:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222bc)
Black captures White's two stones in the lower left, continuing with the Main Semeai.

: ( 116 222bg)
White gives atari in the top left corner.

However, Black is not bound to the Punishment Semeai Liberty Level, so White must erase her weakness in the guzumi area, instead.

:
But she ends in gote there.

: ( 118 222bh)
Black takes the opportunity to capture White's single stone at the upper edge.

However, playing the newly found push with in the upper right would be two points better overall.

:
White defends the guzumi area, also continuing with the Main Semeai.

:
Black pushes once again at the upper edge.

:
He is also able to connect his two stones, spending his last surplus Main Semeai Liberty for this move.

:
The Main Semeai continues.

: ( 133 222bi)
White occupies a Black liberty at the right.


However, she would benefit by one point overall, if she played the wedge in the left centre.

Black must not play any reduction.

Capture Variation:

Compared to the superordinate variation ...

  • White destroyed two points of Black's territory in the upper left corner.
  • Black's cumulated gain at the top is one point.

In total, Black lost one point.

White + 3 => White + 4

Semeai Variation:

Compared to the superordinate variation ...

  • White destroyed two points of Black's territory in the upper left corner.
  • Black's cumulated gain at the top is one point.

In total, Black lost one point.

Jigo => White + 1

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