Kyu Exercise 1 / Attempts

Looks alive to me... if White has sente, should it go like this? Where fills at black+circle again?

ChaoSpectre: Fills at black+circle ? Do you mean fills the ko? What about 9 here? Also, is it possible to extend from while retaining the corner (S)? I realize that it is not important to the status of the group at this point but...

If it's Black's turn to play, it turns out like this? With White alive once again?

Dieter

SnotNose: Looks like ko.

(Moved from /Solution).

Dead, I think - Floris

Dieter: This doesn't prove it is dead, but that it is killable. Is it dead already or unsettled? If so, White can live in ko or live?

unkx80: To put it more directly, when a problem asks for the status of a group, it is effectively asking two questions. 1) Black first to play, what is the best result? 2) White first to play, what is the best result?

SnotNose: Alive. Classic L+1 group living shape.

SnotNose: Dead. Classic L+1 group kill.

SnotNose: doesn't work. Here is one way for Black to kill. There are others.

Rafael: SnotNose says kills. So this is another problem. After the solution to the original problem is settled, this one could be moved to its own page.

unkx80: I think kills "unconditionally". What I am not too sure is, what if is played at . I thought it should be a ko.

SnotNose: a and b are miai for the kill.

SnotNose: I think unkx80 is right (that perhaps yields a ko). If Black insists on going for a kill, he will have to ignore I think. (The black+circle stones steal the eye at the edge after a throw-in so Black need not respond to right away). Thus, Black can try for the kill with . Continuation in next diagram.

SnotNose: Unfortuneately, Black cannot chase White all the way to the edge because he is short of liberties. I think the best Black can do is jump out with and fight on the outside. Black is full of cutting points so I think White can break out.

I believe this is the only chance for a kill. Since it fails, White should be at worst alive in ko. Here's one way for ko.

SnotNose: is a good move and almost makes a living shape. through are all forced. Any deviation from these lets White live (I think) unconditionally.

SnotNose: Another ko.

SnotNose: Black a, white squeeze at b. No ko this way.

togo: When getting this far, kills ...

togo: ... but White can force a ko on the right side with ( W14 on white+circle ).

(more attempts copied from the /solution page)

GustavoBR: i think this is what should happen... please, post your comments =D

El Draco: I think this belongs in the attempts page. The problem asks for the status with both players to move. Also see the page history for what has already been posted on this page (by Floris) and is essentially the same as you entered.

I'm new to this, but I think white is dead. please post your comments.

Schinkenjoe If the ladder doesn´t work black can - depending on the situation to the left - just secure at b or - if there is much white to the left - work up to the ko.

But only if Black plays weak.

There is a defence P.S: Sorry I overlooked the attempts page. So we got it twice

Path: Kyu Exercises =>

Kyu Exercise 1 / Attempts last edited by togo on November 19, 2012 - 02:35

RecentChanges · StartingPoints · About

Edit page ·Search · Related · Page info · Latest diff