3-5 point low approach, pincer, attach on approach, develop on both sides
This position can be reached in two ways:
- Via the 3-5 point low approach, two space high pincer, attach on approach joseki
- Via the 3-5 point, 4-3 approach, one space pincer, attach to approach joseki
Which reverse the order of the and stones to get to this position
Until 1963, a was the common way to continue after . But in 1963, Fujisawa Hideyuki found the tesuji b, which has been the common way to play since then.
is a famous use of the Grappling hook tesuji . After , black can defend on the left with or a point near it (c or d). White can now choose to defend the cut a or perhaps to attack with b, but can also play tenuki.
After a white tenuki, the follow-up looks like this (assuming black played ). After White can play tenuki again, because she can always get an eye at d if she so wishes, so the corner is not at risk.
Dieter: I'm afraid we cannot call it a famous tesuji without exploring it. What happens next?
fractic: Kogo's joseki dictionary paints a different picture. White's corner isn't alive yet so she doesn't have time to atari at c. Instead of Kogo suggests and goes on to show that black can't resist with at so that it just reverts to joseki with a different move order. Then again Kogo isn't allways right and it admits that it isn't sure about the punishment of .
Herman: In reponse to this: A search in GoGoD shows that first has not been played since 1962, all games from 1963 onwards have
Herman: Lets see if that's true :)
Herman: Seems to me black may be in trouble after
fractic: This does indeed look very troublesome for black. Looks like Black can indeed only cut if he can tolerate the atari.
Bob McGuigan: Ishida says that Black has to have some strength to the right to push and cut.
Herman: Seems that the only realistic chance here is if black can escape with , which is probably what Ishida means when he talks about black being strong to the right.
tderz: Black wouldn't like to give White a ponnuki and then die (as it seems here - if not black stones as near as a present).
Herman: Exactly, so the only time black can play like this is if he can escape and kill the corner. That's worth a ponnuki :-)
tderz: It should be noted that the position of here is changed with regard to the first diagram.
This has an important impact on less Black weaknesses to exploit for White.
This example shows it:
tderz: changed to the position of the other diagrams ...
and tesuji makes miai of c and cut d.
This illustrates the disadvantages of 'banging-ones-head-of-two-stone' .
It really needs a continuation of at e.
tderz: this is from a professional game: " is a good move. is powerful"
tderz: seems like forcing a ko on White, but she has in the continuation diagram below.
Dieter: Or is the move?
Dieter: With this variation?
Herman This look too good for black. is now a wasted move, and black can continue with c and seal white in completely.
tderz: It can be mentioned here, that White - by all means (as usual) - has to avoid being shut-in, ...
Andy Pierce: Can black play this way with the idea of sealing white into the corner, sacrificing if needed?
Herman: Dubious. After , white threatens double atari at a, so black cannot play b. Which would meanthat white can move along the side there.