Furikawari

  Difficulty: Advanced   Keywords: MiddleGame, Strategy, Go term

Chinese: 交换 (jiao1 huan4); 转换 (zhuan3 huan4)
Japanese: 振り替わり or フリカワリ (furikawari)
Korean: -

Furikawari is a Japanese go term meaning an exchange of potential territories. It is frequently used to describe situations where potential territory is exchanged for influence or two territories are exchanged, and usually involves sacrifices and squeeze plays. In English, the term is often translated, simply, as exchange.

A ko furikawari occurs when one player ignores a ko threat to win a ko.[1]


Introduction

Many types of furikawari can occur in real games. For example, a player may sacrifice territory on the side to gain territory in the opponent's corner. In another example, a player invading a large framework may live inside, but at the cost of the opponent building-up large influence. Thus, a furikawari may occur between two territories, between two influences, or between territory and influence.

The key to successfully using furikawari is to use them to maintain territorial and influential balance.


Example 1

[Diagram]
Hong Seong-Chi (W) - Baek Hong-seok (B), 2009-11-14  
[Diagram]
 
[Diagram]
B47 at a  

After B47 at a the exchange of black+circle for a deep framework comprising the whole top left is complete.


Example 2

[Diagram]
Taisha variation  
[Diagram]
Continued  

After W1, B2 trades the corner for a position on the left side and cutting off the white+circle stones on the top side.


Example 3

[Diagram]
Honinbo Shusai (W) - Go Seigen (B), 1929  

According to Go Seigen, after W1, the furikawari of B2 and W3 is necessary.[2]


Example 4

A huge furikawari was seen in Sakata (7p, White) against Takagawa (7p, Black) in the 1952 Honinbo Challenger Playoff. Takagawa, the underdog in this game, allowed a huge right-side moyo to be killed, in return for taking the left side. He was about 20 points ahead when Sakata resigned. This brilliant game enabled Takagawa to challenge for the Honinbo title, the start of his famous series of nine wins in a row.


Notes

[1] Or make an approach move in an approach ko. [2] From Now I Would Play This Way?, p. 34.


See Also


Furikawari last edited by 185.220.101.15 on June 20, 2018 - 18:45
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