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InvasionItinerary

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4464 enclosure 3-3 invasion
Path: InvasionItinerary   · Prev: 4463Enclosure33Invasion   · Next: Butterfly
  Difficulty: Advanced   Keywords: MiddleGame, Joseki, Question

[Diagram]
Joseki

Jesusin: This is a diagram from the book "Get strong at invading". It is a middle game joseki. There are other possibilities for B4.

The text (answer to problem 107) says White is alive after the sequence.

But I do not seem to find this group alive. Here are my variations:


[Diagram]
Continuation 1, is White alive?

Up to W9 White is dead. If White a next, then Black b.

What am I missing?



Charles Matthews Try W6 at B7, as in Continuation 2, but after playing White b, Black a. Black is short of liberties. If Black is very strong locally it may be possible to kill White after White comes out at W8. For example, the game between Fujisawa Hideyuki and Go Seigen, 1973-11-18.


[Diagram]
Continuation 2, is White alive?

Up to B9 White is dead. If White a next, then Black b.

What am I missing?

Andrew Walkingshaw: What if, instead of a...


[Diagram]
Continuation 2, White makes two eyes

White plays at W1 here, living locally through W5. If, instead, Black tries the play at B2 below:



[Diagram]
Continuation 2c, connect and die (6 at 3)

White can play as shown here, catching the outside stones and making an eye on the edge.



Jesusin: Thank you very much, Charles and Andrew.


[Diagram]
Continuation 2d, White dies

Olo: After B7 white dies. White can live only if have not played W2 before.



For the sake of completeness I will show the other variation for B4 in the first diagram:

[Diagram]
Joseki II, part 1

[Diagram]
Joseki II, part 2


Path: InvasionItinerary   · Prev: 4463Enclosure33Invasion   · Next: Butterfly
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