The upper left corner as origin of the board corresponds to the way most modern computers represent screen coordinates to simplify integration of text and graphics.
Two lower-case letters in the range "a"-"s" were used instead, for reasons of simplicity and compactness. The author intentionally broke with the tradition of labeling moves (and points) with letters "A"-"T" (excluding "i") and numbers 1-19. The upper left part of the board is used for smaller boards, e.g. The first letter designates the column (left to right), the second the row (top to bottom). This notation stems from Newick format.Ĭoordinate system for points and moves The first branch (variation A) is the main branch.
Variations are nested in brackets, and also usually assigned letters. There is no strict checking of the contents of these tags, so it is possible to put any text into the result tag for example. User: name of the person who created the SGF file.Ī move by White at the location specified by the property value. Size: size of the board, non-square boards are supported. Result: result, usually in the format "B+R" (Black wins by resign) or "B+3.5" (black wins by 3.5). Place: place where the game was played (e.g.: Tokyo). Opening: information about the opening ( Fuseki), rarely used in any file. Placement of the handicap stones are set using the AB property.
Handicap: the number of handicap stones given to Black. Game: type of game represented by this SGF file. 58th Honinbō Title Match).įile format: version of SGF specification governing this SGF file. CGOban2.).Ī move by Black at the location specified by the property value.Įvent: name of the event (e.g. ABĪdd Black: locations of Black stones to be placed on the board prior to the first moveĪdd White: locations of White stones to be placed on the board prior to the first move.Īnnotations: name of the person commenting the game.Īpplication: application that was used to create the SGF file (e.g. A partial list of properties appears below. Most Internet Go servers and Go software from 1990 support this format.Īn SGF file is composed of pairs of properties and property values, each of which describes a feature of the game. Games stored in SGF format can easily be emailed, posted or processed with text-based tools. It is also text-based instead of binary for the sake of portability. The tree structure makes the addition of variations simple. The main purposes of SGF are to store records of played games and to provide features for storing annotated and analyzed games (e.g. SGF was originally created under a different name by Anders Kierulf for his SmartGO program.
Go is the game that is most commonly represented in this format and is the default. The Smart Game Format ( SGF) is a computer file format used for storing records of board games.
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