Ko threat in seki example
Let us consider this position as a source of ko threats.
First assume Black is to play. How many ko threats does Black have here?
Black can play
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as a long threat. Since
is atari, stopping there isn't good for a small ko. And for a large ko the threat of
, to make six points, isn't interesting.
Note that Black neither gains nor loses points here.
Is therefore this position an example of a double ko threat? White has one threat here worth over 20 points. Black can get two lesser threats. In a small ko White will remove this double threat. Black can theoretically remove it, too (cf. slightly different example at unremovable ko threat). In a larger ko White will have no reason to remove the threat, and Black's plays to remove the threat may instead be gote.
This is therefore a more complex example for the remove double threats before you first capture the ko heuristic.
![[Diagram]](../../diagrams/51/839509936aa7fc9a41b0bd2319dfdda8.png)
![[Diagram]](../../diagrams/2/cfc8d9e2982e5ff09e2a73add891002d.png)
![[Diagram]](../../diagrams/1/6f558870d2138406728aaab33cb6213e.png)
![[Diagram]](../../diagrams/37/38473224afea052a547bb9bd6b47d19a.png)
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is a clearcut threat.
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published under the ![Sensei's Library [Welcome to Sensei's Library!]](../../images/stone-hello.png)