:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (Ib)

KataGo's 2021 Solution

VAR (.3) (.3)

: ( 58ce)
White pushes into Black's lower left corner first.

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

:
White further reduces Black's territory in the lower left corner.

:
White connects her single stone in the right centre.

:
It is best for Black now to defend in the lower left corner.

:
White plays KataGo's bad-shape move in the left centre.

:
Black responds with the solid connection.

:
The Main Semeai continues.

Black plays 2/2 reductions.

Capture Variation:

Compared to the superordinate variation, ...

  • The net effect of the different play in the lower left corner is zero.
  • White destroyed one point of Black's territory in the left centre.
  • Black captured White's two stones in the lower left, so gaining four points.
  • Black did not capture White's single stone in the right centre, so losing two points.
  • White got an additional point of territory in the centre.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation, ...

  • The net effect of the different play in the lower left corner is zero.
  • Black captured one White stone more at the left, so gaining one point.
  • White captured one Black stone less in the right centre, so losing one point.

In total, White lost two points.

White + 2 => Jigo

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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