I know I'm not 三段, but I just had to try this one out
My answer: 1@AB, 2@AC, 3@DC, 4@CC, 5@DB, 6@DA, 7@EC
I chose Black 1 @ AB since Black threatens to connect out. White plays @ AC to prevent it. Black 3 puts the 4 Whites into atari. White 4 connects. Black 5 extends to the 2nd line. White 6 @ EC is not an option due to shortage of liberties, so White plays @ DA to atari the 2 Blacks. Black 7 at EC puts 4 Whites into atari.
White 4 @ EC will result in two White groups in atari once Black plays at DC, so White plays at DC. Double atari after Black 5. White captures @ DA. Atari on 2 White stones with Black 7. White 8 is at CC to connect. After Black 9 White group cannot atari 3 Black stones in the corner due to shortage of liberties.
I chose Black 1 @ AB since Black threatens to connect out. White plays @ AC to prevent it. Black 3 puts the 4 Whites into atari. White 4 connects. Black 5 extends to the 2nd line. White 6 @ EC is not an option due to shortage of liberties, so White plays @ DA to atari the 2 Blacks. Black 7 at EC puts 4 Whites into atari.
White 4 @ EC will result in two White groups in atari once Black plays at DC, so White plays at DC. Double atari after Black 5. White captures @ DA. Atari on 2 White stones with Black 7. White 8 is at CC to connect. After Black 9 White group cannot atari 3 Black stones in the corner due to shortage of liberties.
I tried to translate your variations to diagrams, is this correct?
If a then b and it's a golden chicken standing on one leg.
Re: My attempt at a 3-dan problem (black to play)
Posted: Sat Jul 06, 2013 4:39 pm
by tekesta
@Sverre: Yes, that is the problem depicted in the photo. The diagrams correctly depict the sequences I mentioned. Thank you for producing the diagrams.
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I had a feeling that the first answer would not work since White can live by sacrificing the top 4 stones. The second answer would be closer to the correct solution, although seki is probably not the answer that the author of the problem wants. Shaddy's answer with throw-in as final move never occurred to me. Now I see why it's rated 3-dan.
In any case it's fun to play around with these tsumego Thanks to all who posted here for your answers.
Re: My attempt at a 3-dan problem (black to play)
Posted: Sat Jul 06, 2013 6:35 pm
by Shaddy
Damn, I got the order wrong. I'm really rusty, it seems..
? And your second variation is seki.
Thanks to all who posted here for your answers.