:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2) (.2) (.2) (.4)

(.1)

: ( 222ia)
White block at the top defends her territory there, but loses one tempo in the Main Semeai.

:
Black inserts Michael Redmond's kikashi in the bamboo joint.

If he did without this kikashi, White would peep at the upper edge with , so gaining her lost tempo in the Main Semeai back.

:
It is best for White to answer with the atari.
But capturing Black's hasami-tsuke stones this way round needs one more move than after of the peep at .

:
Black will sacrifice both of his hasami-tsuke stones, so gaining an additional tempo in the Main Semeai.
This gain enables him to capture White's stones in the upper left corner.

:
White starts the endgame at the left side of the board "early".

Black must not play any reduction.

After her decision point, White will exchange for .

Capture Variation:

Compared to the superordinate variation ...

  • White's cumulated gain at the top is six points.
  • White got an additional six points of territory in the upper right corner.
  • Black got an additional 18 points of territory in the upper right corner.

In total, White lost six points.

Black + 2 => Black + 8

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

L e g a l   n o t i c e