3-4 point high approach, two-space high pincer, bump

    Keywords: Joseki

Table of contents Table of diagrams
development of the bump
the bump (1)
the bump (2)
the bump (3)
continuation (1) of bump
white tesuji if Black tenukies on the left
Yoshida - Ishii
Pushing through
another starting point
tewari - with the two-space-high-pincer, the bump is not advisable
jumping once or twice with iken-tobi
exchanging once without aji-keshi
how to keep black low on the bottom

tderz Copied from Quick questions:
reply139.55.34.248: 34 high approach, two space high pincer, bump permissible? (2005-11-02 06:41) [313]

noseki? ladders are good for white. can white play this way if she wants to keep black low on the left side?

[Diagram]
development of the bump  

[Diagram]
the bump (1)  

tderz: There are actually some examples (5 on gobase) in Go history when Black black+circle is one more to the left (c).
Black has basically two choices: a & b.

[Diagram]
the bump (2)  

tderz: B1 has to be answered by W2 (not true, there is also a game where White jumps to a), vice versa B3.
After B3, White has the normal techniques hanging conection b and the double-hane c as alternative continuations.
Both end in (very local) sente for White.

[Diagram]
the bump (3)  

tderz: this could be considered a natural continuation for both.
What will be White's next move?

[Diagram]
continuation (1) of bump  

tderz: After W1, Black defends at B2 and White can counter-pincer black+circle at W3.

Actually I did not find any professional games with black+circle in this position, only if black+circle is at a (W3 is then at c).


Tesuji

[Diagram]
white tesuji if Black tenukies on the left  

tderz: If Black does not defends at B2 above, then
W3 here is tesuji.

Inoue Ichiro - Kitani Minoru (09.11.1927)

[Diagram]
Yoshida - Ishii  

tderz:

 Event     Oteai,1974,Japan,
  Black     Ishii Kunio, 8p
  White     Yoshida Yoichi, 7p
  Komi     0
  Date     1974-04-18
  Place     Japan
  Result     W+R

The next moves were White a and Black b!


Pushing through

[Diagram]
Pushing through  

tderz: If Black pushes through with B2 and cuts at B4,
then White can get some grip on black+circle, because she is assured of an atari a. Hence white could extend with W7 to circle or so.

Often black a, white b is exchanged.


Tewari Analysis

[Diagram]
another starting point  

tderz: Sometimes, White also starts like this, because she knows about black's weakness around a,b.

[Diagram]
tewari - with the two-space-high-pincer, the bump is not advisable  

tderz: Black black+circle is too far away from the white mini-wall to be efficiently controlled by W1.
Also W1 is too far away from white allies that the whole procedure would work.

Hence, my conclusion is:

If Black made the two-space-high-pincer, the bump is not advisable.

Alex: I agree with your conclusion. How is this tewari, though? I thought tewari meant analysis by either changing the order of moves or removing superflous pairs (one White, one Black) of stones, neither of which you've done here.


Andy Pierce: follow-up question: if the bump is not advisable, but white really wants to keep black low on the left side as shown, is there a better alternative than the bump, or does white just accept that this achieves her goal, at a local loss?

Rich: The two-space jump keeps black low.

[Diagram]
jumping once or twice with iken-tobi  

tderz to Andy: as Rich says, if you simply jump, you keep black low (if that is your aim). Also the one-point-jump will do. Of course, Black could also jump to j, that's another story.

After e.g. W4-B7, White could exchange a for b, then counter pincer at c .

[Diagram]
exchanging once without aji-keshi  

tderz: After W3-B4, White could slide to a.
It is important only to exchange W1 for B2 , as white-m - black-n would be aji-keshi.
If Black ever peeps at p, then white can connect nicely with q-r-s and Black seems wanting to cut a bamboo (bad shape).

Furthermore, if Black ever cuts some stones off from the center, White still has a sabaki-aji for making life in the corner with White double-hane n.


Game record

Here is the game record in question:

[Diagram]
how to keep black low on the bottom  

Andy Pierce: I played W6 thinking to press black low on the bottom side since B3 and B5 are both low. When black played the two-space high pincer B7 my thinking was that I can't really play the one point jump due to B1, but maybe the lighter two point jump would have been ok. On the other hand I could have approached at a before W6 to see how black responds first.


3-4 point high approach, two-space high pincer, bump last edited by Dieter on July 5, 2008 - 14:28
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