A ko as a ko threat
In this game, there's a big ko going on at the bottom. Black plays
as a ko threat which in itself enlarges the ko at the right side.
White takes the ko at
and resolves it at
. Black does likewise with
and
.
What's the value of this ko exchange? Let's evaluate the position if both had won the other ko:
Compared to above diagram
makes 3 points, destroys 9 more and next a jump at a destroys 8 more in gote. Difference = 16
White makes 10, destroys 15 and also removes some aji (b is no longer sente). Difference = 25+.
Overall the exchange favors Black. Perhaps White saw the right side as potentially disconnected from the centre?
tapir: Shouldn't we determine status before counting territories? How does White live if she does not connect?
![[Diagram]](../../diagrams/2/af6f862549a7cb973fd8ab3126b38550.png)
![[Diagram]](../../diagrams/22/4c842c8823b31b9e6e6b6d6b70ad236e.png)
![[Diagram]](../../diagrams/14/3136de9785327e5b1518ff8fb7ff4cbe.png)
2024 the Authors,
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