:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2)

: ( 222ma)
Black captures in the upper left corner.

:
White gives atari.

: (112 222ms)
This connection is Black's only choice if he wants to save his upper left corner.

Giving counter-atari with ends futile.

:
White connects, starting a semeai with Black's partial group below.

:
After this dencent to the left edge, Black will win the fight in the corner.

:
White's oki will become decisive. White occupies Black's outside liberties, and she will utilise Black's shortage of liberties.

:
Black must occupy liberties of White's corner stones.

:
White answers Black's guzumi at the right.

:
Black captures White's three stones in the corner.

:
But White captures Black's single stone there, achieving independent live for her group at the left.

:
Black tries to start a semeai with White's centre group, but he will fail.

:
White threatens to create an eye at the upper edge, or to connect along it to the right.

:
It does not make sense to start a ko fight here.
Sooner or later, White will play at , turning the position into me-ari-me-nashi. And Black does not have a sufficient amount of outside liberties to win the semeai even without any eye.

White will win the game by a large margin.

Copyright © 2021 Thomas Redecker.

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