:: Igo Hatsuyôron 120 (2022)

Timing of the Guzumi Without

Harry's Hasami-Tsuke Sequence (2022)

VAR

: ( 1863)
Black's "usual" solid connection securely closes the upper border of his lower left corner.

We inserted this move manually.

:
White captures the nakade.

:
White interrupts the Nakade Sequence for inserting Yamada Shinji's Tsuke.

:
KataGo seems to be fond of this wedge in the left centre.

:
The time has come to occupy the Guzumi Point.

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

:
White chosses the solid connection, so keeping Black par with the Punishment Semeai Liberty Level.

:
Black strengthens his formation in the left centre.

:
Black captures White's single stone at the lower edge, instead of giving atari at the upper edge with .
This alternative option does not affect the overall result of the game, but will benefit White in the Semeai Variation.

:
White pushes into Black's upper left corner.

:
White erases a hidden weakness in the Guzumi Area (but which Black could exploit only after winning at tempo in the Main Semeai).

:
White does not connect her two stones in the lower left, again keeping Black par with the Punishment Semeai Liberty Level.

:
White gives atari at Black's two stones at the top.

:
Black captures White's two stones in the lower left.

:
White captures two Black stones at the top in return.

:
Black plays 1/2 reductions, ...

:
... before taking profit outside the Main Semeai Area by recapturing in the upper left, losing another tempo in the Main Semeai.

:
Black is par with the Punishment Semeai Level again, and can do nothing more but to occupy White's liberties at the left.

Capture Variation:

Compared to the superordinate variation, ...

  • Black's cumulated loss in the upper left corner, and at the top, is one point.
  • White did not capture one Black stone in the left centre, so losing one point.
  • Black got an additional point of territory in the left centre.
  • Black destroyed one point of White's territory in the upper right corner.

In total, Black gained two points.

White + 5 => White + 3

Semeai Variation:

Compared to the superordinate variation, ...

  • Black's cumulated loss in the upper left corner, and at the top, is one point.
  • White did not capture one Black stone in the left centre, so losing one point.
  • Black captured one White stone less at the left, so losing one point.
  • White captured one Black stone more at the right, so gaining one point.

In total, Black lost two points.

Jigo => White + 2

Copyright © 2022 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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