:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2) (.2) (.1)

(.1) (.1) (.1) (.1)

: ( 222co)
Black throws-in in the right centre at the latest moment possible.

:
White has to capture.

:
Thereafter, Black captures White's single stone in the upper right.

:
KataGo likes to continue with White's push in the upper left corner.

:
White recaptures.

:
White occupies an inside liberty of Black's cut-off stones.

:
Black starts the ko fight.


Ko: ; ;

:
It follows a series of exchanges that could also be played as mutual ko threats.

:
White is behind in ko threats, and so captures the hanezeki's tail.

:
Black recaptures.

:
Black pushes into White's upper right corner.

:
White ends the ko fight in the upper left corner by giving atari at Black's cut-off stones.

:
Black's attachment is tesuji.

:
Black connects along the right edge.

:
The endgame continues in the lower left corner.

Eventually, Black will connect at , and White will do so at .

Capture Variation:

Compared to the super²ordinate variation ...

  • White captures eight Black stones in the upper right corner, so gaining 16 points.
  • White did not capture one Black stone at the top, so losing one point.
  • Black's cumulated gain in the nakade area is six points.
  • White destroyed one point of Black's territory in the lower left corner.
  • Black's cumulated gain in the upper right corner is five points.
  • Black's cumulated gain in the centre is six points.

In total, Black gained one point.

White + 7 => White + 6

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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