[pbmserv] scramble -tournament

[John Williams <williams@tni.com>]

I have added a new playing mode -tournament to scramble, which makes
challenges a part of the game.  Here are the relevent additions to the
help page.  ~ sharkey


parameters:

-tournament
    Tournament mode is an alternative to Strict or -nostrict. When playing
in tournament mode, you are not told whether the words you play are in the
dictionary or not. You may then use the "challenge" command to check
whether the word(s) your opponent just played were valid or not. See the
Adjudication and Challenges section for details on the "challenge"
command. Tournament mode is limited to 2 players.


ADJUDICATION AND CHALLENGES

In strict mode (the default), no invalid words are allowed, and the game
will return a move with invalid words as an error.

In -nostrict mode, words that do not appear in the dictionary will be
flagged as such, and another player may choose to request an undo. If the
player who just played realizes they made a word in error, they may also
request an undo. The game does not enforce that every word created is in
the dictionary, but all players are informed of the words that do not
appear.

In -tournament mode, the players are not told whether the words are in the
dictionary or not. Players may use the "challenge" command to check
whether the word(s) just played by his opponent are valid. The "challenge"
command may only be used in tournament mode.

When a "challenge" command is issued, all words made on the immediately
preceeding turn are check against the dictionary. If all the words are in
the dictionary, the challenge fails. The challenger scores zero points for
his turn, and his turn is over. If any of the words are not in the
dictionary, the challenge succeeds. All tiles played on the preceeding
turn are removed from the board and placed back in the opponent's rack,
and no points are scored for any of those words. It is then the
challenger's turn to play a word. In keeping with tournament rules, you
are not told which word(s) are invalid, only that at least one was not in
the dictionary.

NOTE: Because a challenge may result in tiles being returned to a rack, in
tournament mode new tiles are not drawn until the beginning of your turn.
This give your opponent time to issue a challenge on their turn. Although
this means you cannot use your opponent's time to plan your move as well,
this is not a serious hardship because of the long time limits in email
play.