[pbmserv] New game: Trichet

[Cameron Browne <cameron.browne@btinternet.com>]

Hi,

A new game Trichet has been added to the server. 
This is tile placement game of territory 
enclosure played with triangular Truchet-like tiles.

Official rules:   http://www.cameronius.com/games/trichet/
PBeM help page:   http://www.gamerz.net/pbmserv/trichet.html
Graphical web UI: http://www.gamerz.net/pbmserv/List.php?Trichet

To test it out:

  trichet challenge <you> camb

Cameron

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Help for the Game of Trichet

   Welcome to the network Trichet server. The challenge command is described
   here. Other commands are the same as for all pbmserv games.

     trichet challenge [-size=n] userid1 userid2

   Starts a new game for two players.

   The -size option specifies the available number of tiles (default 54).

  Introduction

   Trichet is a tile placement game of territory closure for two players.

  Rules

   Equipment: Two players, Oh and Dot, share a common pool of 54 triangular
   Trichet tiles. Each side of each tile has a 1/6 arc dividing the tile into
   two regions, marked 'o' and '.'.

       +            +
      ooo          /.\
     ooooo        /...\
    /.....\      ooooooo
   +-------+    +ooooooo+

     Front         Back

   Start: Oh starts by placing two tiles in the middle of the playing area as
   shown:

       +
      ooo
     ooooo
    /.....\
   +-------+
    \...../
     ooooo
      ooo
       +

   Play: Players then take turns adding a tile of their choice to touch at
   least one edge or corner of an existing tile such that all neighbouring
   regions match in colour.

   Auto Moves: Each move may result in one or more positions at which only one
   tile  in  one rotation may be placed such that colours match; all such
   positions are automatically made as part of 
the the move. Each auto move may
   result in additional auto moves, hence each player move will usually result
   in multiple tile placements.

   For example, the move shown below creates two positions 'p' and 'q' (left)
   which only have one valid placement each, which are automatically made
   (centre). Placement 'p' then creates position 'r' which has only one valid
   placement, which is also automatically made to complete the move (right).

                                                                    +
                                                                   /.\
                                          r                       /...\
                                                                 ooooooo
    +       +                 +ooooooo+ooo----+         +ooooooo+ooo----+
   ooo  p  ooo  q            ooooooooooooo.../         ooooooooooooo.../
  ooooo   /.ooo             ooooo.../.ooooo./         ooooo.../.ooooo./
 /.....\ /...ooo           /.....\./...ooo./         /.....\./...ooooo
+-------+----ooo+   -->   +-------+----ooo+   -->   +-------+----ooo+
 \...../                   \...../                   \...../
  ooooo                     ooooo                     ooooo
   ooo                       ooo                       ooo
    +                         +                         +

   Aim: A player wins by completing surrounding a region of their colour. For
   example, Dot wins the following game:

                             +
                            /.\
                           /...\
                          ooooooo
                 +----ooo+ooooooo+ooo----+
                /.\...ooooooooooooooo.../
               /...\.ooooo.\.../.ooooo./
              ooooooooooo...\./...ooooo
     +----ooo+ooooooo+ooo----+----ooo+
      \...ooooooooooooooo.../.\...ooooo
       \.ooooo.\...ooooo.../...o.ooooo.\
        ooooo...\./.....\./...ooooooo...\
         +ooo----+-------+----ooo+ooo----+
        ooooo.../.\...../.\...ooooooo.../.\
       /.ooooo./...ooooo...\.ooooo.o.../...o
      /...ooooooooooooooooooooooo...\./...ooo
     +----ooo+ooooooo+ooooooo+ooo----+----ooo+
              ooooooooooooooo
               \...ooooo.../
                \./.....\./
                 +-------+
                  \...../
                   ooooo
                    ooo
                     +

   If a move surrounds regions of both colours then the mover loses. If the
   tiles run out before either player encloses a region then the game is tied.

  Notes

   The default number of tiles is 54 as this number allows all tiles to be
   placed within a hexagonal shape according to the formula f(n) = 6*n*n.

  Syntax

   The following command plays tile rotation 'd' at position 3, in addition to
   any resulting auto moves:

     trichet move <game#> <userid> <passwd> d3

  History

   Trichet tiles and rules by Cameron Browne and 
copyright © Cyberite Ltd 2008.

   The name Trichet refers to the game's origins as a form of triangular
   Truchet-like tiles.

   Graphical web interface: http://www.gamerz.net/pbmserv/List.php?Trichet

   More details are available at the official Trichet page.

   Implementation and Help file by Cameron Browne, December 2008.