RTG Problem 47 / Attempts

Sub-page of RTGProblem47
[Diagram]

Black to play

Anonymous: If W plays at a, she has 2 eyes. Therefore, B only needs to consider 2 options. It looks like 'b' kills.

[Diagram]

Black to play

If W cuts off the 3 black stones, B can make them into Nakade. (Dieter: B3 must be played at B5, because otherwise White plays there, not at W4 like in this diagram.)

[Diagram]

Black to play

B3 and B5 at the square-marked stone. Saving the 3 black stones at 'a' and saving B5 by playing at the circle-marked stone are miai for B to reduce W to only 1 eye. (Dieter: but after WHite a and b, White has miai in the corner for two eyes)


[Diagram]

Dieter's attempt (1)

[Diagram]

continuation

[Diagram]

continuation

Dieter: the end result is ko. I agree this is an expert level problem. I didn't see B11 before looking at the situation after W10, so you cannot say I have properly solved it.

unkx80: Almost there, you saw B11 but missed B13. Actually for me the problem diagram was totally misprinted, and I had to reconstruct it from the solution diagram, so I never got a chance to solve it at all.

[Diagram]

Failure at B3

W4 makes miai of a and the marked stone.


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