RTG Problem 28 / Attempts

Direct ko  

Direct ko, white must search for first ko threat,

Black to play.  

Black has 1 internal ko threat.

If ..

Possibility  

Rich: If you start with , why not like this?

Semeai  

JoelR: Now each has 3 liberties (including ), plus the shared liberty, and it's White's move.

Semeai  

TDerz: I missed a lot !

Possible danger?  

Rich: Although it seems that the black corner is now dead. I've probably missed something...

 

Tderz: and are miai. Black is dead

Refute  

Dieter
Rich: Black still has one eye, no?

And now?  

--Bill

Black to play.  

Tderz: All of this excellent stuff written above proofs:

• I was indeed careless again, and
• Black should better take care of his group:

Liberties  

Dieter: Black cannot save his cutting stones but lures out his two stones.

More  

cannot resist due to lack of liberties

Or ...  

Or can White do even better?

DJ: This last diagram seems not so good for White:

Black lives  

Now either Black lives or captures also the two stones in the corner. A similar sequence happens if is at a ( at ):

Alleged solution 2 failure  

But now I think kills.

Which means, I need to give Black more liberties as follows. Sorry for the blunder.

Black to play.  

Bill: That's OK, unkx80. Even the gods falter. :-)