:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (Ib)

KataGo's 2021 Solution

VAR (.1)

: ( 58am)
Black connects his stone in atari.

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White gains one point overall by pushing at the left edge.

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Thereafter, White further reduces Black's corner territory by playing hane at the upper edge.

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Black's push at the top is sente.

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Black returns to the upper left, defending his corner.

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Black captures White's single stone in the right centre.

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White continues the game by following a well-known path.

Black plays 3/3 reductions.

Before the end of the game, White will have to play a protective move, e.g. at , at the upper edge. Black will capture with .

Capture Variation:

Compared to the superordinate variation, ...

  • White destroyed one point of Black's territory in the upper left corner.
  • White got an additional three points of territory at the upper edge.
  • White did not capture Black's stone in the lower left, so losing two points.
  • Black captured White's stone in the right centre, so gaining two points.
  • Black destroyed one point of White's territory in the upper right corner.

In total, Black gained one point.

White + 11 => White + 10

Semeai Variation:

Compared to the superordinate variation, ...

  • White destroyed one point of Black's territory in the upper left corner.
  • White got an additional three points of territory at the upper edge.
  • White did not capture Black's stone in the lower left, so losing two points.
  • White captured one Black stone more in the upper right corner, so gaining one point.
  • Black destroyed one point of White's territory in the upper right corner.
  • White got an additional two points of territory in the right centre.

In total, Black lost four points.

White + 6 => White + 10

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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