Grappling hook tesuji

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    Keywords: Tesuji
[Diagram]
Tesuji  

http://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Grappling_hook_2_%28PSF%29.png/274px-Grappling_hook_2_%28PSF%29.png?alignright.jpg

In the grappling hook tesuji[1], a player uses the diagonal jump of B1 to attach behind an opponent's stone.

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 B1 or B




Table of contents Table of diagrams
Tesuji
Hamete?
Guo Fan (W) - Li Baixing c. 1100
Guo Fan - Li Baixing (ii)
Guo Fan - Li Baixing (iii)
Guo Fan - Li Baixing (iv)
[Ishida Akira] (W) - Nakano Yoshihiro, 2001
Skillful play
Ishida - Nakano (game continuation)
Ishida - Nakano (game continuation II)
[O Rissei] (W) - [Kajiwara Takeo]
O - Kajiwara (ii)
O - Kajiwara (iii)
[Shimamura Toshihiro] (W) - [Kitani Minoru]
Shimamura - Kitani (ii)
Shimamura - Kitani (iii)

Examples from Joseki

Hamete/Handicap-Joseki

[Diagram]
Hamete?  

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' .


Examples from professional play

Oldest recorded use

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)

[Diagram]
Guo Fan (W) - Li Baixing c. 1100  

With W56, white threatens to connect under. After black prevents this, white uses the grapping hook tesuji with W58 with the purpose of making life in the corner. black prevents white from connecting, after which white plays the hane of W62, which is also a grappling hook from the point of view of white+circle.

[Diagram]
Guo Fan - Li Baixing (ii)  

Heavy fighting breaks out, with neither player giving an inch

[Diagram]
Guo Fan - Li Baixing (iii)  
[Diagram]
Guo Fan - Li Baixing (iv)  

B87 @ black+circle
W88 @ black+square
W90 @ black+circle

With W92, white finally secures life in the corner.

Example game 1

[Diagram]
Ishida Akira (W) - Nakano Yoshihiro, 2001  

B6 looks like a new move in this joseki.

Herman: Black is willing to sacrifice either B6 or B2/B4 in exchange for a good result here. Many players might be tempted to play a, but that will give white a bad result

[Diagram]
Skillful play  

Herman: If White plays W1 in response to black+circle, black sets up a driving tesuji with B2. White will now either have to sacrifice white+circle, giving black a ponnuki in the center, or suffer severe damage to his corner through the sequence shown.

[Diagram]
Ishida - Nakano (game continuation)  

In the game, White played W7, preventing the possibility of a driving tesuji. With this option gone, black defended the weakness of his diagonal jump, and play continued as shown.

[Diagram]
Ishida - Nakano (game continuation II)  


Example game 2

B1 - B5 show Kajiwara's creativity. After W4 White looks a bit overconcentrated on the left side.

[Diagram]
O - Kajiwara (ii)  

So Black can freely sacrifice the marked stones.

[Diagram]
O - Kajiwara (iii)  

The tesuji of B1 is the same concept of some suboptimal variation of the 4-4 point double kakari joseki. (See easy way out of a double kakari.)


Example game 3

B1 shows Kitani's creativity. B5 forces White low on the top side.

[Diagram]
Shimamura - Kitani (ii)  
[Diagram]
Shimamura - Kitani (iii)  

[1] The name "grappling hook tesuji" was coined on Sensei's Library by Herman Hiddema, and is not found in literature.


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Grappling hook tesuji last edited by HermanHiddema on November 20, 2013 - 11:33
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