BQM 187

Path: BigQuestionMark   · Prev: BQM186   · Next: BQM188
  Difficulty: Advanced   Keywords: Tactics, Question

Chris Hayashida: I was playing a nine-stone teaching game, and I ended up with this situation in the lower right. I was already way ahead. I was trying to teach how to kill an invasion by taking away the eyespace from the outside, and I realized that the corner invasion got much more complicated that I had previously thought. It looks like it could live, and I wasn't ready to go through the variations with a beginner and confuse the issue.

[Diagram]

Can this live?


[Diagram]

I think, it can do...

In my reading ... White can live by playing these moves. But I'm not sure if these moves are best way to live.


[Diagram]

Can this live?

unkx80: Can this live? bud1027: No.


[Diagram]

How about this?

Bill: How about this?

I have played around with it a little bit, and think that maybe White can get a ko. Difficult, though. ;-)

[Diagram]

Ko (i)



[Diagram]

Ko (ii)

For instance. :-)

[Diagram]

Connect outside

dnerra This seems better than ko:



[Diagram]

Oiotoshi

Bill: Oiotoshi, I think.

Chris Hayashida: I'm glad to see that this position merited further study. It was deeper than I could read offhand, and definitely deeper than I wanted to go through with a beginner (since it would take away from the "thesis" of the lesson, to connect together.) Thank you all for your comments.

[Diagram]

Black blocks

Bill: But wait! There's more! If B6, now W7.

[Diagram]

Ko #2

B1 is one approach. W2 offers a ko.

The ko can also arise by B3 - W2, B1 - W4.

[Diagram]

Ko declined

If B1 declines the ko, W2 saves the day, making two eyes.

[Diagram]

No kill

W10 at W5.

B1 holds White to one eye here. W2 makes a snapback. Then Black may try B3 - B9 to make the second eye false, but W10 prevails.

[Diagram]

Key point?

From the above, B1 looks like a key point. But after B3, W4 threatens to connect underneath. If B5 prevents that, W6 offers the ko.

[Diagram]

Key point? (cont)

W10 at W5.

If B1 declines the ko, W2 lives. If B7 at B8, White captures and still lives.



Path: BigQuestionMark   · Prev: BQM186   · Next: BQM188
This is a copy of the living page "BQM 187" at Sensei's Library.
(OC) 2005 the Authors, published under the OpenContent License V1.0.
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