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KanazawaProblemSeven

 

Kanazawa Solution Seven
Path: KanazawaSolutions   · Prev: KanazawaSolutionSix   · Next: KanazawaSolutionEight
    Keywords: Problem

[Diagram]
Diag.: A tesuji

Black has one eye at the circled point. Black 1 makes miai of the capture at a and the connection underneath at b, capturing two stones.


[Diagram]
Diag.: Variation 1

After the connection underneath, White can't give atari at a.


[Diagram]
Diag.: Continuation

Black makes four points capturing two stones, while White makes seven points (circled + captured).


[Diagram]
Diag.: Variation 2

Black makes a second eye with 3 and 2 points there. White can play neither at a nor at b because of damezumari. White makes four points capturing the stones, and one point at the circled points (Black has to throw in a stone to prevent an eye).
The difference between the two variations is (5 - 2) - (7 - 4) = 0. So White can decide her answer according to the global position.



[Diagram]
Diag.: At 'a' is wrong

The vulgar atari of Black 1 is a painful mistake. It's a so-called anti-suji, missing completely the proper line of play.

White answers at 2 and the connection underneath at a doesn't work any more. White must not play anti-suji with 2 at b, for Black will descend to c and make the connection work again.



[Diagram]
Diag.: Losing points

Forcing White's answer with 1 loses points. There is no need for Black to lose the stone at 1.



Go to Problem 8
Back to KanazawaTesujiSeries.



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