:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222mj)
Black connects his six endangered stones at the top.


Ko: ; ; ; ; ;

:
White occupies Black's last but one outside liberty.

:
Black captures in the corner, starting the ko fight.

:
White captures the hanezeki's tail.

Please note that Black's atari at is valid ko threat here, as capturing the nakade with will be sente for White.

:
White recaptures the ko.

:
Black lives in the lower right, so erasing several potential White ko threats that would arise during the dissolving of the hanezeki.

:
White makes the ko in the upper left corner a direct one.

:
White has one unerasable ko threat left in the hanezeki.

:
Black kills White's group in the lower right corner.

If he captured in the upper left with , instead, White would live in the lower right with .
The formation above would become seki again.

:
White recaptures the ko for the last time.
Black does not have any valid ko threat left, so White will capture Black's upper left corner with with her next move.

White will win the game by a large margin.

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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