:: Igo Hatsuyôron 120 (2022)

Timing of the Guzumi Without

Harry's Hasami-Tsuke Sequence (2022)

VAR

: ( 1868)
Black connects his hasami-tsuke stone.

:
White connects along the upper edge, making sure that her stones to the right cannot be captured by Black.

:
Black plays my Guzumi.

:
Sometimes, KataGo likes to answer with the solid connection, instead of completing the Guzumi Exchange with .

Usually, the final outcome of the game will be affected, as the only drawback is the option of a now additional Black ko-threat with .

:
Black continues with the Nakade Sequence.

:
KataGo likes to insert this kikashi in the left centre.

:
White does not connect her two stone in the lower left, as to keep Black down at the Punishment Semeai Liberty Level, but starts the endgame on the left side of the board with Yamada Shinji's Tsuke, instead.

:
In-between, White captures Black's hasami-tsuke stone.

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Black is forced to also occupy a Main Semeai Liberty.

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

:
White captures the nakade.

:
The game follows a well-known path for a while.

:
Cheng's Bump in the left centre.

:
White's previous move was played outside the Main Semeai Area, so Black takes the opportunity to reduce White's territory at the top a bit.

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White rescues her single stone in the left centre.

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KataGo likes to insert this sequence in the left centre that leeds to nothing.

:
Black plays 1/1 reduction.

Capture Variation:

Compared to the super²ordinate variation, ...

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

In total, Black gained one point.

White + 5 => White + 4

Semeai Variation:

Compared to the super²ordinate variation, ...

  • Black's cumulated gain in the upper left corner is five points.
  • Black's cumulated gain at the top is one point.
  • White's cumulated gain in the left centre is one point.
  • White's cumulated gain in the lower left corner is five points.
  • Black captured one White stone less in the left centre, so losing two points.
  • The net result in the upper right corner is zero.

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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