Bulky Five

  Difficulty: Beginner   Keywords: Life & Death

Chinese: 刀把五 (dāo bǎ wǔ); 刀板五 (dāo bǎn wǔ); 刀柄五 (dāo bǐng wǔ); 刀五 (dāo wǔ)
Japanese: -
Korean: 오궁도화 (ogungdohwa, 五宮桃花)

Bulky five refers to a particular nakade shape of five points, i.e. an unsettled eye space, needing one more move to be sure of two eyes.

[Diagram]
Bulky five  

The vital point of the bulky five is the circle point. If White plays there, he is alive. If Black plays there, White is dead.



White can also live by playing at a (creating a bent four) or at b (creating a twisted four).

However, there are two points worth noting:

A play by White at the circle doesn't have these problems.


[Diagram]
Almost filling the bulky five  

Black can almost-fill the bulky five into a pyramid four (as shown) or a squared four.

[Diagram]
White is dead  

Subsequently, when White plays at white+circle, B1 kills. White is dead.


Linguistic note on Chinese

[Diagram]
Bulky five  

Chinese terms for the bulky five include 刀把五 (dāo bǎ wǔ), 刀板五 (dāo bǎn wǔ), 刀柄五 (dāo bìng wǔ), 刀五 (dāo wǔ). All of these terms refer to the fact that the eye shape looks like a knife. Specifically, the knife has a blade and a handle, and these are joined up at the circle point. Incidentally, the place where the blade and the handle joins (circle) is also the vital point of the bulky five.

erislover: I think I have heard this called a "hatchet five" or something quite similar. To me, it looks like a butcher's meat cleaver.

unkx80: Actually, I think the bulky five is also known as "knife five".

Andrew Grant: I've removed the text 五目ナカデ (gomoku nakade) from the CJK box as "gomoku nakade" is not equivalent to "bulky five". Bulky five refers to one type of gomoku nakade only. There's also the cross-five shape.


See also


Bulky Five last edited by Malcolm on August 4, 2020 - 19:32
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
RecentChanges
StartingPoints
About
RandomPage
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Goproblems.com
Login / Prefs
Tools
Sensei's Library