:: Igo Hatsuyôron 120 (2022)

Timing of the Guzumi (2022)

VAR

: ( 1813)
White captures Black's single stone in the Nakade Area.

This is one of KataGo's self-play games with a komi of -1.

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Black's connection is forced.

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White occupies the Guzumi Point.

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Black answers with Michael Redmond's Kikashi in the Bamboo Joint.

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White plays the initial moves after Yamade Shinji's Tsuke in the upper left, ...

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... before answering Black's earlier kikashi with the solid connection, not losing any tempo in the Main SEemai.

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Black gives atari at White's two stones in the lower left.

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White ignores Black's atari, an continues at the upper edge.

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Black takes some profit within the Main Semeai Area, and consequently loses points in the Semeai Variation.

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White's hasami-tsuke starts the reduction of Black's potential territory in the lower left corner.

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White's push at the upper edge does the same with Black's upper left corner.

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The game follows a well-known path.

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KataGo resigned here.

The ensuing sequence has been generated using KataGo's Analysis Mode.

...

Black must not play any reduction.

Capture Variation:

Compared to the superordinate variation, ...

  • Black's cumulated gain in the upper left corner is three points.
  • Black destroyed one point of White's territory at the top.
  • White's cumulated gain in the left centre is one point.
  • White's cumulated gain in the lower left corner is five points.
  • Black destroyed three points of White's territory at the upper right edge.

In total, gains and losses compensate for each other.

White + 3 => White + 3

Semeai Variation:

Compared to the superordinate variation, ...

  • Black's cumulated gain in the upper left corner is three points.
  • Black destroyed one point of White's territory at the top.
  • White's cumulated gain in the left centre is one point.
  • White's cumulated gain in the lower left corner is five points.
  • White's cumulated gain at the upper right edge is one point.
  • Black captured one White stone more in the left centre, so gaining two points.

In total, White gained two points

Jigo => White + 2

Copyright © 2022 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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