:: Igo Hatsuyôron 120 (2020)

Variations of Our Solution (IIIa)

No Early Kikashi

VAR (.1) (.1)

: ( 648ab)
Black plays his kikashi in the hanezeki too early.

: (131 648fb)
White erases Black's potential eye in the left centre.

She must not mistakenly throw-in with , instead. She will lose one point overall, if she does not want to return to the main line that is also worse for her (even only in the Semeai Variation).

: (132 648fc)
Black is forced to connect.

Capturing at , instead, will end in a disaster for him.

:
White's move is played outside the Main Semeai area, but does not lose a tempo, because it generates an approach-move liberty at for her left-hand group.

:
Black must secure his second eye at the bottom.

:
Now, White answers Black's initially played kikashi.

:
It is best for Black to capture White's single stone at the upper edge.

:
The further endgame follows the usual course.

White's move in the centre is bigger than defending the top with blocking at .

:
White is better in the Capture Variation than in the Semeai Variation; therefore, she cannot afford to choose Dany's Sacrifice.

Black plays 2/2 reductions.

Black will have to capture at before the end of the game.

Capture Variation:

Compared to the superordinate variation ...

  • Black did not get an eye in the left centre, so losing one point.
  • White gained two points of territory in the left centre.
  • Black destroyed one point of White territory at the top.
  • Black connected his single stone in the lower right, so gaining two points.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation ...

  • Black did not get an eye in the left centre, so losing one point.
  • White gained two points of territory in the left centre.
  • Black destroyed one point of White territory at the top.
  • White captured an additional Black stone in the lower right, so gaining two points.

In total, Black lost four points.

Black + 4 => Jigo

Copyright © 2020 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

L e g a l   n o t i c e