Xuanxuan Qijing Problem 341 / Solution
Solution 1
![[Diagram]](../../diagrams/2/7b89367d4d446e5e6b144e12de77441d.png)
Main Solution
is the key move that aims at the cut at a and effectively stops
from escaping.
![[Diagram]](../../diagrams/20/a505df6629c599d718deaad5e0783b9a.png)
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White's best try would be
.
After
, Black has to fight a ko for life.
![[Diagram]](../../diagrams/46/579da10c4e2d4b2f6fdb90bc21e9567e.png)
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Black starts the ko with
and
. By playing
at
, black takes the ko first.
![[Diagram]](../../diagrams/10/b33a7b49f2ef1a602bf056f02faff027.png)
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Black has taken the ko with
, so white has to find the first ko threat. Furthermore, black has two internal ko threats at a and b.
Solution 2
![[Diagram]](../../diagrams/40/79a7109aed2df61901b556df07affd5c.png)
Another Solution
Black can switch the order of play by starting with
.
However, Black still can't avoid the ko.
Failure
here doens't stop
from escaping; White can kill without ko.
is the same for
at x.
Starting with
or x is a good way to kill one's own group in gote.