:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2)

: ( 222nh)
White connects her single stone in the right centre.

:
Black's atari at White's five stones is sente.

: (A 222nj)
Black occupies the large endgame point at the upper edge.

He would allow White to also win the Semeai Variation, if he defended his territory in the left centre with , instead.

:
White plays the wedge in the left centre.

:
This is KataGo's bad-shape-move.

:
Black connects immediately, as there is nothing else left that he could do.

Black must not play any reduction.

After her decision point, White will block at at the upper edge.

Capture Variation:

Compared to the superordinate variation ...

  • Black got an additional two points of territory in the upper left corner.
  • White's cumulated gain in the left centre is one point.
  • Black did not destroy one point of White's territory in the centre.
  • Black did not capture White's stone in the upper right, so losing two points.

In total, Black lost two points.

White + 1 => White + 3

Semeai Variation:

Compared to the superordinate variation ...

  • Black got an additional two points of territory in the upper left corner.
  • White's cumulated gain in the left centre is one point.
  • White got an additional point of territory in the upper right corner.
  • White captured one Black stone less at the right, so losing two points.
  • Black captured one White stone more at the left, so gaining two points.

In total, Black gained four points.

White + 3 => Black + 1

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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