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Parabola
   

[Diagram]
The parabola

This black configuration can be seen as a parabola. The marked black stone is at the mathematical focal point of the parabola. The White marked stone is almost invariably present (see it as part of some white configuration). This shape focuses more on eyeshape than on connection. However, ...


[Diagram]
The parabola

... often the parabola appears due to the net created by B1. Because this captures the marked stone, the shape now also meets the objective of connecting Black's two strings. So the presence of the marked cutting stone changes the meaning of the shape. As a consequence ...


[Diagram]
Eye-stealing

... this is known as the eye stealing tesuji, whereas ...


[Diagram]
Cut

This is known as a severe cutting manoeuver.


Dieter



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