:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

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

: ( 222co)
White occupies a liberty of Black's large group at the right.

:
Black occupies a shared liberty in the centre in return.

:
KataGo likes to play this capture at the top in -between.

:
White arms the ko fight in the upper left corner.

:
The ko fight begins.

:
White captures.

He is unable to connect the ko in the corner with , instead.
White would give double-atari at , killing Black in a double snap-back.

:
Black gives atari at the upper string of White's left-hand group.

:
It is best now for White to capture the hanezeki's tail.

:
Black recaptures.

:
White terminates the ko fight in the upper left corner by giving atari at Black's cut-off stones.

:
Black start the endgame with the large descent to the lower edge.

:
The endgame continues.

The final endgame ko will be connected with , , .

Capture Variation:

Compared to the super²ordinate variation ...

  • White captured eight Black stones in the upper left corner, so gaining 16 points.
  • Black's cumulated gain in the nakade area is six points.
  • Black did not capture White's two stones in the lower left, so losing four points.
  • Black's cumulated gain in the lower left corner is four points.
  • White's cumulated gain in the upper right corner is one point.
  • Black's cumulated gain in the right centre is six points.
  • White did not capture Black's stone in the lower right, so losing two points.

In total, White gained three points.

White + 7 => White + 10

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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