:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2) (.2)

: ( 222bd)
Black captures White's two stones in the lower left.

:
White continues with the endgame in the lower left corner.

:
It is best for Black to play this defensive move at the top.

:
White plays the wedge in the left centre.

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This is KataGo's bad-shape move in the left centre.

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In principle, White's previous move lost one tempo in the Main Semeai, so Black is able to push at the top.

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Thereafter, Black plays KataGo's solid connection.

Black must not play any reduction.

After her decision point White will connect her single stone at the upper edge with .

Capture Variation:

Compared to the superordinate variation ...

  • White's cumulated gain at the upper edge is three points.
  • White destroyed two points of Black's territory in the left centre.
  • Black captured one White stone there, so gaining one point.
  • Black captured White's two stones in the lower left, so gaining four points.

In total, gains and losses compensate for each other.

White + 4 => White + 4

Semeai Variation:

Compared to the superordinate variation ...

  • White's cumulated gain at the upper edge is three points.
  • White destroyed two points of Black's territory in the left centre.
  • Black captured one White stone there, so gaining one point.
  • Black captured one White stone less in the lower left, one one White stone more in the left centre, so the net effect is zero.

In total, Black lost four points.

Black + 5 => Black + 1

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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