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Play on the Point of Symmetry
Path: GoProverbs   · Prev:   · Next: BewareOfGoingBackToPatchUp
    Keywords: Proverb

In a symmetrical position, there is a play on the point of symmetry.

Many symmetrical positions have asymmetrical solutions, so this proverb should only be taken as a suggestion for where to look. A straightforward translation of the proverb:

  When right and left have the same shape, there is a play in the center.

This Go proverb applies to tactical questions regarding life and death of groups, but also sometimes to more strategic questions regarding invasions/reductions.


[Diagram]
Black to play and live.

In the example, Black can keep the group alive in seki by playing on the point of symmetry as shown in the following diagram.


[Diagram]
Black plays on the point of symmetry.

Of course, sometimes (as in this example) there is more than one point of symmetry - but the proverb will at least reduce your options.


[Diagram]
Black plays on the point of symmetry again.

A possible variation is White playing at W2. Then in this case, Black can apply the same proverb again, by playing at B3. Then a and b are miai, and c and d are also miai, so Black lives with two eyes.


[Diagram]
Still alive.

In this way, Black is still alive.


[Diagram]
Wrong point of symmetry.

However, if Black plays at the wrong point of symmetry at B1 or a, then White W2 to W6 kills the Black group.




Dnerra: Sometimes, it also applies to the opening:

[Diagram]
Where else would you like to move?


Dave Well, Dnerra, . . .

[Diagram]
Cho Chikun - Rin Kaiho 1991-06-13

[Diagram]
Cho Chikun - Takemiya Masaki 1990-03-28

[Diagram]
Kato Masao - Yuki Satoshi 1995-04-20


See also

Exceptions

  • Consideration of number of liberties can outweigh the proverb


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This is a copy of the living page "Play on the Point of Symmetry" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.