Pyramid Four

    Keywords: Life & Death, Shape

Chinese: 丁四 (dīng sė)
Japanese: 四目ナカデ (yon-moku nakade)
Korean: 삿갓궁

[Diagram]
Pyramid four eye space  

The pyramid four eye space (also known as four-space pyramid[1], farmer's hat, T-shape, T-four, shown here, is one of the standard unsettled eye spaces; whoever goes first wins. White plays at a to get three eyes and live. If Black plays there White is reduced to a single eye and dies.

If the surrounding situation forces Black to capture, it will take him a total of four moves, after the first one at a, to do so.



[1] From Davies' Life And Death book.

Linguistic note on Chinese

A Chinese term for the pyramid four is 丁四 (dīng sė). Observe how the four-space eye shape resembles the 丁 (dīng) character.

See also


Pyramid Four last edited by Unkx80 on August 17, 2008 - 00:19
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