:: Igo Hatsuyôron 120 (2017)

Variations of the Professional Solution

VARP (.2)

(Referenced by 1092p)


: ( 718; 730a)
White starts the endgame at the left side of the board "early" by choosing the tsuke of Yamada Shinji.

: (A 730e)
Black plays Tenuki (here for playing guzumi), as he does in the corresponding variation for the "later" kikashi in the bamboo joint of Michael Redmond (there for capturing two White stones; 738c).

Black must not follow the "usual" course of the endgame sequence in the upper left corner by continuing at .

:
White reduces Black's upper left corner, before ...

:
... answering Black's guzumi "late".

:
Black continues with the Hasami-Tsuke Sequence.

:
Black gained one additional liberty in the Main Semeai from the guzumi, so he is able to defend his territory in the lower left corner.

:
White continues with the "usual" course of mutually occupying opponent's liberties in the Main Semeai.
Black lost all his surplus liberties for the Main Semeai, so the point of in the centre will become White territory.
Black connected both hasami-tsuke stones, so White will choose the Semeai Variation here, which is two points better for her than the Capture Variation.

///:

The comparison of the final positions in the left half of the board (Professional Solution at the left) shows:

  • Due to the reduction of his top left corner, Black lost five points of territory ().
  • White gained two points of territory at the top ().
  • White did not capture Black's single stone at the bottom, so losing two points of territory ().
  • Black gained three points of territory in the lower left corner ().

The comparison of the final positions in the right half of the board (Professional Solution at the left) shows:

  • White lost six points of territory in the top right corner ().
  • White captured three more stones (), so gaining six points of territory.

In total, White gained two points, compared to the Semeai Variation of the Professional Solution that ended with four points for Black, so ...


Black wins by two points.

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