Double threat

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  Difficulty: Intermediate   Keywords: Tesuji

The kind of double threat that we consider here occurs when a move threatens two different follow-up moves in such a way that the opponent cannot prevent both of them. These two follow-up moves are said to be miai. A double peep is a classic example of a double threat. Another example is double atari. Double ladder breakers are also another example of a double threat.

Another kind of double threat is when a play on a particular point of the board is a threat both when this point is played by Black and by White. E.g. a double ko threat.

Examples

[Diagram]

Destroying eye space

White plays W1. This move threatens to connect to both the left and the right and is therefore very effective to destroy Black's eye space.


[Diagram]

B2 is a double threat

This example comes from [ext] this commentary on a game from the 51st Oza tournament between Kato Masao (White) and Lin HaiFeng. Kato did not play W1, which would allow the double threat of B2. B2 threatens both a and b, which are miai.


Exercise

[Diagram]

Black to play

Black to play an effective double threat.

Solution.


Examples contributed by: Bill, Chris and Unkx80.


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This is a copy of the living page "Double threat" at Sensei's Library.
(OC) 2011 the Authors, published under the OpenContent License V1.0.
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