Tall door group

    Keywords: Life & Death

Table of contents

Tall Door Group

[Diagram]

Tall Door Group

Compare with the door group, the tall door group is one line taller. It is alive.

[Diagram]

The strongest attack results in seki.

[Diagram]

W9 at B2

Under some circumstances, this could be the best for white. White seals the top side, black has only 2 points, and white get 1 point from capturing B2.


Weak Tall Door Group

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Weak Tall Door Group

Weak tall door group is unsettled.

[Diagram]

Because of the weakness, the seki for "tall door group" is no longer there.


Semi-Tall Door Group

[Diagram]

Semi-Tall Door Group

Only half of the group is taller. This shape is unsettled.

[Diagram]

W1 hane on the taller side kills. After W5, black is unable to capture W3 due to shortage of liberties.

Note that B4/W5 before B2/W3 is the same.

[Diagram]

Another variation


See also:


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