:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2) (.2) (.1)

: ( 222oc)
White answers Michael Redmond's kikashi with the atari.

This move loses one tempo in the Main Semeai, so Black is back to par with the Punishment Semeai Liberty Level again.

:
Black gives atari at White's two stones in the lower right, so continuing with the Main Semeai.

:
White does not connect her stones, in order to keep Black below the Punishment Semeai Liberty Level.

:
Sooner or later, Black will descend to the left edge.

:
This enables White to connect her five stones in sente, threatening to throw-in at .

:
Black has to reinforce his corner.

:
White starts the endgame at the left side "early".

She might even wait until after her decision point.

Black must not play any reduction.

After her decision point, White will hane at .
However, she will have been unable to close all the borders of her territory in the upper right. Therefore, Black will be able to push once, e.g. at , enforcing White's reply at .
Before the end of the game, Black must connect at .

Capture Variation:

Compared to the super²ordinate variation ...

  • Black got an additional two points of territory in the upper left corner.
  • White got an additional five points of territory in the upper right corner.
  • White captured two Black stones in the upper right, so gaining four points.
  • Black destroyed one point of White's territory at the top.

In total, White gained six points.

White + 2 => White + 8

Semeai Variation:

Compared to the super²ordinate variation ...

  • Black got an additional two points of territory in the upper left corner.
  • White got an additional four points of territory in the upper right corner.
  • Black captured one White stone less at the left edge, so losing two points.
  • White captured two Black stone less in the upper right, so losing four points.

In total, gains and losses compensate for each other.

Jigo => Jigo

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