Quintuple Ko
Difficulty: Expert Keywords: Ko
A Quintuple Ko is an extremely rare situation in which there are five interrelated kos, and a resulting cycle of ten moves, which will result in a void game under some rules, or in a complicated ko fight under others.
Example
There is no known example from professional play, but it is rumoured to have occurred in amateur play in Japan.
An example from actual play would be most welcome.
For an example, see
Quintuple Ko.
Constructing an example
Attempts welcome.
![[Diagram]](../../diagrams/13/bb459335c2c5989ed5b02c0dbd6706c2.png)
![[Diagram]](../../diagrams/19/b24dd1aaec73debef9781592a21e3456.png)
-
, the position has reversed to the next diagram.
![[Diagram]](../../diagrams/42/8439712f1fd25b398d306f7f6ccbe5c7.png)
![[Diagram]](../../diagrams/21/05fce9b2c64f25791d528042eb9f1b2c.png)
, white can take at
as an internal ko threat.
2024 the Authors,
published under the ![Sensei's Library [Welcome to Sensei's Library!]](../../images/stone-hello.png)