:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

(.1) (.1) (.1) (.2)

: ( 222cg)
Black captures White's single stone in the right centre.

:
White cannot win the Central Semeai on its own. Therefore, she arms the ko fight in the upper left corner by pushing at the upper edge.

:
White occupies an outside liberty of Black's cut-off stones. This makes sure that the best that Black can achieve in the upper right corner, is a seki.

:
White recaptures.

:
Black gives atari at the upper edge.

If he played the bump at the top, instead, White would connect at at the left edge, forcing Black to cut through with at the top.
White would win the game by about 25 points.

:
White occupies the miai point at the top, in sente.

:
Thereafter, she connects at the left edge.


Ko: ; ; ; ; ; ; ;

:
Black starts the ko fight in the upper left corner.


Ko: ;

...


Ko: ;

:
Black's large group at the right has only six liberties left, so Black is forced to connect the hanezeki's tail.

:
Black does not have any viable ko threat left, so he connects the ko in the upper left corner.

:
White starts the semeai with Black's bottom group.

:
After this move, Black's connected group at the bottom has only two liberties () left, while White's centre group still has three liberties (). White will win this semeai.

White will win the game by a very large margin.

Copyright © 2021 Thomas Redecker.

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