:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (Ib)

KataGo's 2021 Solution

VAR

: ( 58aa)
White retreats by jumping back to the second line.

:
Here, Black pushes first from the left, further reducing White's corner.

He could also change the order of moves and start with or .

:
Black gives atari.

:
White has to connect.

:
This move ends the alternate sequence for the upper right corner.

:
Black starts the hanezeki's tail's wandering through the centre of the board.

///:

:
White continues with the sequence in the upper left corner after the tsuke of Yamada Shinji.

:
White gives atari at Black's nakade.

: (A 58ac)
Black solidifies his formation in the upper left centre.

Alternatively, he might consider protecting his cutting point below with the guzumi at .

:
White captures the nakade.

:
White starts the endgame in the lower left corner, as usual.

:
White plays KataGo's bad-shape move in the left centre.

:
Black answers with the solid connection.

:
White must connect her single stone in the upper right.

: (134 58ag)
Black captures White's single stone at the upper edge.

Alternatively, Black could push into White's territory at the top first.

:
White blocks.

:
Black is able to push once again at the upper edge.

:
Black is able to connect.

:
The Man Semeai continues.

Black plays 1/1 reduction.

Capture Variation:

Compared to the superordinate variation, ...

  • White got an additional point of territory in the right centre.
  • Black destroyed one point of White's territory in the upper right corner.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation, ...

  • White got an additional point of territory in the right centre.
  • White captured two Black stones less at the upper edge.
  • White captured two Black stones more in the upper right corner.
  • White captured one Black stone less in the right centre.

In total, gains and losses compensate for each other.

Black + 4 => Black + 4

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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