:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (Ib)

KataGo's 2021 Solution

VAR (.1)

: ( 58aj)
Black extends in the corner.

:
White cuts on the outside, capturing Black's two stones above.

:
Black captures two White stones in the corner in return.

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

: ( 116 58an)
Black plays tenuki after White's atari, as usual.

However, Black would benefit by one point overall, if he connected at , instead.

:
White gives atari at the nakade, continuing with a well-known-sequence in the left centre.

:
White's push at the left edge gains one point overall.

:
White forces twice at the top, ...

:
... before answering White's move at the left edgel

:
White connects her single stone in the right centre.

Black plays 3/3 reductions.

Before the end of the game, White will capture at , and Black at .

Capture Variation:

Compared to the super²ordinate variation, ...

  • White's cumulated gain in the upper left corner is eight points.
  • White's cumulated gain at the upper edge is three points.
  • White did not capture Black's stone in the lower right, so losing two points.

In total, White gained nine points.

White + 2 => White + 11

Semeai Variation:

Compared to the super²ordinate variation, ...

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

In total, White gained ten points.

Black + 4 => White + 6

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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