:: Igo Hatsuyôron 120 (2022)

New Story Line 2022

Joachim's Hane at the Top

(Joachim's Ko-Semeai #2)

VAR

: ( 2030)
Black connects in the upper left corner, so continuing with the course of the Main Semeai.

:
White prevents the easy capture of her left-hand group.

:
Black starts the creation of the nine-point nakade.

:
Black plays tenuki in-between, in order to initiate the Guzumi-Exchange.

Please note that his exchange creates an additional approach-move liberty for Black, so that he can connect his hasami-tsuke stone again.

:
Black continues with the interrupted Nakade Sequence.

:
As usual, Black ends in gote.

:
White's diagnonal jump starts another of KataGo's unbelievable inside attacks on Black's upper left corner.

: (A 2030b)
Black blocks on the outside.

Alternatively, he might also attach White's just played stone from the inside, with a move at .

:
White is preparing for a living group inside Black's corner.

:
Black is preparing for a living shape at the top.

:
Black secures two eyes for his group in the upper left.

:
White establishes two eyes for her invasion group in return.

:
Black connects his hasami-tsuke stone.

:
White continues with the usual hasami-tsuke in the lower left corner.

:
Black takes the opportunity to capture White's single stone in the right centre.

:
White is forced to create a second eye for her centre group.

:
The Semeai Variation will be better for White than the Capture Variation, so Black has to prevent White's gote move at this point.

:
A kikashi in the upper left corner.

:
White will choose the Semeai Variation, so she sacrifices her two stones in the lower left.

Territory (in the Semeai Variation):

There is no place on the board, where Black could compensate for his large loss in the upper left corner (compared to the correct line of play).

White will win the game by 14 points.

2030

Copyright © 2022 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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