Liar's Dice Documentation » Game Rules

Game Setup

• Each player starts with 5 dice and 5 points
• All players roll their dice secretly at the start of each round
• Dice values range from 1 to 6
• Wild Rule: 1s are wild and count as any face value

Gameplay Flow

1. Starting a Round
   • All players roll their dice secretly
   • Players can only see their own dice
   • The first player makes an initial guess
2. Making a Guess
   • A guess consists of: quantity + face value
   • Example: "three 4s" means at least 3 dice showing 4
   • Each guess must be higher than the previous:
     • Higher quantity (any face value), OR
     • Same quantity with higher face value
3. Calling Liar
   • Instead of guessing, a player can call "liar"
   • All dice are revealed
   • The actual count is determined (including wild 1s)
   • Loser loses points based on the outcome

Winning Conditions

• Players lose points when they lose a challenge
• When a player reaches 0 points, they are eliminated
• The last player with points remaining wins

Point System

The point-based elimination system works as follows:

• Starting Points: Each player begins with 5 points
• Lying Penalty: Lose 1 point if caught lying
• False Accusation: Lose 2 points for incorrectly calling liar
• Elimination: Players with 0 points are removed from the game

Wild Dice (1s)

The wild dice rule adds strategic depth:

• 1s count as the face value being guessed
• Example: With dice [1,1,4,4,5], the count for 4s is 4 (two 4s + two 1s)
• This increases probabilities and enables bolder guesses

Valid Guesses

A guess is valid if it meets these criteria:

1. Quantity: Must not exceed total dice in play
2. Progression: Must be higher than previous guess:
   • More dice (e.g., "four 3s" after "three 6s")
   • Same quantity, higher face (e.g., "three 5s" after "three 4s")
3. Face Value: Must be between 2 and 6 (1s are wild)

// Validation logic
bool is_valid_guess(const Guess& new_guess, const Guess& previous) {
    if (new_guess.face_value < 1 || new_guess.face_value > 6) 
        return false;
    
    if (new_guess.dice_count > total_dice_in_play) 
        return false;
    
    // Must increase quantity or keep same with higher face
    return new_guess.dice_count > previous.dice_count ||
           (new_guess.dice_count == previous.dice_count && 
            new_guess.face_value > previous.face_value);
}

Basic Probabilities

For standard dice (no wilds):

• Probability of specific face: 1/6 ≈ 16.67%
• Expected count: (total dice × 1/6)

With wild dice rule:

• Probability of specific face: 1/3 ≈ 33.33%
• Expected count: (total dice × 1/3)

Probability Table

Basic Strategy

1. Conservative Opening: Start with probable guesses
2. Track Information: Remember what others claim to have
3. Bluff Sparingly: Occasional bluffs keep opponents guessing
4. Know the Odds: Understand when guesses become improbable

Advanced Strategy

1. Pattern Recognition:
   • Watch for player tendencies
   • Some bluff early, others late
   • Identify conservative vs aggressive players
2. Information Management:
   • Your guesses reveal information
   • Sometimes guess what you don't have
   • Force opponents to reveal their hands
3. Psychological Warfare:
   • Quick calls suggest confidence
   • Hesitation can induce doubt
   • Vary your timing and demeanor
4. End Game:
   • With few dice left, exact counts matter
   • Bluffing becomes riskier
   • Conservative play often wins

Common Variants

1. Spot On: Exact guess earns bonus (everyone else loses a die)
2. Passing: Can pass instead of guessing (limited uses)
3. Blind Bidding: Can increase bid without looking at dice
4. Progressive Dice Loss: Lose dice instead of points

Popular House Rules

• No Wilds: 1s are not wild (harder game)
• Ace High: 1s are highest value instead of wild
• Minimum Bid: Must start with at least 2 dice
• Death Roll: Eliminated players get one final round