:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

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

: ( 222mi)
Black ocuupies a liberty of White's group at the left.

:
White's cut in the corner starts a simple, and clear-cut, line of play.

Playing the oki at , instead, would not affect the final result of the game.

:
Black is forced to give atari from above.

; :
White could even do without this exchange.
Please note that Black must not give atari from below, with a move at .

:
White's throw-in addresses Black's shortage of liberties at the upper edge.

:
Black is forced to capture.

:
White starts approaching Black's corner from the top right.

:
Black captures White's two stones in the corner.

:
But he is still unable to connect his six stones.

:
Eventually, White captures for a large gain.

:
White connects her two stones, as there is no large endgame spot left on the board.

Black plays 4/4 reductions.

Capture Variation:

Compared to the superordinate variation ...

  • Black's cumulated loss in the upper left corner is one point.
  • White captured six Black stones at the top, so gaining twelve points.
  • Black destroyed one point of White's territory in the centre.
  • Black destroyed one point of White's territory in the upper right corner.

In total, White gained eleven points.

White + 4 => White + 15

Semeai Variation:

Compared to the superordinate variation ...

  • Black's cumulated loss in the upper left corner is one point.
  • White captured six Black stones at the top, so gaining twelve points.
  • White lost one point of territory in the upper right corner.
  • White captured an additional Black stone in the centre, so gaining one point.
  • White captured an additional Black stone in the upper right corner, so gaining one point.

In total, White gained fourteen points.

Jigo => White + 14

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