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Two-Headed Dragon
Path: EyesCollection   · Prev: TwoEyesCanDie   · Next: TheCodeSoFarEyes
    Keywords: Life & Death

[Diagram]
Diag.: Two-headed dragon

A "two-headed dragon" is a position where two eyes that are at first sight false eyes are nevertheless enough for living. To get this position, the group has to be a ring around some living group of an opponent, as in this diagram. Because the eyes are connected to each other in both directions, White cannot play at either of them first, and thus they function as real eyes, even though they have all the looks of false ones. In actual play, these positions are extremely rare but not non-existent.



Note that the definition ...

  • A virtual eye is an empty point reached by chains of the same color.
  • A group lives, if all of its chains reach the same two virtual eyes.

... covers this "beast".


See also the pages in the Eyes Collection.



Path: EyesCollection   · Prev: TwoEyesCanDie   · Next: TheCodeSoFarEyes
This is a copy of the living page "Two-Headed Dragon" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.