two-space extension

  Difficulty: Beginner   Keywords: Opening
[Diagram]

The two-space extension

Chinese 1: 拆二 (chāi èr)
Chinese 2: 二间拆 (èr jiān chāi)
Japanese: 二間ビラキ (niken biraki)
Korean: 두칸 벌림

W2 is a two-space extension along the third line, a big fuseki point which creates a base for the group and prevents Black from attacking around the same point. This is one of the most common formations in go. The two-space extension on the third line cannot be cut without the help of surrounding stones, but can be attacked in various ways; see two-space extension - unobvious answers.

[Diagram]

Fourth-line two-space extension and large knight's extension

The Black formation on the left is also a two-space extension, but on the fourth line. The White formation is not a two-space extension, but rather a large knight's extension. Both are useful for developing groups and/or creating a base, but less stable than the two-space extension on the third line.


This is a copy of the living page "two-space extension" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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