That's, what I've found out:
First, both of the players must accept the Crawford-Rule. This is done by the toggle command:
NAME
 toggle-crawford
VALUES
 YES: You insist on using the Crawford rule.
 NO: You would like to play without it if your opponent agrees.
DEFAULT
 YES
SEE ALSO
 crawford
Second, the rawboard-command:
NAME
 rawboard - how to interpret the raw board output
DESCRIPTION
 If the rawboard toggle is set to yes you won't see the text representation
 of the board but a number of tokens separated by colons. The tokens sent
 by the server and their meaning are (the first token is always the
 word 'board'): (tokens marked with + are new)
+ name    - the player's name
 name    - the opponent's name
 match length - match length or 9999 for unlimited matches
 player got - player's points in the match so far
 opponent got - opponent's points in the match so far
 board    - 26 numbers giving the board. Positions 0 and 25 represent
        the bars for the players (see below). Positive numbers
        represent O's pieces negative numbers represent X's pieces
 turn    - -1 if it's X's turn, +1 if it's O's turn
        0 if the game is over
 dice    - 2 numbers giving the player's dice. If it's the players
        turn and she or he hasn't rolled, yet both numbers are 0
+ dice    - the opponent's dice (2 numbers)
 cube    - the number on the doubling cube
 may double - 1 if player is allowed to double, 0 otherwise
+ may double - the same for the opponent
 was doubled - 1 if your opponent has just doubled, 0 otherwise
 color    - -1 if you are X, +1 if you are O
 direction  - -1 if you play from position 24 to position 1
        +1 if you play from position 1 to position 24
 home    - 0 or 25 depending on direction (obsolete but included anyway)
 bar     - 25 or 0 (see home)
 on home   - number of pieces already removed from the board by player
+ on home   - same for opponent
 on bar   - number of player's pieces on the bar
+ on bar   - same for opponent
        can move. This token is valid if it's your turn and you
        have already rolled.
 did crawford - don't use this token
+ redoubles  - maximum number of instant redoubles in unlimited matches
SEE ALSO
 board, boardstyle
Hmm. Why that "
did crawford - don't use this token"?
With this information, I think, you can see, if it's the Crawford game:
- if both players have toggle crawford yes
- if one of the players have a matchscore of (matchlen-1)
- if both players cannot double (rawbord maydouble = 0)
- if the cube value is 1
Is that the solution?
Greetings
amarganth
