Sanrensei fuseki

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    Keywords: Opening, Go term

Chinese: 三连星 (san1 lian2 xing1)
Japanese: 三連星 (san ren sei)
Korean: 삼연성 (三連星)

San-Ren Sei means roughly "three star points in a row" in Japanese.

It is the name applied to the formation adopted by both players in the diagram below. This is one of the popular opening formations for Black in modern Go.

Its most famous supporter and promoter among the top professionals is Takemiya Masaki who almost invariably plays it as Black.

[Diagram]

Opposing sanrensei

Here both Black and White continue from an initial nirensei and set up sanrensei formations on opposite sides of the board. Although this approach for White is possible, it is probably more common in actual play to see White use W6 to approach Black's formation at a.


Strengths and weaknesses

The sanrensei is an influence-based approach rather than a territory-oriented one. Black will tend to build large, relatively loose frameworks, that only turn into territory later in the game as the middle game struggle progresses. It by a natural process becomes a fighting approach as White is usually forced to invade Black's framework(s) in order to prevent them from turning entirely into territory.

Choosing the sanrensei is in a sense a narrower or less flexible strategy than moving around more speedily from a nirensei formation. Black concentrates his resources on only one side of the board and waits to see how White will try to handle the situation. Despite having played on only one side, Black should be ready to react in different ways to White's counter-plan.

Notes

See also


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This is a copy of the living page "Sanrensei fuseki" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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