:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222et)
White wedges into Black's formation in the upper left.

:
This atari from the outside is a natural response.

:
White gives atari, also preventing Black's move at this point.

:
Black's diagonal move defends to the right as well as to the left.

:
White continues with the endgame at the lower edge.

:
Black connects, as there is no other valuable endgame spot on the board.


:
White's wedge in the left centre will benefit her by one point.

:
This is KataGo's bad-shape move in the left centre.

:
Black has to defend this cutting point - sooner or later.

Black must not play any reduction.

After her decision point, White will give atari at , Black will connect at .

Capture Variation:

Compared to the superordinate variation ...

  • White's cumulated gain in the upper left is two points.
  • White did not capture Black's stone in the lower left, so losing two points.

In total, gains and losses compensate for each other.

Jigo => Jigo

Semeai Variation:

Compared to the superordinate variation ...

  • White's cumulated gain in the upper left is two points.
  • White did not capture Black's stone in the lower left, so losing two points.

In total, gains and losses compensate for each other.

Black + 5 => Black + 5

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