Beginner Exercise 10 / Solution

Solution  

This diagonal 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.

White wins the race  

This diagram shows how White wins the race.

Failure 1  

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

Failure 2  

This fails as well.

Failure 3 ( elsewhere)  

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