:: Igo Hatsuyôron 120 (2022)

New Story Line 2022

Joachim's Hiki at the Upper Edge

(Joachim's Ko-Semeai #1)

VAR

: ( 2034)
White descends to the upper edge.

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Black fills his false eye at the left edge in return.

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White occupies an outside liberty of Black's group.

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Another example of KataGo's preference for kikashi.

Black could have immediately connected at .

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Black fills one of the ko-shapes.

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White occupies another Black liberty on the outside.

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Black starts a ko-fight in the upper left corner.


Ko: ; ; ; ; ; ; ; ;

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White captures the nakade at the left edge as a ko-threat.

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White is ready to capture the hanezeki's tail, and so splits the Nakade Sequence for a gain of additional ko-threats.

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Black's first ko-threat at the right side of the board.

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Black erases some White ko-threats in the left centre.

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White occupies the last but one outside liberty of Black's corner group, turning the ko into a direct one.

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Finally, White captures the hanezeki's tail.

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Black has to recapture.


Ko: ;

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White plays Joachim's Oki, which makes sure that her ensuing ko-threats in the lower right corner will win her the ko-fight, and so the game.

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A typical kikashi again.

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Black terminates the ko-fight, as he cannot match White's unused ko-threats in the hanezeki.

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White captures Black's upper left corner.

White will win the game by a large margin

2034

Copyright © 2022 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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