In Go literature, diagrams are almost always adorned with a few special symbols (markup) such as triangles, alphanumerics etc. This page intends to act as a reference as to when and how to use symbols.
Until now, the use of symbols has been fairly intuitive; re-using symbols for other ends would not give major problems, although some kind of convention already exist.
The material here is a mere condensation of information found on RGG as well as other sources. (Please use the discussion page for comments.)
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- intersection on the goban
- board edges, corners
- white stone
- black stone
- sequence of moves (make sure to state which side is using the odd numbers)
- the compact nature of ASCII diagrams requires to limit to single-digit move numbers; use more diagrams to show longer play sequences.
Following symbols have existed for a while.
- denote playing sequences
- in lowercase, used on empty intersections to show moves in a variation. Japanese go materials would commonly use hiragana or katakana (often in the "i-ro-ha" order).
- used as capital letters, to designate a set of choices from which to continue
- mark a formation/point that is being talked about
- a stone breaking the ladder, a group in danger
- can be used in diagrams to refer to a move that is played on top of an existing stone (see also HowToReadDiagrams)
- indicate an eye
- highlight the last move (mainly used in applications, less in diagrams)
- cGoban2 uses a square to denote a ko
- counting: territory
- mark dead stones
Following symbols are mostly used by applications, but generally not stored in game records.
- used by some applications to denote the status of an intersection (black, white, Dame, undetermined)
Following symbols could become part of the existing set of widely recognised symbols. See discussion page for status.
- blinking or pulsing
- Igowalker has the ability to pulse stones to emphasize them. This allows the stone to be identified even if it already has a number on it.
- semi-transparent stones to denote sibling moves (e.g. GlGo)
- Good move
- Bad move
Sporadicly used annotations (but available in sgf)
- Very good move
- Interesting move
- Doubtful move
- Very bad (losing) move
- '= ='
- Very even position (Joseki)
- Even position
- Unclear position
- '~ ~'
- Very unclear position