# Rules of the game

### Basic 24

#### Summary

Four cards (between 1 and 10) are placed on the table. Using each number (card) exactly once, basic operations (+,-,*,/) and parentheses, the players attempts to make 24. Whoever gets it first gets a point and the next round begins!

#### Long Description

Each round, four numbers are shown to all players. The players must formulate an expression which uses each number exactly once. The expression may contain +,-,*,/ and parenthesis. The expression must evaluate to 24. The round ends when one player submits a solution (an expression). If the solution is correct, that player gets 1 point. If the solution is incorrect, that player loses a point. Then the next round begins. The first player who reaches 10 points wins the game.

#### Impossible

Sometimes, one of the set has no valid solution (expression). In this case, a player may click Impossible. If all players have clicked Impossible in a round, the round is a draw, there are no changes in the points and the next round starts.

#### Settings

Here are the setting for creating a basic 24 game:

# Players: 2
Target #: 24
# Numbers: 4
# Sets: 1
Number range: 10
Game type: 0
End score: 10
Round time: 0
Between time: -1

### Classic variant

The following section describe game types 0,1 and 2.

#### Rules

# Sets sets are shown at a time. A set consists of # Numbers numbers. The numbers range from 1 to Number range. For each set, the players must use each number in that set exactly once to make (write an expression evaluating to) Target # (using +,-,*,/). The solution for the sets must be written in order, each separated by a space. The round ends when a player gives an answer. If the expression(s) given by that player is correct for all sets, that player gets 1 point. Otherwise, that player loses a point. The first player to reach End score points wins the game.

#### Impossible

Sometimes, one of the set has no valid solution (expression). In this case, a player may click Impossible. If all players have clicked Impossible in a round, the round is a draw, there are no changes in the points and the next round starts.

#### Variations

Game mode 0 is the set of rules described above.
Game mode 1 is the same as above but the game never ends (good for 1 player practice).
In game mode 2, only the sets that have a solution are given to the players (ie: no impossible sets).

### Tony Four

The following section describes game modes 10,11 and 12.

#### Summary

Players are shown many sets of cards (numbers). They must make the same number with all sets. The one who makes the largest number wins.

#### Long description

# Sets sets are shown at a time. A set consists of # Numbers numbers. The numbers range from 1 to Number range. For each set, the players must use each number in that set exactly once to make (write an expression evaluating to) some number x (using +,-,*,/). This x must be the same for all the sets. The player then answers x (instead of the expression). See Answering time for reaches the second phase. After the round reaches the second phase, the players must enter the expression that give x. The solution for the sets must be written in order, each separated by a space. Amongst the players who have submitted a correct solution, the player who had the largest x value wins. If many players had the same (highest) x values, the one who entered it first wins. The player who wins the round gets 1 point. If no such player exists, no player wins the round (and points do not change). The first player to reach End score points wins the game.

#### Impossible

Impossible is considered as a number and valid x value. It requires no proof (no expression need to be entered in the second phase of the game). It is considered to be smaller than any other number. As a result, if all other player enter an incorrect expression, the player who first entered impossible for an x value wins the round.

### Closest to

The following describes game modes 20,21 and 22. This variant only works with # Sets set to 1.

#### Summary

Players are shown cards (numbers). They must make the number closest to 24 that is not actually 24. They answer by the difference between their number and 24. The one who get the closest to 24 wins.

#### Long description

# Numbers numbers are shown. The numbers range from 1 to Number range. The players must use each number in that set exactly once to make (write an expression evaluating to) some number Target # + x or Target # - x (using +,-,*,/). This number should be as small as possible. The player then answers x. See Answering time for reaches the second phase. After the round reaches the second phase, the players must enter the expression that give Target # + x or Target # - x. Amongst the players who have submitted a correct solution, the player who had the lowest x value wins. If many players had the same (lowest) x values, the one who entered it first wins. The player who wins the round gets 1 point. If no such player exists, no player wins the round (and points do not change). The first player to reach End score points wins the game.

#### Impossible

Impossible is considered as a number and valid x value. It requires no proof (no expression need to be entered in the second phase of the game). It is considered to be larger than any other number. As a result, if all other player enter an incorrect expression, the player who first entered impossible for an x value wins the round. Impossible is only useful in this mode if you think that your pponent(s) have entered their answer too quickly and you want to go to the second phase of the round.

For Tony Four and Closest to, the are 3 possible timing schemes.

Game modes 10 and 20.

In this scheme, all players have the same amount of time enter their x value (this time is Answer time). They can change this value as long as the time is not elapsed (and only the last value entered will be retained). The round goes into the second phase after the time has elapsed.

#### Wait until everyone gives an answer

Game modes 11 and 21.

This scheme is like the previous scheme, but when all players have entered an x value, the round also goes into the second phase.

#### Original

Game modes 12 and 22.

This is the scheme that Tony Four was originally designed for.

Player see x values that other players are submitting.

A player can enter a new x value as long as no other player has entered a x value. The game time outs in the same manner as the previous case (Wait until everyone gives an answer).