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KanazawaProblem24
TwoByThreeBoxDisc...

 

Kanazawa Solution 24
Path: KanazawaSolutions   · Prev: KanazawaSolution23   · Next: KanazawaSolution25
    Keywords: Problem

[Diagram]
The 1-2 point

Strange things happen at the 1-2 point!


[Diagram]
Main line

After Black captures two stones at 6, White throws in with 7 at 5 (next diagram: 1 = 7 here)


[Diagram]
Continuation

If Black connects with 2, White 3 creates a snapback. If Black 2 at a, White 3 again does the trick.



[Diagram]
Variation 1

[Diagram]
Variation 1A

  • If Black 6 at a, White 7 at 1 captures and makes a living shape.
  • If Black 6 at 1, White 7 at b makes a second eye.
  • If Black 6 at b, White 7 at a makes life.

[Diagram]
Variation 1B


[Diagram]
Wrong 1


[Diagram]
Wrong 2

KarlKnechtel: This diagram seems to suggest that a and b are miai, but I'm not convinced:


[Diagram]
Wrong 2

Isn't this seki? If Black tries to play at either a or b the resulting capture leaves a living BentFourInTheCorner, since in each case there are miai to cut the space into two parts.

unkx80: This is not seki, this is a dead group. Please refer to Two By Three Box. Also, what you called the Bent Four In The Corner should be simply termed as Bent Four.

KarlKnechtel: (after referring as requested) Ah. I neglected that Black's play at a would capture the group with the outside liberties filled :) Forest and trees are miai in my vision it seems ;)

Also, could someone refute this White 1 below (which was my instinctive, 5-seconds-of-thought answer):


[Diagram]
Wrong? (6 at 1; but is this the best line after 1?)

unkx80: Of course White 1 is wrong. Otherwise this diagram is perfect.

Rauli: I beg to differ. 6 should be at 8. Style ;-)
unkx80: This I know. Just that I do not want to be that nitpicking. =)

KarlKnechtel: I can get *something* right at least then ;)

And just to follow up, White 3 at 4 leaves a dead shape in the large corner eye, and Black plays 4 at a to prevent a second eye. Right?

unkx80: Yes.



[Diagram]
Wrong 3


Problem 25
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(OC) 2003 the Authors, published under the OpenContent License V1.0.