:: Igo Hatsuyôron 120 (2022)

New Story Line 2022

Jérôme Hubert's Correction of the Mutual

Occupation of Opponent's Liberties

VAR

: ( 2041)
Black plays Cheng's Tenuki in the upper left, in order to defend his own territory there, and to threaten White's territory at the top.

:
White captures Black's single stone in the lower left, in sente.

:
Cheng's Bump in the left centre must be played before defending the top, as blocking with is gote.

:
White defends her territory at the top.

Please note that returning to the right side of the board with a move at would be a mistake here, as Black's large group has too many Main Semeai Liberties left.
Black would reply with the push to , whereafter and are miai. Black would benefit by one point unnecessarily.
If White secured one point of territory in the right centre with , Black would push once more with . Thereafter, White could enforce the complete resolving of the hanezeki, but would have to return to the defensive move at the top.

Capture Variation:

Compared to the superordinate variation, ...

  • Black got an additional point of territory in the upper left corner.
  • Black destroyed one point of White's territory at the top.
  • White captured Black's stone in the lower left corner, so gaining two points.

In total, gains and losses compensate for each other.

White + 1 => White + 1

2041

Copyright © 2022 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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