:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222fn)
Black gives atari at White's two stones at the top.

This move is a grave mistake, when the lower border of Black's upper left corner is still unsettled.

:
Quite surprisingly, White extends into the corner, instead of capturing with at the upper edge.

:
Black must capture White's two stones - sooner or later.

:
White further attacks in the corner.

:
White gives atari at the left edge.

:
Black is forced to connect, as he will be unable to win any ko fight, due to White's ko threats in the nakade and the hanezeki.

:
Finally, White cuts Black's forces apart.

: (118 222fp)
Black pushes at the second line.

Jumping to , instead, will not lead to success either.

:
White's hane makes it difficult for Black to approach her stones from the corner.

:
Black pushes at the top.

As a matter of course, he could kill White's corner stones with the sequence , , .
However, he would be forced to invest another move in the corner () to really take White's stones off the board, in order to enable him occupying White's liberties below. Therewith, he would have pushed himself below the Punishment Semeai Liberty Level, so losing the game by a very large margin.

:
Black takes some profit at the top.

:
White continues in the lower left corner.

Please note that the hanezeki will remain untouched, as both large groups live independently.

According to our estimation, ...
White will win the game by about 20 points.

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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