:: Igo Hatsuyôron 120 (2020)

Variations of Our Solution (IIIa)

No Early Kikashi

VAR (.2)

: ( 648aa)
Black connects in the lower left corner.

: ( 132 648os)
White plays the central attachment in the left centre.


Heading for Dany's ko by playing Dany's atekomi , instead, would increase White's score in the Semeai Variation.


:
Please note that White's move is played outside the Main Semeai area, and so would lose one tempo, in principle.
Here, however, this move creates an approach-move liberty () for her left-hand group, so the cumulated effect on the number of Main Semeai Liberties is zero.

:
Black starts playing his remaining kikashi.

:
White connects, refuting Dany's Sacrifice.

:
Black captures White's single stone at the upper edge.

Alternatively, he could destroy White's potential territory in the centre with .

:
White takes two points of territory in the centre.

:
Black reduces White's territory at the top by another point.

Black plays 2/2 reductions.

Capture Variation:

Compared to the superordinate variation ...

  • White lost one point of territory at the upper edge.
  • Black did not get any territory in the left centre, so losing one point.
  • White got an additional two points of territory there.
  • White did not capture Black's stone in the lower right, so losing two points.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation ...

  • White lost one point of territory at the upper edge.
  • Black did not get any territory in the left centre, so losing one point.
  • White got an additional two points of territory there.
  • White captured Black's stone in the lower right, so gaining two points.

In total, Black lost four points.

Black + 4 => Jigo

Copyright © 2020 Thomas Redecker.

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