An SGF file is composed of pairs of properties and property values, each of which describes a feature of the game. A partial list of properties appears below.[1]
AB 	Add Black: locations of Black stones to be placed on the board prior to the first move
AW 	Add White: locations of White stones to be placed on the board prior to the first move.
AN 	Annotations: name of the person commenting the game.
AP 	Application: application that was used to create the SGF file (e.g. CGOban2,...).
B 	a move by Black at the location specified by the property value.
BR 	Black Rank: rank of the Black player.
BT 	Black Team: name of the Black team.
C 	Comment: a comment.
CP 	Copyright: copyright information.
DT 	Date: date of the game.
EV 	Event: name of the event (e.g. 58th Honinbō Title Match).
FF 	File format: version of SGF specification governing this SGF file.
GM 	Game: type of game represented by this SGF file. A property value of 1 refers to Go.
GN 	Game Name: name of the game record.
HA 	Handicap: the number of handicap stones given to Black. Placement of the handicap stones are set using the AB property.
KM 	Komi: komi.
ON 	Opening: information about the opening (Fuseki), rarely used in any file.
OT 	Overtime: overtime system.
PB 	Black Name: name of the black player.
PC 	Place: place where the game was played (e.g.: Tokyo).
PL 	Player: color of player to start.
PW 	White Name: name of the white player.
RE 	Result: result, usually in the format "B+R" (Black wins by resign) or "B+3.5" (black wins by 3.5).
RO 	Round: round (e.g.: 5th game).
RU 	Rules: ruleset (e.g.: Japanese).
SO 	Source: source of the SGF file.
SZ 	Size: size of the board, non-square boards are supported.
TM 	Time limit: time limit in seconds.
US 	User: name of the person who created the SGF file.
W 	a move by White at the location specified by the property value.
WR 	White Rank: rank of the White player.
WT 	White Team: name of the White team.