:: Igo Hatsuyôron 120 (2020)

Variations of Our Solution (IIIa)

No Early Kikashi

VAR (.3) (.1) (.1)

: ( 648jx)
White connects the ko at the upper edge, so losing another move in the Main Semeai.

; :
Black plays his remaining kikashi on the lower side of the board.

:
White must capture the nakade.

:
Finally, White connects her two stones that were in atari.
Thereafter, Black is securely ahead by five liberties in the Main Semeai.

White will not choose Dany's Sacrifice here, as Black will win the game.
If she did, Black would be unable to reduce White's territory in the upper right with and . These gains, however, would not be sufficient to compensate for her loss in the lower left (four points). Additionally, her kikashi in the lower left corner would no longer be effective, providing Black with another point.
Last, but not least, Black would still be ahead by 10 liberties in the Main Semeai, so that his large group in the upper right would survive the Semeai Variation.
The final scores would become Black + 2 / Black ++.

Black plays 4/7 reductions.

With 7/7 reductions, the final scores would be Black + 2 / White + 6.

After Black occupied White's liberty at , White will force him to capture her single stone in the left centre "early". Thereafter, she will play her kikashi , in the lower left corner, so that Black has to capture at before the end of the game.

Capture Variation:

Compared to the superordinate variation ...

  • White recaptured Black's stone at the upper edge, so gaining one point.
  • Black destroyed one point of White's territory at the top.

In total, gains and losses compensate for each other.

White + 1 => White + 1

Semeai Variation:

At White's decision point, Black's large group in the upper right will have ten liberties, nine direct liberties (), and one approach-move liberty (), so White will be unable to capture it.

Black will win the game by a large margin.

Copyright © 2020 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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