Good Empty Triangle / Solution

Sub-page of GoodEmptyTriangle
[Diagram]

Empty triangle

Black wins the semeai. In a real game, even a strong fighter might miss B1.

Bob Myers: A wonderful tesuji, but not an empty triangle as the term is commonly used, so in that sense this problem is in the wrong place.


[Diagram]

White cannot run

[Diagram]

Looks like tesuji

B1 looks good, but W6 is skilful play, and the best Black can do is to make a ko.

[Diagram]

Bamboo joint instead?

Hans: What about black 1?

ChaoSpectre: What about it? I know this is presumptuous for a DDK to say, but doesn't making the bamboo joint here encourage a seki here? Or something else? Playing B1 here is a very nice move, indeed, but doesn't it give sente to white? I can't exactly play this position out from here, so I may be missing out on some huge detail. Would somebody (Possibly Hans?) play this out after B1?

Mef: As far as I can tell, white will at least be able to get a ko with W2 through W8.

[Diagram]

Key point

Bill: B7 is still the key point. White cannot connect.

Likewise, in the previous diagram, B5 should be at B6.

[Diagram]

Ko (2)

W11 takes ko.

Bill: Does W1 make ko?


This is a copy of the living page "Good Empty Triangle / Solution" at Sensei's Library.
(OC) 2005 the Authors, published under the OpenContent License V1.0.
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