Beginner Exercise 10 / Solution

Sub-page of BeginnerExercise10

Solution by lavalyn 17k:

[Diagram]

Diagonal tesuji

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. Thus White wins the capturing race by one turn.

Complete diagram:

[Diagram]

White wins the race


lavalyn has posted the correct solution. -- unkx80


[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.


unkx80 adding failure diagrams.

[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.



This is a copy of the living page "Beginner Exercise 10 / Solution" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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