Beginner Exercise 45 / Discussion
| Table of contents | Table of diagrams White is independently alive Failure: Seki Failure: Ko No capture without ko White is dead White is dead again Failure: Seki |
White first
![[Diagram]](diagrams/33/3aa0061137370f4a806dbfe1c7def432.png)
ChrisSchack: White first, I guess . . . the easy case. White lives in gote, one eye to none, with 9 points.
Robert Pauli: In real life, 
should be spared as a ko threat.
![[Diagram]](diagrams/32/3daccac3bbc656bab287b376eda2c905.png)
AdamMarquis: Since it is a beginner exercise, should this case not also be pointed out? Black's descent to the edge after White takes the throw-in makes it so that White can't approach. The result is seki (with a sending-two-returning-one option for White).
![[Diagram]](diagrams/51/474295e015d3a0da2347525ea0ae7e91.png)
What if black takes
though? Won't black have killed white without ko? -Ned G.
Brent: Well, in that case it would simply be a ko that Black didn't fight. (= If Black captures
and once after Black captures
. See ko fights for a more detailed explanation.
Bill: Don't be confused by the diagram. Black cannot take
below) without taking the ko.
![[Diagram]](diagrams/48/54b83bed33a90ca28d96efd9f9f22d72.png)
Black first
![[Diagram]](diagrams/3/5519e2f091d80d7619e950511c4342cf.png)
White just doesn't have the liberties needed anymore. (See next variant for 
at 
.) This is 21 points for Black in gote.[1] This seems big enough for either player not wanting to wait . . . but should wait, it's a big ko threat.
![[Diagram]](diagrams/18/83434667ea37405265cf2d07afe1bf4e.png)
Confused: Here is the variant, White's still dead. White can't play at a because of a shortage of liberties.
![[Diagram]](diagrams/14/43e8bb0a508363368929ea7d687b415a.png)
Robert Pauli: This nice seki results should Black start with hane, blindly following the proverb "the opponent's vital point is my vital point".
It features
- an one-sided dame for Black (at )
- a sending-two-returning-one option for Black (to the right of
)
- a sacrifice option for Black (filling both 2-1's and restoring seki via 2-2)
- Back to Beginner Exercises
- Go to Beginner Exercise 46
[1] The play is worth 15 points by miai counting.
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