:: Igo Hatsuyôron 120 (2015)

Joachim's Ko-Semeai - Putting the Cart

Before the Horse (2013 - 2015)

Invalid Ko-Threats (I) - Black's Atari

on the Upper Edge

(Referenced by 1048)


:
White has just captured the ko at , but this atari on the upper edge is no valid ko-threat here.

:
White simply connects the ko, and lets Black capture her single stone on the upper edge.

:
Black threatens White's stones on the left edge.

:
Again, White ignores Black's threat. She reduces Black's large group in the upper right to only two liberties.

:
Finally, White gives atari. There is nothing Black could do to prevent White from capturing at . Black captured White's entire left side (), but capturing Black's right side () is much bigger. White wins the game with ease.

Copyright © 2016 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

L e g a l   n o t i c e