Beginner Exercise 165 / Solution

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Vital point  

The placement of B1 is the vital point for killing the White group.

White connects  

If W2 connects, then B3 blocks and decreases White's eye space. Now a and b are miai for the kill.

White tries to increase his eye space  

If W2 tries to increase his eye space, then B3 can simply block. W4 still has to connect, and then B5 and B7 is the standard killing sequence as before.

White resists the other way  

If W2 resists by blocking here, then B3 forces white to defend his eye at a with W4, before making the throw-in at B5. When W6 captures...

White is dead  

B7 makes a second throw-in, falsifying White's eye on the left side.

More advanced note: In the previous diagram, it is also possible for Black to omit the B3-W4 exchange and play directly at B5. But the forcing move is beneficial for Black because it removes aji at the exterior side.


Directly blocking at B1 is a mistake, allowing W2 to live.

Note that if W2 is played at a, then Black kills with W2.

Beginner Exercise 165 / Solution last edited by on February 24, 2014 - 15:07
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