There is Death in the Hane

  Difficulty: Beginner   Keywords: Life & Death, Proverb

This proverb, "There is death in the hane", refers to the fact that the hane on the first line is a very common method of killing groups. The main purpose of the hane is to reduce the space for making eyes.

Example 1

Example 1  

The hane at W1 kills the Black group by reducing the eye space to a bulky five dead shape. If Black tries to capture at a, this does not gain an eye.

Example 2

Example 2  

This Black group (an L+1-group) can be killed with the hanes at W1 and W3. If Black blocks at a, Black's interior space is a dead bulky five. White can then kill Black with a placement tesuji at b. If Black tries playing b instead, then white will play a.

Notice that in the above examples, the hane stone is not defended when put into atari. Instead another hane or a placement follows. That is because capturing the hane stone will result in a false eye, and White can easily prevent Black from escaping to the outside (see preventing escape on the first line).

See also:

There is Death in the Hane last edited by xela on January 2, 2024 - 12:44
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