:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222bc)
White erases her weakness in the guzumi area, also occupying one of Black's liberties at the right.

: (118 222be)
Black defends his territory in the left centre.

Capturing White's two stones in the lower left with , instead, would not affect the overall result of the gaim, but benefit White in the Semeai Variation unnecessarily.

:
White continues with the endgame in the lower left corner.

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It is best for Black to play tenuki.

:
White is able to connect her two stones in the lower left.
Please note that this connection loses two tempi in the Main Semeai.

:
This enables Black to capture White's single stone at the upper edge.

:
Black is one over par with the Punishment Semeai Liberty Level, so the push at the top is feasible.

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Black uses his second surplus Main Semeai Liberty to push at the upper edge for another time.

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After this connection, Black is back to par again.

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The Main Semeai continues.

Black must not play any reduction.

Capture Variation:

Compared to the superordinate variation ...

  • Black captured one White stone in the upper left.
  • Black destroyed two points of White's territory at the upper edge.
  • Black did not capture White's two stones in the lower left, so losing four points.

In total, White gained one point.

White + 3 => White + 4

Semeai Variation:

Compared to the superordinate variation ...

  • Black captured one White stone in the upper left.
  • Black destroyed two points of White's territory at the upper edge.
  • Black captured one White stone more in the lower left, so gaining two points.

In total, White lost five points.

Jigo => Black + 5

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