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elementary moves 2
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  Difficulty: Beginner   Keywords: Go term

How Moves relate to Friendly and Hostile Stones

These moves aren't as elementary as the move at elementary moves 1. On a scale from elementary to compound, however, they are much closer to the simple side than e.g. a snapback, throw-in, nakade plays or crane's nest tesuji [01].

Moves close to both one enemy stone and one friendly stone

There are three relations to be considered:

  1. the relation between the two stones already on the board
  2. the relation to the hostile stone
  3. the relation to the friendly stone

After a tsuke

If the start position is caused by a (black or white) tsuke, the moves closest to both are hane and nobi, the moves closest to just one of them are clamp and hiki

[Diagram]
Tsuke - Black to move


[11] ハネ Hane

[Diagram]
Hane

A move in direct contact with an enemy stone and in (just) diagonal friendly contact.

  1. There is death in the hane
  2. Hane at the head of two
  3. Respond to attachment with hane


[12] ノビ Nobi

[Diagram]
Nobi

A stretch in diagonal contact with an enemy stone and in direct contact with a friendly stone.

It strengthens the friendly stone by adding two liberties, and gives it direction. While it does not directly take away a liberty of the enemy stone, it obstructs a direction of development.


[13] Clamp

[Diagram]
Clamp

A move in second direct contact with an enemy stone on the other side of the enemy stone.

By reducing the number of liberties to two, it puts pressure on the hostile stone to choose direction.

[14] Hiki

[Diagram]
Hiki

A move in direct contact with a friendly stone is that touches an enemy stone on the other side of the friendly stone. By adding two liberties it strengthens the friendly stone.

It is only played when there are other enemy stones in the immediate vicinity (... as far as I could find in [ext] gobase, though I'm not yet good at using that. To me (16 kyu) this makes sense. Any counter-example or confirmation would be very welcome. -- mAsterdam.)

After other moves

Though both push and bump combine a nobi from the friendly stone and a tsuke on the hostile stone, they are not called nobi-tsuke[02].

[21] Push

[Diagram]
Push

A move in direct contact with both an enemy stone and a friendly stone on different lines.



[31] Tsukiatari or bump

[Diagram]
Bump

A move in direct contact with both an enemy stone and a friendly stone on the same line. Black bumps into the white stone.

  • Typical use:



[41] Kosumi-tsuke

[Diagram]
Kosumi-tsuke

Another move in direct contact with an enemy stone and in (just) diagonal friendly contact. This time the hostile stone is at keima. This combination of kosumi and tsuke in one move is called kosumi-tsuke[03].


footnotes

[01] Discussion moved from Messages.

mAsterdam: I am hitting the wall of my ignorance in trying to make a shape-based catalog of basically generic moves/properties. Generic in the sense that there is basically no context?, so no defining direction, extension, shimari or kakari. Of course a property of a move can be that it occurs frequently in a specific context.

One question I had (and answered my way - but maybe there are other considerations) is ''Where should elementary stop?" "Elementary" here should mean one stone in relation to one other. So I think elementary moves already contains moves it shouldn't: Push, bump, etc..., but that brings me to the next question.

What to call the (class of) more complex moves?

They are not really complex, just not elementary. I thought about "compound", because there are more relevant relations (at least three) but did not like that because it does not respect the notion that there is just one field of tensions defining the moves.

Thoughts? Suggestions?

Charles I think go encourages multiple approaches, and supports the idea that any one formal classification is too limited. "Take the cream from the top of the milk."

mAsterdam: Heh. I could have said that myself. However, I find that I am still far from the limit of this formal classification. I could still continue with Type 1, Type 2 etc, like Richard Hunter in his classification of semeai in Richard Bozulich's second book of go. Ugly, but if I can't find a more meaningful set of names I will do just that.

[02] Neither are they called tsuke-nobi, the term tsuke-nobi is used for a sequence of tsuke, hane and nobi.

[03] Both hane and kosumi-tsuke combine a kosumi (friendly) and a tsuke (hostile), but the hane is not called kosumi-tsuke[03]. Language is as language does. See also Japlish.


mAsterdam



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