Beginner Exercise 47 / Solution

Sub-page of BeginnerExercise47

W1 creates a ko. Black cannot respond at a because of shortage of liberties. Any response that does not threaten W1 (except b, discussed below) will capture the two black stones at the right in a snapback (White b, Black a, White b).


B2 connects and W3 sets up the ko in which Black takes first at a. If White wins the ko, he captures four Black stones at b.

If Black wins the ko  

If Black wins the ko, Black lives with B4 and B6.

White can't avoid ko  

Black cannot avoid the ko by connecting at B4, as W5 captures all the Black stones.

Inferior for Black  

Black can also start a ko with B2. However, this ko is inferior for Black when compared to the solution because after W3 takes the ko, Black has to find the first ko threat (see try to get first capture in a ko).

Beginner Exercise 47 / Solution last edited by on July 18, 2014 - 15:55
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