviations from the mirror are due to strength and weakness
a) If the opponent plays too close, you may play closer to them to attack
b) If you have extra support (e.g. first move in the corner), then you can try to claim slightly more with your 2nd move (normally that means play 4th line rather than 3rd).


Attachments:
symmetric joseki.sgf [6.69 KiB]
Downloaded 144 times

_________________
Give me triangles strong enough and I can measure the universe.

When Venus transits, we can align our clocks to one event. By measuring the angle to flat Earth at two places far apart on Earth, we can compute the distance to Venus and the Sun.
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group