:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2)

: ( 222nb)
Black captures White's two stones in the lower left.

:
White captures Black's single stone at the lower edge in sente.

: (123 222ni)
White plays the large hane at the upper edge, pre-empting a Black move at the same point.
This move will benefit her in the Semeai Variation.

Connecting her single stone in the upper right, instead, so taking profit in the Main Semeai area, will be a slight mistake.

:
Black is able to give atari at White's five stones in the upper left.

:
Black captures White's single stone in the upper right.

Simply continuing with occupying White's liberties at the left would be one point worse overall.


: (135 222nk)
White secures two eyes for her centre group.

Alternatively, she might consider playing the wedge at , instead.
With everything else on the board settled, the final scores of the game will remain unaffected.


:
White's score in the Semeai Variation will be better than that of the Capture Variation, so Black has to insert his kikashi in the hanezeki early.

Black plays 0/1 reduction.

Before the end of the game, Black will have to connect at .

Capture Variation:

Compared to the superordinate variation ...

  • White captured Black's stone at the lower edge, so gaining two points.
  • Black's cumulated gain in the upper right is three points.

In total, Black gained one point.

White + 2 => White + 1

Semeai Variation:

Compared to the superordinate variation ...

  • White captured Black's stone at the lower edge, so gaining two points.
  • White captured an additional Black stone in the upper right, so gaining two points.
  • White lost one point of territory in the upper right corner.

In total, Black lost three points.

Jigo => White + 3

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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