Beginner Exercise 10 / Solution

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[Diagram]

Solution

This diagonal W1 is a fairly common technique move in capturing races. It prevents Black from playing at either marked point immediately. It requires Black an additional move at a to approach, while taking away a Black liberty. Thus White wins the capturing race by one move.

[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 (B2 elsewhere)

W1 will be ignored - Black can wait for W3 to play B4 making it a false seki. Because the group of stones containing W3 is dead, so all the white stones are dead.



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