The rules, and variations

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The rules, and variations

• There are many variations on the RISK game
• Yours will be compliant to the official 1993
  Parker brother rules.

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Risk The board
Countries
Sea lanes
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The continents
North America
Europe
Asia
Africa
South America
Australia
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Object of the game
To conquer the world by occupying every
territory on the board, thus eliminating all your
opponents
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Game Setup 1

• Number of players agreed. This determines the
  number of starting armies the players have
• A player is randomly selected as the starting
  player
• Starting with that player, and moving round each
  player places 1 army on an empty territory.
• This continues until all the territories have
  been taken

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Game setup 2
Player 1
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Player 2
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Player 3
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Player 4
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Game setup 3
Player 1
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Player 2
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Player 3
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Player 4
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Complete setup
Player 1
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Player 2
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Player 3
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Player 4
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5
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4
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6
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6
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5
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A Player turn

• A player turn has 3 parts
• Get and place new armies
• Attack territories
• Fortify your position

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Getting and placing new armies

• You get
• 1 army per 3 territories you own (round down)
• Armies equal to the value of the continents you
  control.
• Armies gained from trading in Risk cards
• Minimum of 3 armies

• Armies can be placed in any territories that you
  own

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Attacking Territories

• You can perform as many attacks as you wish
  during your turn.
• You can only attack adjacent territories, sea
  lanes make territories adjacent
• You must have at least 2 armies in the territory
  from which you are attacking.
• An attack can only be performed from a single
  territory at a time.

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Example of an attack

• Select a territory to attack from
• And the target

• The yellow player decides to attack the red
  player to the left to take more of Europe

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Resolve attack

• Players decide how many dice to use
• Attack can use up to 3 dice, but must have at
  least one more army in territory than the number
  of dice they use.
• Defender uses up to 2 dice, cannot use more dice
  than they have armies
• The more dice used the greater the chance of
  winning, but the more armies you can potentially
  lose
• Both player roll their dice

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Deciding the battle
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Example of attack, continuation
Yellow player
Red player
Roll 1
10 armies , rolls 3 dice Rolls 4,3,1
4 armies , rolls 2 dice Rolls 4, 2
Roll 2
3 armies , rolls 2 dice Rolls 5, 4
9 armies , rolls 3 dice Rolls 6, 5, 2
Roll 3
1 armies , rolls 1 dice Rolls 6
9 armies , rolls 3 dice Rolls 6, 4, 2
Roll 4
1 armies , rolls 1 dice Rolls 3
8 armies , rolls 3 dice Rolls 4, 2, 2
Yellow wins, with 8 armies remaining
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Capturing territories

• The attack must cease the attack if they have
  just 1 army left
• The attacker can retreat after any set of dice
  have been rolled.
• During the game, every territory must always be
  occupied by at least 1 army.
• If all the defending forces are destroyed then
  the attacker MUST occupy the territory with at
  least as many armies as they rolled dice in your
  last battle. Leaving at least 1 behind in the
  territory they attacked from.

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Example of capture

• Yellow moves a minimum of 3, maximum of 7 of
  their remaining armies into the territory

• Yellow can then attack from this new country, or
  anther that they own

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Ending the attack phase

• A players attack phase ends once they do not wish
  to attack any other territories.
• If they have captured 1 or more territories then
  they get 1 RISK card.

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Fortifying your position

• At the end of your go you can move as many armies
  as you like from ONE of your territories into an
  ADJACENT territory that you own.
• You may do this just ONCE
• Then your go ends, and its the next players
  turn.

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Winning
You win when you own all the territories, and
your opponents have been eliminated This is
called the world domination victory, and is the
default
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RISK Cards

• You get between 0-1 risk card per turn.
• Cards are traded to get extra armies at the
  beginning of your go
• cards are traded in as sets if 3.
• A set consists of all of one type, or 1 of each
  type

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RISK Cards

• The sets return varying numbers of armies,
  depending on how many sets have been traded in
  before

• First set 4 armies
• Second set 6 armies
• Third set 8 armies
• Fourth set 10 armies
• Fifth set 12 armies
• Sixth set 15 armies
• Every set after is worth an extra 5 armies

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Application Programmer Interface (API)

• API contains the model and the application logic
• The GUI simply allows the user to manipulate and
  understand the underlying model.

API
GUI

• The GUI knows about the API, the API does NOT
  know about the GUI

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Text based console version (Week 13)
Just a basic graphic (jpg) NOTHING MORE
API
Commands parsed and interpreted from the command
line interface, then passed to API
Command line interface
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Graphical version (week 23)
Commands passed from the GUI to the API
API
GUI
API notifies interested listeners when the model
has been changed
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How graphical does it have to be?
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AI (Artificial Intelligence)

• You will need to implement computer controlled
  players in your RISK game.
• How do you go about this?
• go to Google and type in Risk board game
  strategy