:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A)

: ( 222aa)
Black plays the guzumi.

:
White answers immediately.

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

There is nothing else he could do, as he is already par with the Punishment Semeai Liberty Level.

:
White has to start the endgame in the lower left corner "early".

:
Please note that White's atari loses one tempo in the Main Semeai, in principle.

:
Black takes the opportunity to capture White's two stones in the lower left.

Alternatively, he might consider capturing White's single stone in the upper right with a move at , achieving the same final scores as herein.

:
White keeps the matter simple by connecting in the right centre.

:
Both Main Variations will end with the same score, so Black has to play his kikashi in the hanezeki "early".

:
Black defends his territory in the left centre.

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White's push at the left edge destroys two points of Black's territory, but does not lose any Main Semeai Liberty.

:
Black must defend against White's throw-in at .

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White's hane at the upper edge takes profit outside the Main Semeai area. This will benefit White in the Semeai Variation.

Black plays 1/2 reductions.

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

Capture Variation:

Compared to the super²ordinate variation ...

  • White's cumulated gain in the upper left is seven points.
  • White's cumulated gain in the lower left is two points.
  • Black's cumulated gain in the upper right is eight points.

In total, Black lost one point.

White + 2 => White + 3

Semeai Variation:

Compared to the super²ordinate variation ...

  • White's cumulated gain in the upper left is seven points.
  • White's cumulated gain in the lower left is two points.
  • In the upper right corner, White lost four points of territory, but captured an additional three Black stones, for a cumulated gain of one point.
  • Black captured an additional two White stones at the left, so gaining four points.

In total, Black lost six points.

Black + 3 => White + 3

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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