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Lucky's Problem Solution 1
    Keywords: Tactics

[Diagram]
White to play and capture two stones.

DaveSigaty: White 1 loosely surrounds the two black stones. The marked stone is in just the right place to prevent Black from pushing out along the right side.


[Diagram]
Black tries to escape 1

If Black 1, White plays 2 and squeezes Black. White 10 completes a nice symmetrical shape.


[Diagram]
Black tries to escape 2

If Black 1, the standard reply at 2 stops Black cold.


[Diagram]
Black tries to escape 3

This Black 1 seems the most interesting but it looks like the combination of 2 and 4 prevent Black from getting away. If Black continues at 5, White throws in at 6 and catches Black short of liberties after 10.


[Diagram]
Black tries to escape 3

Oops! This idea would work if Black co-operates. However, Black 7 instead puts White on the spot. Capturing at a and escaping at b are miai to save the stones.


[Diagram]
Black tries to escape 3

White has to be more careful and connect at 6 against 5. Now Black is again short of liberties after 10. If next Black at a, White plays b.


[Diagram]
Black tries to escape 3

If Black cuts at this 5 instead, White plays atari at 6. If Black captures, the throw in at 8 recreates the shortage of liberties. If Black connects at 8 instead of 7, White simply connects at 7.



Lucky

[Diagram]
White can also connect

Actually White can also connect at 6 in the previous diagram.


[Diagram]
First theme

When I composed this problem I wanted to find a position where the marked stone works but the usual geta doesn't. It was designed for low kyu players at the club.


[Diagram]
Great move

But I was very happy with move 4. This makes it quite a difficult problem to get in your head.


[Diagram]
Hmmm...

I think I have further work to do on this position because White 1 is still good and it should be bad :)


[Diagram]
Hmmm... 2

This result is better for White though she doesn't capture two stones.


[Diagram]
No good

And no, it's no good to move the marked black stone one line to the right.



[Diagram]
Suggestion

unkx80: How about changing the problem to this one? As far as I can see, this problem should work too, although the difficulty is increased a bit.

Lucky: This seems to work too :) And resolves the previous problem. Why do you think this position is more difficult?


[Diagram]
Variation

unkx80: In this variation, I think White 5 is the only move here, which may be a kind of a blind spot.

Lucky: Well, I didn't check this variation :) I agree it might be a blind spot.


[Diagram]
Variation

Compared to the original problem, White 9 must be played here instead, I believe. Playing at a turns it into a ko.

You may think otherwise about the difficulty? I don't know. =)

Lucky: True, I first found the ko and I was ready to conclude this variation doesn't work.

I don't know how problems can be rated. As with all amateurs, I know some positions (which therefore I find easy) and I don't know a lot of others (which I find difficult). I may solve a pro level problem if I have seen it before and go wrong with an amateur 5 kyu problem.



This is a copy of the living page "Lucky's Problem Solution 1" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.