{{Short description|Concept in Go}} {{nofootnotes|date=November 2010}} {{Nihongo|'''Ponnuki'''|ポン抜き|ponnuki|{{CJKV|t=開花|l=open flower|s=开花|p=kāi huā|k=빵따냄 ppang-ttanaem or 빵때림 ppang-ttaerim}}}} is a Japanese term in the game of Go that refers to capturing a single stone, resulting in a diamond shape. The shape of the remaining capturing stones is considered to be very strong, due to its influence in all directions. A certain Go proverb says: "A Ponnuki is worth 30 points".
{| align="right" style="border:1px solid black;padding: 1px;text-align: center" |{{Goban 9x9|<!-- 1 --> | | | | | | | | |<!-- 2 --> | | | | | | | | |<!-- 3 --> | | | | | | | | |<!-- 4 --> | | | |b| | | | |<!-- 5 --> | | |b1|w|b| | | |<!-- 6 --> | | | |b| | | | |<!-- 7 --> | | | | | | | | |<!-- 8 --> | | | | | | | | |<!-- 9 --> | | | | | | | | |20}} Ponnuki move by Black 1 |}
A diamond shape (4 stones touching the same empty spot) is considered a ponnuki only when constructed by capturing the middle stone.
Depending on the context (other stones on the board), a ponnuki may be strong and thick but inefficient (''overconcentrated'').
== Etymology == The word ''ponnuki'' (ポン抜き) breaks up into ''pon'' and ''nuki'', in which ''pon'' is the sound of a cork when taken from a bottle, while ''nuki'' means "taking out" (noun), the expression means, 'to pop the cork', a poetic reference to taking the stone out of the centre.
==References== * [http://senseis.xmp.net/?Ponnuki Ponnuki on Sensei's Library]
{{Go (game)}} Category:Go shapes