Beginner Exercise 10 / Solution

Sub-page of BeginnerExercise10
[Diagram]

Solution

This diagonal is a fairly common first move in these capturing races - it doesn't take up internal liberties and it prevents Black from moving at either marked point before defending that stone - one move. Effectively it creates a double shortage of liberties for Black, thus White wins the capturing race by one turn.

[Diagram]

White wins the race

This diagram shows how White wins the race.

[Diagram]

Failure 1

W1 here loses the capturing race. Note that B2 is the only correct play.

[Diagram]

Failure 2

This fails as well.

[Diagram]

Failure 3

W1 and W3 appears to create a seki, but this is not a seki. Because the group of stones containing W3 is dead, so all the white stones are dead.

In fact, B2 can even play tenuki. The reason behind this is left as an exercise for the reader.


[Diagram]

Another Possible Solution?

B6 at B2 -- ProtoDeuteric

Bill: B2 loses 1 1/3 points: 1 point for the the point on B4, and 1/3 point for the stone left in atari in the ko.



This is a copy of the living page "Beginner Exercise 10 / Solution" at Sensei's Library.
(OC) 2011 the Authors, published under the OpenContent License V1.0.
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