3-4 point, 5-4 approach, one-space low pincer, separate

    Keywords: Joseki

When white separates with W4, Black B5 and White W6 seem to be a common continuation, at which point black must choose which side to develop, possibly with a or b.

The jump down to the second line is usually slow unless White has prospects for a severe attack, for example if White occupies the two adjacent corners as in the following diagram:

Whole board thinking  

Branch 1  

If Black doesn't want to settle this position easily, he can go for B1. White counterattacks with W2.

Old Variation  

In a gobase search, this turns up as an old pattern, played by at least Ishida Yoshio and Maeda Nobuaki. Currently professionals do not like this result for Black, since he has invested lots of stones in what still not is an eye due to a, while White has a nice shape in the corner and sente.

Modern variation  

This is the more modern variation. Playing B5 underneath is a later development in this joseki.

The old joseki  

If B5 cuts here, then we get a similar pattern as above. Black can then continue by playing at a to capture one stone and stabilize his group at the expense of good influence for White. Another option for Black is b. The downside of b is that white's marked stones still has lots of aji so black isn't thick here. Sometimes white will save them immediately.

In fact, there are some other variations, for example B7 can be extension at c to stop white taking the corner).

So, now lets compare these results to the (newer) joseki. In the new joseki white's corner is a bit bigger, but black is thicker on the outside due to the extension at B19. This extra thickness is generally judged to be of greater benefit to black than the extra points white got in the corner (afterall white is alive in both cases).

The new joseki, again  

The reason B13 is not the cut is then it would revert to the old joseki, which is not as good for black. W14 takes a liberty off the black stone preparing the trade. With B15 he abandons the corner in order to make the cut and get sente again to extend for thickness at B19, but before doing that black plays B17 in sente (otherwise he extends at W18 and white's eyes in the corner are gone).

Not so good 14  

W14 here is not good: it ends up like the old joseki but instead of giving black a ponnuki from capturing 1 stone, he captures 2 and is much stronger. Also the marked white stone has lost a liberty.

3-4 point, 5-4 approach, one-space low pincer, separate last edited by tapir on December 9, 2012 - 16:33
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Login / Prefs
Sensei's Library