:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222dp)
White plays hane at the upper edge, setting the scene for the ko fight in the upper left corner.

:
Black gives atari.

:
The ko fight starts.


Ko: ;

:
Please understand the exchange of for as replacement for the kikashi of , in the hanezeki, which we had played too early above.


Ko:

:
Please understand the exchange of for as replacement for the kikashi of , in the hanezeki, which we had played too early above.

:
Black does not have a valid ko theat left, so he takes a liberty of White's group at the left.

:
White captures the hanezeki's tail in return.

:
Black recaptures, as usual.

:
White plays the oki in the lower right.

:
White occupies a liberty of Black's cut-off stones, so turning the approach-move ko into a direct one.


Ko:

:
Black does not have any ko threat left.

:
White gives atari at Black's cut-off stones, so ending the ko fight in the upper left corner.

:
Black takes some profit in the lower left.

:
The endgame continues for a few moves.

Capture Variation:

Compared to the superordinate variation ...

  • White captured eight Black stone in the upper left corner, so gaining 16 points.
  • Black's cumulated gain at the top is one point.
  • White did not get one point of territory in the right centre.
  • Black got an additional three points of territory in the lower left corner.

In total, White gained eleven points.

White + 5 => White + 16

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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