Beginners Endgame Exercise 1 / Attempts

sente attempt  

unkx80: Sente but loses points. No need to think too hard...

sente attempt  

bobulatorm Oh! Of course! Is this right?

sente attempt  

argh i've just seen another route although i think B should play 2 at 5. will try again later. sorry for my lack of reading skills!

yes  

Dieter: yes, this should be the solution

Bill: Yes, is the right reply to . :-)

later  

JoelR: Later - and - are White's sente. This looks 3 points worse for Black than Bill's "Black to Play" diagram.

 

ichundso?: i think this is very very slightly better, because "a" is a ko threat that destroyes a black ko threat at "b"

and another thing  

JoelR: Meekly capturing like this is not as good for Black. The points a and b are not occupied as in the correct solution, which leaves White the chance to play a in gote for another point.

If black goes first  

Dieter: If Black goes first, he wins two points and leaves a half-point ko. The local tally is 1, so the miai value is 2 1/2 ??

Bill: It has been a while, so I'll reply.

Black to play  

is orthodox play. Later, - is sente.

The hane, , is correct only in very special circumstances, where Black is komaster and the ambient temperature is very low. To win the ko Black would need some very large ko threats, but then Black could pick up an extra point.

(Anonymous): Umm? How does Black get an extra point? If black wins the ko and connects, both have captured one stone and lost one point relative to the orthodox diagram, so it's the same result? Seems to me like Black has nothing to gain in the ko and one point to lose.

Bill: Good point! Yes, I goofed. The ko gains only under area scoring when Black can win the ko after the dame have been exhausted. Since this is White's sente, and White has a huge threat, that's virtually impossible.

Black to play  

shinkenjoe: Not sure bout this. White gains 1 point of territory in sente, the black gote play at 1 gets black one point in gote So the deiri value was 2, its white´s sente so the miai value is 2.

2 ignoring the threat  

The threat behind the black gote at 1 , if white didn´t answer with 2, humm it gets hard now.

Implying Black plays 5 cause he he can be sure that white answers with 6. it takes 4 points of white territory fot black in sente, worth 4 point leaving another sente-gote in favor of white exactly like the first sente An white answer there would also be sente. Sente- sente situations can´t be measuered in miai value, i thought. Im confused

Bill: JoelR got the value right, above. is the 3 point reverse sente. is a 2 point reverse sente. should be at . No double sente here.