Solid Connection / More specific definition

Table of contents Japanese Terms Criteria 1 Criteria 2

Table of diagrams Exa. 1 Exa. 2 Exa. 3 Exa. 4 Exa. 5 Exa. 6 Dia. 6A Counter-exa. 7 Counter-exa. 8 Counter-exa. 9 Counter-exa. 10 Counter-exa. 11 Counter-exa. 12

Japanese Terms

The article solid connection defines it as "a connecting technique that joins previously cuttable stones to each other so that there is no gap between them. Because all the stones now belong to the same chain, the stones connected this way can never be separated from each other again." In Japanese practice, there are finer distinctions. Some of the Japanese terms used for solid connections include the following:

• Kadotsugi (angle-point connection,
• katatsugi (solid connection),
• gatchiritsugi (tight connection) and
• boutsugi (pole connection).

These meet certain criteria laid out below.

By contrast, the specific types of looser connection are:

• Kaketsugi (hanging connection)
• Keimatsugi (knight's move connection)
• Takefu (bamboo joint), aka nichoutsugi (doubled connection),
• soukan (double one-point jump)
• Ryoutsugi (double connection)
• Kanetsugi (double-purpose connection)
• Sagaritsugi (connection with a descending move)
• Kamaetsugi (constructive connection)

Criteria 1

Common criteria for the solid connections listed in the first set of bullets above:

• It is a string connection that is
• a thick cut protection,
• connects exactly two strings not in atari and
• then blocks opposing stones.

As a thick cut protection, these characteristica apply:

• the stones are connected and
• prevent against an opposing cut and
• they make thick shape.

As thick shape, also these additional characteristica apply:

• little or no aji is left behind and
• the opponent cannot capture and
• the opponent cannot play painful forcing moves against the shape.

This differs in the folliwing way from the current definition of solid connection, as cited above:

• exactly two strings,
• the strings are not in atari,
• block opposing stones,
• make thick shape,
• little or no aji is left behind,
• the opponent cannot capture,
• the opponent cannot play painful forcing moves against the shape.

As a consequence, the following examples are "solid connections" according to the current parent page's description but not "solid connections" according to the the more specific definition on this page:

 

 

 

 

By contrast, the more specific definition allows only such kinds of moves:

 

 

[edit]

Criteria 2

There are these two major meanings for solid connection:

• A solid connection is a string connection, makes thick shape and protects against an opposing cut created after 1 or 2 successive plays.
• A solid connection is a string connection.

Here are examples for the first meaning:

Exa. 1  

Exa. 2  

Exa. 3  

Exa. 4  

Exa. 5  

Exa. 6  

Dia. 6A  

The opponent White could cut by 2 successive plays. This fulfils the cut condition of the definition. So we have a solid connection here.

Now some counter-examples follow:

Counter-exa. 7  

This is not a solid connection because it does not protect against a previously possible opposing cut.

Counter-exa. 8  

This is not a solid connection because it does not create thick shape.

Counter-exa. 9  

This is not a solid connection, e.g., because the opponent can capture the created string and therefore it is not thick shape.

Counter-exa. 10  

As before.

Counter-exa. 11  

This is not a solid connection because the opponent threatens a capture but does not threaten a cut.

Counter-exa. 12  

This is not a solid connection because the opponent does not threaten a cut.