Kanazawa Problem 7 / Solution

Sub-page of KanazawaProblem7
[Diagram]

A tesuji

Black has one eye at the circled point. B1 makes miai of the capture at a and the connection underneath at b, capturing two stones.

[Diagram]

Variation 1

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

[Diagram]

Continuation

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

[Diagram]

Variation 2

Black makes a second eye with B3, and two points there. White can play neither at a nor at b because of shortage of liberties.



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]

At 'a' is wrong

The vulgar atari of B1 is a painful mistake. It's a so-called anti-suji, missing completely the proper line of play.

White answers at W2 and the connection underneath at a doesn't work any more. White must not play anti-suji with W2 at b, for Black will descend to c and make the connection work again.


[Diagram]

Losing points

Forcing White's answer with B1 loses points. There is no need for Black to lose the stone at B1.

[Diagram]

Losing more than points ?

Can't White answer this way?


Go to Problem 8
Back to KanazawaTesujiSeries.


This is a copy of the living page "Kanazawa Problem 7 / Solution" at Sensei's Library.
(OC) 2005 the Authors, published under the OpenContent License V1.0.
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