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Trumpet Connection
Keywords: Go term
A white cut at a looks like a good possibility, but Black can't patch up both weaknesses in one move ... or can he?
By playing 1, Black creates a trumpet connection, which protects both possible sites for a cut. The trumpet connection is also called the lion's mouth, and is related to the tiger shape, though the trumpet connection is much much stronger (it cannot be attacked in the same way as the tiger shape). -author: FCS
Moved groups to the third line. -- HolIgor
A drawback with this shape is that it still leaves a peep at a or b. In many situations, the solid connection (either of the circles) may be better. Also, if White cut in one place, she'd be caught in a shicho. The peeps will also rob Black of eye potential, which may be relevant in other situations. In the example on the left, I think it will be a real struggle for Black to stay alive. DaveSigaty: In the case where there are three black stones as marked the peep will not work. Black has time to answer a peep at d. If there are only two stones, Black must answer the peep by connecting. Similar shapes but a very different result. See also HangingConnection Shape problem for illustration.
SolutionToTrumpetConnectionShapeProblem This is a copy of the living page "Trumpet Connection" at Sensei's Library. (C) the Authors, published under the OpenContent License V1.0. |