Coordinate system for points and moves
`a' is the 1 point for white (and the 24 point for black), through to `x' which is the 24 point for white (and the 1 point for black). `y' is the bar, and `z' is the bearoff tray.
Other legal moves include `double', `take' and `drop' for cube action (where `double' includes initial and subsequent doubles, as well as beavers).
Examples of legal moves include:
White = O = 0 Black = X = 1
Property: CO Propvalue: simpletext Propertytype: setup Function: Set the position of the doubling cube. The value should be `b' (black), `w' (white), `c' (centred), or `n' (none -- for cubeless or Crawford games). Related: CV Property: CV Propvalue: number Propertytype: setup Function: Set the value of the doubling cube. This value defaults to 1 at the beginning of the game, but a CV property should be added when setting up a position where a double has been made, or at the beginning of a money game if automatic doubles occur. Related: CO Property: DI Propvalue: number Propertytype: setup Function: Set the dice without moving (this could be useful for creating problem positions, e.g. DI) Related: CO Property: MI Propvalue: list of composed simpletext ':' simpletext Propertytype: game-info Function: Specifies information about the match the game belongs to. This property should specify a list of tag/value pairs, where the allowable tags are case-insensitive, and include: length - the match length (number of points); value should be a number game - the number of this game within the match (the first game is 1); value should be a number bs - the score for Black at the start of the game; value should be a number ws - the score for White at the start of the game; value should be a number Unknown tags should be ignored (a warning may be produced). The order of tags in the list is not significant. An example MI property is: MI[length:7][game:3][ws:2][bs:1] Related: EV, GN, RE, RO Property: RE Propvalue: simpletext Propertytype: game-info Function: The general RE property has the following modification in backgammon games: in the case of a resignation, the value should also specify the number of points before the R(esign). Here are three example RE properties: RE[B+6R] -- White resigns a backgammon on a 2 cube (worth 6 points). RE[W+2Resign] -- Black resigns a gammon on a 1 cube (worth 2 points). RE[W+4] -- Black drops a redouble to 8 (note this is considered a normal loss, not a resignation). Related: RE Property: RU Propvalue: simpletext Propertytype: game-info Function: Backgammon-specific values for the general RU property include the following: [Crawford] -- the Crawford rule is being used in this match, although this is not the Crawford game. [Crawford:CrawfordGame] -- this IS the Crawford game. [Jacoby] -- the Jacoby rule is in use for this game. Related: RU