The rules of RISK

1. The rules of RISK Simon Forey Java Risk game

2. The rules, and variations • There are many variations on the RISK game • Yours will be compliant to the official 1993 Parker brother rules. Java Risk game

3. Risk: The board Countries Sea lanes Java Risk game

4. The continents North America Europe Asia Africa South America Australia Java Risk game

5. Object of the game “To conquer the world by occupying every territory on the board, thus eliminating all your opponents” Java Risk game

6. 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 Java Risk game

7. Game setup 2 Player 1 1 Player 2 1 Player 3 1 Player 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Java Risk game

8. Game setup 3 Player 1 1 Player 2 1 Player 3 1 Player 4 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 Java Risk game

9. Complete setup Player 1 1 Player 2 1 Player 3 1 Player 4 1 5 1 1 6 1 1 4 5 3 4 4 3 2 1 1 3 2 1 8 1 3 1 6 5 2 5 4 6 3 6 1 4 7 1 1 1 1 1 5 1 1 Java Risk game

10. A Player turn • A player turn has 3 parts: • Get and place new armies • Attack territories • Fortify your position Java Risk game

11. Getting and placing new armies Australia – 2 South America –2 North America – 5 Asia – 7 Europe – 5 Africa - 3 • 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 Java Risk game

12. 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. Java Risk game

13. 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 Java Risk game

14. 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 Java Risk game

15. Deciding the battle Java Risk game

16. 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 3 armies , rolls 2 dice Rolls 5, 4 Roll 2 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 Java Risk game

17. 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. Java Risk game

18. 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 Java Risk game

19. 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. Java Risk game

20. 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 it’s the next players turn. Java Risk game

21. 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 Java Risk game

22. 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 Java Risk game

23. 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 Java Risk game

24. Building a JAVA version of RISK Simon Forey Java Risk game

25. 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 Java Risk game

26. 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 Java Risk game

27. Graphical version (week 23) Commands passed from the GUI to the API API GUI API notifies interested listeners when the model has been changed Java Risk game

28. How graphical does it have to be? Java Risk game

29. 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’ Java Risk game