Second line capture

  Difficulty: Beginner   Keywords: Tactics

Chinese: 二路吃

[Diagram]

Capturing on the second line

The pattern behind B1 is one of the first to occur to a beginner. The initial shape resembles a chapel, hence the name. [1] It is one of the basic edge patterns.

[Diagram]

The chapel

The white stones are captured. This is in fact also an example of a ladder.


[Diagram]

The chapel

So, the beginner learns that the descent W2 doesn't save the stones. That does not alter the fact that W2 is sometimes a good move, in particular to destroy eye shape as in the two stone edge squeeze. In some cases, neighbouring white stones mean W2 can save the original stone.


[Diagram]

Second line capture for an eye

A second line capture often (but not always) allow the capturer to create an eye at the captured stone. In this example, W1 captures the black+circle stone and ensures life with two eyes.


[1] If people know of existing names for the shape, please rename and rearrange the pages.

When I learned this pattern as a beginner, we called it the "second line trap" -- for obvious reasons. -- Michael Eisenberg


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