6-4 point josekis
Work in progress
- a to c are viable ideas, d looks vulgar, e is an idea to transpose into the small avalanche.
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A genuine joseki
White's approach here gives a position that is characteristic of the 6-4 point, rather than a tenuki joseki. It is also by far the most common answer. Second most common is at a: others are not really seen in professional play.
Black b next is most usual and Black c is known. Black at d or e to pincer have been played by Yamashita Keigo and others.
This line has appeared in enough pro games to be recognisable as a joseki in the making. At the choice is between a and b.
If Black connects with , both players establish a position up to , after which Black can choose between , and tenuki.
With , Black opts for influence, granting White the corner. After , Black can play tenuki or play honte at a, a solid but slow move.
Note: The only games in my collection where is played are very old, from ~1940. This is not the case for the previous diagram, which seems to have been popular in China in the first half of the 1990s.
Joseki similar to common (tenuki) joseki
When white enters on the 4-4 point, gives a conversion to the severe 44 point double high approach.
gives a conversion to a common joseki, which can be reached through Black at , White at , Black . The next move is White a: see 3-4 point high approach, keima
- This variation ( here): 3-4 point distant high approach, tenuki, inside contact
The play at c
some lines given by kogo joseki and non-joseki database...
e.g. kitani minoru vs sekiyama riichi 1935-02-01
The 8 points white gets in gote is worth far less than the influence black gets.
tapir: btw. eidogo (i don't have access to some bigger database right now) has a game between choi cheolhan and lee seongjae featuring at 6-4, 5-3 but then black attaches on the second line :)
Attachment at e
This way, it reverts to the small avalanche joseki.
emeraldemon: Gan Siyang Seems never to play this way, prefering (no surprise) to go for influence: