Bill Spight initiated a classification of moves by their immediate vicinity, as shown in the following diagram.
There are 21 such basic patterns, which I propose to call spightonians (スパイトニャン). Some of them are very useful.
15 spightonians either have traditional names themselves, or contain subclasses with traditional names. This page is a field guide with which the reader can find these names. The classes are arranged by the number of enemy stones and then by the number of friendly stones the move touches. See also /conventions. (This page is not intended as a complete list of spightonians.)
|Table of contents||Table of diagrams
The 4 immediate neighbours
Kado or Kata
The general wedge
(no white stones in contact with stones)
The untouched move is the ancestor of a prolific family of subclasses, distinguished by their more distant neighbours. Unfortunately, because of this dependence on context it does not lend itself to general tactical considerations.
Three subclasses are of particular importance: Open moves with no stones on the diagonals, kosumi with one friend on a diagonal and the strike with only enemies on the diagonals.
kosumi (コスミ) - diagonal move
- hazama (間) - a stone played in a diagonal gap
- magari (曲がり) - turning move
- hiki (引き) - drawing back
- narabi (並び) (when no enemies are touching the existing friend)
This move makes most sense if the two stones straddle an enemy stone at a, in which case it is called kata-tsugi (堅ツギ) - solid connection. If a empty this move is an empty triangle. If a empty and there are 2 enemy stones at b this move can be guzumi.
botsugi (棒ツギ) - pillar not a very useful move in most circumstances.
This unfortunate situation occurs when you need to connect one of the stones with a living group.
This is a useful Spightonian, but not as useful as the next one. See the touch.
- hane (綽)
- tsuke (ツケ) the attachment
- hasami tsuke (挟みツケ) - clamp (if there is a friend at SS.
- hara-zuke (腹ツケ) - attachment at the belly of a group.
- kosumi tsuke (コスミツケ)
This is the most useful Spightonian. See tap.
Subclasses: (The distinction between the first three depends on other context.)
- osae - block (If all diagonals are empty or there is a white stone at the SW diagonal.)
- oshi (押し) - Push (If all diagonals are empty.)
- hai (這い) - the Crawl
- magari (曲がり) - the Turn（If the SW diagonal is a friend）
This is an ideal situation that rarely happens in real life.
Sashikomi (差し込み) - thrusting in
This move is only possible when taking a group of enemy stones.
Created: Sebastian, 2004-11-27