Beginner Exercise 3 / Solution

Sub-page of BeginnerExercise3

This exercise uses the concept of miai.

B1 is the only way to live, which makes W2 and B3 miai. That is, if White plays at W2, Black lives with B3; if White plays W2 at B3 instead, Black lives with B3 at W2. The concept of miai is that there are two (more or less) equivalent points, so each player will get either one.


In solving this exercise, this reference diagram is also very useful. It is the same as the problem except with the black+circle stones added, so it becomes a basic T-shaped four-space big eye (called the pyramid four), The point a is the vital point. If White plays at a, Black is killed; if Black plays at a Black lives.


With the reference diagram it becomes easy to explain why enlarging the eye space at B1 fails. Even though there is no stone at a, the concept is still the same. So W2 kills the black group.

I leave it as an exercise for the reader to see what happens if Black plays his first move at a instead.

See also:

Beginner Exercise 3 / Solution last edited by on March 17, 2009 - 07:57
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