3-4 point, high approach, ogeima
Fired off by the amateur fuseki 2 discussion, let's discuss this ogeima answer to the 3-4 point, high approach:
dieter: I think a, b and tenuki are the options to assess. Database search (gobase) in a 10x10 quadrant reveals two games with a, one game with c and three games with tenuki.
This sequence looks kind of forced. Now, can White play a ? The database search seems to support the idea that this is unfavourable for Black.
KOKIRI - the numbering here is messed up - i think this is what you mean?
kokiri: this looks fairly natural to me and good for white. a if fails to capture the two stones might be a bit overconcentrated and might give up the corner, 'm not sure
Klaus: yes, white is strong, but black got more points. Fair?
kokiri - this seems natural to me and a fairly even exchange
Dieter: Maybe the result is fair but the exchange is not. I believe both and
are mistakes.
should be at
. Hence
should be elsewhere, notably at
.
kokiri - ok - this looks like a case of playing 3 rather than 1-2-3. i will think about it.
Bill: I think the result favors Black. White is overcrowded while Black has a large territory.
The other contact play reverts to a 5-4 point joseki. The database search gives at a or b.
According to All About Joseki, the downside to instead of the usual play at
is that now an invasion by white at y is less severe because a black play at z is sente, which would not be the case with
at
.
Does White have severer plays against than with
keima at a ?
Andre Engels: Professional play tells that if black plays tenuki, white's aim is to attack at b. If white does continue here, the sequence in 'corner contact' above can be considered some kind of joseki.