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KanazawaProblemTwo

 

Kanazawa Solution Two
Path: KanazawaSolutions   · Prev: KanazawaSolutionOne   · Next: KanazawaSolutionThree
  Difficulty: Advanced   Keywords: Life & Death, Problem

Main line: Hashimoto Utaro
Variations: Dieter

[Diagram]
Main line

The points a and b are miai for life.

Related proverb: strange things happen at the one-two point - in this case you need to know which of the two 1-2 points, of course.


[Diagram]
2 and 3 are miai (i)

Black has two sure eyes at a and b.


[Diagram]
2 and 3 miai (ii)

If White next blocks at a, Black makes a big eye at b. And if White draws out at b, Black enlarges the eye with a.



NB: if White has a stone on one of the circled points, her move at b suddenly works and Black is dead, although a lot of aji remains, because he can break out into the centre (in this position).

[Diagram]
Question on previous diagram

Grauniad: After b and a above, White can play W3 to W9 or some similar sequence. In this case, I don't see how Black can make a second eye.



Jasonred : Grauniad, after some reflection, I think my move W6 in the following diagram is not even necessary... Just keep enlarging the eyespace! B6 in your sequence seems wrong to me - I think B6 at W7 in your diagram? So... like this?:

[Diagram]
Attempt 2 (strangely placed before 1...)

Though I think that White should really play W2 at B3...



[Diagram]
Answer?

Jasonred : I think that this is how it goes? I'm not sure though. I do know that W7 seems to be a good idea, or Black's going to escape and destroy White's shape, and cause general chaos.



I played 8 hoping to threaten WC, hoping that White must reply at x or y... I guess if White plays W9 at this point, I would either play at a or b ... probably a... in this battle If you keep stretching to the right, so will Black, right?


[Diagram]
Grauniad answers his own question

Grauniad: Jasonred, extending your diagram above reveals the solution in which Black escapes to the centre.

All this must have been obvious to stronger players than us.

Some deshi now needs to WikiMasterEdit this discussion (possibly by removing it).

Jasonred : Sadly my friend, it was obvious to a weak player like me... evidently, I can't explain my diagrams properly or something.. anyhow, there's a lot of things Black can do after extending that far to the right; which is why White more or less has to hane early on, letting Black solidify that eye...



[Diagram]
Wrong (i)

B1 is wrong. After W2, B3 and B5 seem to make the most of it, but when White cuts at W6 it's all over.



[Diagram]
Wrong (ii)

If Black plays at the other 1-2 point, it is also wrong. B5 and W6 are miai for the kill. After W6, Black can play neither a nor b because of shortage of liberties.



[Diagram]
Wrong (iii)

B1 here is also wrong. White can even respond at ease to the hanes at B3 and B5, because whatever Black does, the points a and b remain miai for the kill.



[Diagram]
Wrong (iv)

Finally, what about making the corner eyespace as big as possible, with B1 here? White plays hane at W2, threatening to capture three stones. Black has to make a solid connection. This is as in Kanazawa Problem One, but with a white stone at W2, and Black is dead.



[Diagram]
What about this? (iv)

White at a kills the black group with two more white stones.



[Diagram]
Wrong (iv) suggestion.

unkx80: It might be better to have W2 block on the outside.



Back to Kanazawa Tesuji Series
Go to Problem 3



Path: KanazawaSolutions   · Prev: KanazawaSolutionOne   · Next: KanazawaSolutionThree
This is a copy of the living page "Kanazawa Solution Two" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.