Beginner Exercise 2 / Solution
![[Diagram]](../../diagrams/49/a3d0052808a3e3ecfe498837752ee8d3.png) | Solution |
After , White can't play at a because of shortage of liberties.
If White plays at b then Black answers at a. White can capture Black's stones, but that leaves her with a three in a row shape.
See also rectangular six in the corner.
Failure diagrams (Jasonred, ArnoHollosi):
![[Diagram]](../../diagrams/22/87a5abd0fc56f9e572739c21d9a51041.png) | Incorrect: leads to ko for life |
(The question says "kill White without ko".)
![[Diagram]](../../diagrams/16/526ce4203d38e69d79734d5161217d46.png) | Variation |
What if White plays somewhere else?
If White answers with here, Black plays . White would like to play at as well, if Black plays at a or b. Why?
![[Diagram]](../../diagrams/51/817e76e792acb0068fcceff673aecb5d.png) | Bulky five |
Because if we add to the 2x3 square we get a shape called bulky five (marked). And that shape can be killed by playing on the vital point, marked with a square.
![[Diagram]](../../diagrams/25/b49580b2c0ea54834f2dadbac36b6946.png) | Bulky five (again) |
So, after and in the variation diagram, we have a bulky five shape, with one point already occupied by Black. However, the vital point marked with a square has not been played yet. That is why Black plays at next. (And that is why White trying to live with in the first diagram seems like a good idea - but fails as well.)
Try to memorize the bulky five shape. It occurs over and over again.
See also:
This is a copy of the living page
"Beginner Exercise 2 / Solution" at
Sensei's Library.
2004 the Authors, published under the OpenContent License V1.0.
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