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

the bump (1)  

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

the bump (2)  

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

the bump (3)  

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

continuation (1) of bump  

tderz: After , Black defends at and White can counter-pincer at .

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

white tesuji if Black tenukies on the left  

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

Inoue Ichiro - Kitani Minoru (09.11.1927)

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  

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

Often black a, white b is exchanged.

another starting point  

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

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

tderz: Black is too far away from the white mini-wall to be efficiently controlled by .
Also 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.

exchanging once without aji-keshi  

tderz: After -, White could slide to a.
It is important only to exchange for , 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.

how to keep black low on the bottom  

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