:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (IIIb)

Tricking KataGo (Triple-Ko)

VAR (C) (A) (.2) (.2) (.1)

(.1)

: ( 222di)
Black captures White's stone at the right edge, threatening to live independently with his large group at the right.

For demonstrative purposes, we will let Black live at the right. Therefore, we refrained from colouring the boards' edges in this subvariation.


Ko: ; ; ;

:
However, usually it is not a desirable goal for Black to merely live on the right alone. And so it is here, too.

White connects in the upper right corner.

:
Black has to give atari immediately.

:
White turns the ko into a direct one.

:
Black starts the ko fight.

:
Black has to answer White's threat, because he cannot get more than a seki in the corner. And so he needs a second eye for his group at the upper edge.

:
White captures the nakade.

:
However, White's previous move does not contain a real threat, so Black connects the ko.

:
White lives independently at the left.

:
Black does so at the right.

:
White secures a second eye for her centre group.

:
All large groups are independently alive, so it starts an amateurish idea of the ensuing endgame.

The hanezeki will remain untouched.

White wins the game by 12 points.

This is the same score as with the ko fight in the superordinate variation.

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

L e g a l   n o t i c e