King of Diamonds (Beauty Contest)

Additional Players: Hinako Daimon, Takashi Asuma, Benzo Yashige

Citizens: Keiichi Kuzuryu - King of Diamonds

Player Limit: 4

Time Limit: 1 minute per round

Rules

Upon entering, all players must shackle themselves to a seat. Above their heads is a weight/equilibrium stand that holds a corrosive liquid
All players select a number between 0 and 100 for each round. The average of the values will be multiplied by 0.8. The person who chooses the number closest to this average wins the round. All losers will lose a point
A new rule is introduced for every player eliminated
If 2 or more people choose the same number, the number they choose becomes invalid and they will lose a point, even if the number is closest to the average
When there are 3 players remaining if there is a person who chooses the exact correct number, the loser penalty is doubled
When there are only 2 players remaining, if someone chooses 0, the player who chooses 100 is the winner

Details

With the rules applied when there are just two players left, the game essentially becomes a game of rock, paper, scissors between the numbers 0, 1, and 100.

Solution

When there are only 2 players left, it is the most ideal for the person who is behind in points to choose 100, and for the person in the lead to select 1 or 0. Although 0 is the most powerful number to choose from, it is also balanced by the opponent choosing 100.