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[pbmserv] New game: Fire and Ice



A new game Fire and Ice has been added to the server.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Help For the Game Of Fire and Ice

Introduction

   Welcome to the network server for Fire and Ice, the abstract board
   game by Jens-Peter Schliemann published by Pin International. The Fire
   and Ice challenge command starts a new game between userid1 and
   userid2 as follows:

fireandice challenge [-handicap=number] userid1 userid2

   The -handicap parameter sets the number of handicap pieces (range
   1..6). Fire always starts with at least one piece, but may also start
   with up to six additional pieces randomly added to separate islands.

Other commands are the same as for all pbmserv games.

Board Layout

   The Fire and Ice board consists of a system of seven triangular
   islands. Each island has seven positions marked '-' in a similar
   triangular layout. Two players, Fire and Ice, compete to control three
   islands forming a line or circle.

     FIRE (#): 24            _           ICE (O): 25
                            / \
                           / - \
                          /     \
         A               / -   - \             1
                        /    -    \
       B   C           / -   -   - \         2   3
         D             \___________/           4
     E   F   G        .      .      .      5   6   7
                     .       .       .
                   _.    . . . . .    ._
                  / \  .     .     .  / \
                 / - \.      .      ./ - \
                /     \      _      /     \
               / -   - \    / \    / -   - \
              /    -    \  / - \  /    -    \
             / -   -   - \/     \/ -   -   - \
             \___________/ -   - \___________/
             .   .      /    #    \      .   .
            .    .     / -   -   - \     .    .
          _.      .  . \___________/ .  .      ._
         / \       .        / \        .       / \
        / - \    .  .      / - \      .  .    / - \
       /     \ .      .   /     \   .      . /     \
      / -   - \         ./ -   - \.         / -   - \
     /    -    \        /    -    \        /    -    \
    / -   -   - \. . . / -   -   - \ . . ./ -   -   - \
    \___________/      \___________/      \___________/

   The islands are labelled A, B, C, D, E, F and G according to the key
   at the top left of the board. Similarly, the positions within each
   island are labelled 1, 2, 3, 4, 5, 6 and 7 according to the key at the
   top right. Every board point can therefore be described by island and
   position, for instance the central position of the central island is
   D4, the top position of the righmost island is G1, etc.

Rules

   Each player has 25 pieces of their type. Fire (#) starts with a single
   # piece at the central position D4 and moves first.

   Players alternate taking turns. Each turn the current player must move
   one of their pieces either:
     a) to another position on the same island, or
     b) to the same position on another island.

   In both cases the destination point must be empty. Once the piece is
   moved, an opponent's piece is automatically added to the position just
   vacated.

   A player controls an island by forming a line or ring of three of
   their pieces upon it. For instance, the following examples show the
   seven possible ways in which Fire may control an island:
          _                  _                  _
         / \                / \                / \
        / # \              / # \              / - \
       /     \            /     \            /     \       Line from corner
      / #   - \          / -   # \          / -   - \         to corner.
     /    -    \        /    -    \        /    -    \
    / #   -   - \      / -   -   # \      / #   #   # \
    \___________/      \___________/      \___________/

          _                  _                  _
         / \                / \                / \
        / # \              / - \              / - \
       /     \            /     \            /     \       Line from corner
      / -   - \          / -   # \          / #   - \         to edge.
     /    #    \        /    #    \        /    #    \
    / -   #   - \      / #   -   - \      / -   -   # \
    \___________/      \___________/      \___________/
                             _
                            / \
                           / - \
                          /     \
                         / #   # \    <--- These pieces
                        /    -    \        form a ring.
                       / -   #   - \
                       \___________/

   Each of these islands is controlled by Fire regardless of whether the
   unused positions are empty or occupied by either player. It's not
   possible for more than one player to control an island at any time.

   The game is won by the first payer to form a similar line or ring of
   three islands under their control.

Sample Game

   The following example shows a game won by Ice (O) who controls three
   islands in a line (A, C and G). Ice also controls the central island D
   but this is not relevant to the win.
     FIRE (#):  4            _           ICE (O):  5
                            / \
                           / O \
                          /     \
         A               / O   O \             1
                        /    #    \
       B   C           / O   #   O \         2   3
         D             \___________/           4
     E   F   G        .      .      .      5   6   7
                     .       .       .
                   _.    . . . . .    ._
                  / \  .     .     .  / \
                 / # \.      .      ./ # \
                /     \      _      /     \
               / #   # \    / \    / O   O \
              /    O    \  / - \  /    #    \
             / O   #   - \/     \/ #   O   # \
             \___________/ #   O \___________/
             .   .      /    O    \      .   .
            .    .     / O   -   - \     .    .
          _.      .  . \___________/ .  .      ._
         / \       .        / \        .       / \
        / O \    .  .      / # \      .  .    / - \
       /     \ .      .   /     \   .      . /     \
      / O   - \         ./ #   # \.         / #   # \
     /    -    \        /    O    \        /    #    \
    / #   #   # \. . . / -   O   # \ . . ./ O   O   O \
    \___________/      \___________/      \___________/

General Tips

   The following points summarise strategies and tactics from the
   official Fire and Ice rules page:
   http://www.otb-games.com/fireandice/rules.html
   As soon as a player controls an island they can safely move additional
   pieces off it, as only one player can control an island at a time.

   Critical islands are usually those at the intersection of lines
   extending from the pairs of islands most strongly held by both
   players.

   It is often prudent to concede a disputed island and concentrate your
   efforts elsewhere if the opponent holds the majority of positions upon
   it.

Each game consists of between 9 and 24 moves per player.

   The triangular pattern of seven points which connect into triplets in
   seven ways is a mathematical construct called the Fano Plane, which is
   a finite projective plane of order two.

Move Syntax

Fire (#) moves first. The move syntax is:

fireandice move board# userid password coords

Where coords are of the form:

       F6-C6   Move a piece from position 6 on island F to position 6 on
   island C.

   F6 must be occupied by the current player and C6 must be empty. An
   opponent's piece will automatically be added to F6 after the move.

Other commands are the same as for all pbmserv games.

History

   Fire and Ice rules and design by Jens-Peter Schliemann. The game is
   copyright Pin International and distributed by Out of the Box
   Publishing, who would like to point out that copying for commercial
   purposes is forbidden.

   Further details of the game including its history, variants and
   additional tips on strategy may be found at Out of the Box's "Fire and
   Ice" page: http://www.otb-games.com/fireandice/

Implementation and help file by Cameron Browne, November 2003.