:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222do)
Black blocks at the left edge.

: ( 155 222dq)
White's connection in the corner is sente, opening a path to a "peaceful" win.

She might consider doing without this move, as Black is forced to play an additional defensive move in the corner anyway.

As a matter of course, White would benefit from starting the ko fight in the upper left corner, instead, with playing the second hane at , instead.

:
White continues with occupying Black's liberties at the right.

:
Black must take White's stones their third liberty.

:
Now, Black is safe to occupy White's last liberty at the left.

Please note that his group at the right has eight liberties left (with White to move).

:
In order to simplify the presentation, we show the endgame before capturing the hanezeki's tail.

:
Black connects.

Alternatively, he might consider capturing at the top with .
White will capture at in sente before descending to at the upper edge. The final result of the game will remain unaffected.

Capture Variation:

Compared to the super³ordinate variation ...

  • White destroyed eighteen points of Black's territory in the upper left corner.
  • Black's cumulated gain at the top is eleven points.
  • White did not capture Black's stone in the lower left, so losing two points.

In total, White gained five points.

Jigo => White + 5

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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