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V.A. Numeric Annotation Glyphs (NAG) (source: http://www.chessville.com).
NAG Annotations, By Kelly Atkins
In some PGN files, especially older ones created before the use of Informant symbols became universally common, you occasionally see odd annotations such as $1, $2, $4, and so on. These are NAG's - Numeric Annotation Glyphs. Their purpose is to indicate a common annotation idea with a small symbol instead of a long text explanation. Just as "??" is quicker and easier to write than "Horrible blunder that throws the game away", NAG's serve the same purpose.
The list below will explain the meaning of each NAG symbol and help you understand what the annotator is indicating when you encounter these symbols. For a complete list & definition of the more common Informant annotation symbols, see The Symbols tutorial.
NAG zero is used for a null annotation; it is provided for the convenience of software designers as a placeholder value and is usually not shown in game annotations.
NAG's with values from 1 to 9 annotate the move just played and are equivalent to the more familiar, "!" "?", "!?", etc.
NAG's with values from 10 to 135 are comments about the current position.
NAG's with values from 136 to 139 describe time pressure.
Other NAG values are reserved for future definition.
Note: the number assignments listed below are not etched in stone. It's quite possible, and perhaps even likely, that they will be changed and redefined in the future.
In PGN game scores, each number below would be prefaced with a $ symbol.
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Definition
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0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
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Null Annotation (null move not permitted in pgn notation)
Good move (!)
Poor move (?)
Excellent or brilliant move (!!)
Very poor move/blunder (??)
Speculative move (!?)
Questionable move (?!)
Forced move (all others lose quickly)
Singular move (no reasonable alternatives)
Worst move
Drawish position
Equal chances, quiet position (=)
Equal chances, active position
Unclear position
White has a slight advantage (+=)
Black has a slight advantage (=+)
White has a moderate advantage (+/-)
Black has a moderate advantage (-/+)
White has a decisive advantage (+-)
Black has a decisive advantage (-+)
White has a crushing advantage (+--)
Black has a crushing advantage (--+)
White is in zugzwang
Black is in zugzwang
White has a slight space advantage
Black has a slight space advantage
White has a moderate space advantage
Black has a moderate space advantage
White has a decisive space advantage
Black has a decisive space advantage
White has a slight time (development) advantage
Black has a slight time (development) advantage
White has a moderate time (development) advantage
Black has a moderate time (development) advantage
White has a decisive time (development) advantage
Black has a decisive time (development) advantage
White has the initiative
Black has the initiative
White has a lasting initiative
Black has a lasting initiative
White has the attack
Black has the attack
White has insufficient compensation for material deficit
Black has insufficient compensation for material deficit
White has sufficient compensation for material deficit
Black has sufficient compensation for material deficit
White has more than adequate compensation for material deficit
Black has more than adequate compensation for material deficit
White has a slight center control advantage
Black has a slight center control advantage
White has a moderate center control advantage
Black has a moderate center control advantage
White has a decisive center control advantage
Black has a decisive center control advantage
White has a slight kingside control advantage
Black has a slight kingside control advantage
White has a moderate kingside control advantage
Black has a moderate kingside control advantage
White has a decisive kingside control advantage
Black has a decisive kingside control advantage
White has a slight queenside control advantage
Black has a slight queenside control advantage
White has a moderate queenside control advantage
Black has a moderate queenside control advantage
White has a decisive queenside control advantage
Black has a decisive queenside control advantage
White has a vulnerable first rank
Black has a vulnerable first rank
White has a well-protected first rank
Black has a well-protected first rank
White has a poorly protected king
Black has a poorly protected king
White has a well-protected king
Black has a well-protected king
White has a poorly placed king
Black has a poorly placed king
White has a well-placed king
Black has a well-placed king
White has a very weak pawn structure
Black has a very weak pawn structure
White has a moderately weak pawn structure
Black has a moderately weak pawn structure
White has a moderately strong pawn structure
Black has a moderately strong pawn structure
White has a very strong pawn structure
Black has a very strong pawn structure
White has poor knight placement
Black has poor knight placement
White has good knight placement
Black has good knight placement
White has poor bishop placement
Black has poor bishop placement
White has good bishop placement
Black has good bishop placement
White has poor rook placement
Black has poor rook placement
White has good rook placement
Black has good rook placement
White has poor queen placement
Black has poor queen placement
White has good queen placement
Black has good queen placement
White has poor piece coordination
Black has poor piece coordination
White has good piece coordination
Black has good piece coordination
White has played the opening very poorly
Black has played the opening very poorly
White has played the opening poorly
Black has played the opening poorly
White has played the opening well
Black has played the opening well
White has played the opening very well
Black has played the opening very well
White has played the middlegame very poorly
Black has played the middlegame very poorly
White has played the middlegame poorly
Black has played the middlegame poorly
White has played the middlegame well
Black has played the middlegame well
White has played the middlegame very well
Black has played the middlegame very well
White has played the ending very poorly
Black has played the ending very poorly
White has played the ending poorly
Black has played the ending poorly
White has played the ending well
Black has played the ending well
White has played the ending very well
Black has played the ending very well
White has slight counterplay
Black has slight counterplay
White has moderate counterplay
Black has moderate counterplay
White has decisive counterplay
Black has decisive counterplay
White has moderate time control pressure
Black has moderate time control pressure
White has severe time control pressure
Black has severe time control pressure
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