Grappling hook tesuji
This is usually played when pushing through at a is a bad move for white, and is generally a light play, where black is willing to sacrifice either or
- 3-5 point low approach, pincer, attach on approach, develop on both sides
- 4-5 point 4-3 approach inside contact, follow-ups (diagram 3)
tderz: The Chinese translation of a Korean book just used 碰 pèng - attach to the side
and not the thinkable 'jump-attach' or 'elephant(-jump)-attach' .
Herman: Oldest use of this tesuji that I can find is Guo Fan - Li Baixing, played around 1100 CE and recorded in one of the oldest extant books on go, Wangyou Qingle Ji (this game can be found in GoGoD as 1150C&IP09)
With , white threatens to connect under. After black prevents this, white uses the grapping hook tesuji with with the purpose of making life in the corner. black prevents white from connecting, after which white plays the hane of , which is also a grappling hook from the point of view of .
With , white finally secures life in the corner.
looks like a new move in this joseki.
Herman: Black is willing to sacrifice either or / in exchange for a good result here. Many players might be tempted to play a, but that will give white a bad result
Herman: If White plays in response to , black sets up a driving tesuji with . White will now either have to sacrifice , giving black a ponnuki in the center, or suffer severe damage to his corner through the sequence shown.
In the game, White played , preventing the possibility of a driving tesuji. With this option gone, black defended the weakness of his diagonal jump, and play continued as shown.
- show Kajiwara's creativity. After White looks a bit overconcentrated on the left side.