3-4 point, 5-4 approach, one-space low pincer, moving out
Table of contents | Table of diagrams Moving out Moving out Joseki Follow-up Alternative joseki Joseki Joseki Old joseki A new variation Cho Hun-hyeon's line Cho Hun-hyeon's line (continuation) |
Black seems to have two standard answers: the extension to a and attaching with b according to Ishida's Joseki Dictionary. Essential Joseki by Rui Naiwei shows c as a possible Black response to .
1.1. Extension
White can now attach at a or press at b.
AJP: I was stunned to find that Kogo's lists a as inferior for white. See [100].
Bill: Since when is Kogo's authoritative? A quick search on GoBase does not seem to support that assertion.
1.1.1 Attach
White has an interesting ko to follow up with, if Black plays tenuki after the previous diagram. If Black a, White b makes a picnic ko. If Black c, White a is humiliating for Black.
To avoid the ko above, some people choose to play here instead. This way, White does not have the follow-up which leads to the ko, but White gets to play the large endgame move at a in sente.
1.1.2. Press
White gets influence along the left side and sente. Black's profit in the corner is considered superior locally, so has to be effective in the context of the whole board.
See BQM34. Labelled 'obsolete joseki' in the Kobayashi Koichi Dictionary. leaves bad aji here,
seems to be aji keshi therefore. Nowadays
is at a.
1.2. Attach
White can play a for central influence or b for preventing Black's connection.
at c is also joseki, a more recent idea and currently much more popular.
The old joseki was this, with White playing tenuki after despite the cutting point at c. If Black cuts there White treats the stones including
and
as disposable.
This is a variation with the 'new' that has been played by top players. We probably assume Black wanted a framework on the left side here, making
an important point in the centre.
This line has been played in a number of games of Cho Hun-hyeon (on the side of White).
White must continue to run out after , Black a, naturally. White has made a ponnuki on Black's 'framework' side. White has a quite thin development on both sides.