Alice in Borderland Wiki
Advertisement
Manga
Four of Diamonds
Information
Difficulty 4
Category Diamonds
Game Venue Closed Room
Status Cleared
Participants
Players Rizuna An
Taketo Serizawa
Unnamed Players (x2)
Dealers
Citizens


The four of diamonds was completed by beach members, Rizuna An, Taketo Serizawa, and two unnamed members. It was the second to last numeric card needed at the Beach, as well as the last Diamond card.

Game Overview

Set-Up

Player Limit: None

Time Limit: Until the water reaches the electrical wires

Prize: None

Once all players enter the room, it begins to fill with water. Dangling from the ceiling are 4 severed electrical wires.

Rules

  • In the room there is one light-bulb and a door to an adjacent room where there are three switches.
  • There is one switch that connects to the light-bulb.
  • With the door closed, players may flip any switch. While the door is open, players may only flip the switch once.
  • The door will not close if there are people in both rooms or a switch is flipped.
  • It is Game Clear if players can unanimously answer which switch turns on the light.
  • If the water level rises and the surface of the water touches the high current lines, it's Game Over.

Solution

The solution is surprisingly simple. Close the door, and flip switch A on for until the water is just a few inch sea from the wires. Turn the switch off, immediately open the door, and flip switch B. If it doesn’t turn on, it’s not switch B. Then feel the light bulb. If it’s hot, the answer is A. If not, then it’s C. This can be done in any order with any switch.

Strategy

Explanation of 66% Probability

Rizuna An calculates that the initial solution proposed by a Beach member; where they daringly open the door, flip a switch, and should it remain off, then guess between the remaining 2 switches, has a 66% probability of yielding the correct answer, not 50%. This is because starting out by flipping any switch with the door open has a 33% of immediately revealing the correct switch at that point (bulb lights up). However, there is a 66% chance the bulb does not light up, then the players will have to guess between the two remaining switches with a 50% chance of being right. Therefore, the probability of successfully identifying the correct switch using this overall strategy is 66%; 33% (bulb lights up) plus 66%*50% or 33% (bulb does not light up, guess the correct switch from two remaining switches).

Trivia

  • This was the first Diamonds game to be shown in the series.

Gallery

Levers A, B, and C

An flips lever A

Four of Diamonds is cleared

V· T·E Games
Clubs [♣] Ace of Clubs.png Two of Clubs.png Three of Clubs.png Four of Clubs.png Five of Clubs.png Six of Clubs.png Seven of Clubs.png Eight of Clubs.png Nine of Clubs.png Ten of Clubs.png Jack of Clubs.png Queen of Clubs.png King of Clubs.png
Spades [♠] Ace of Spades.png Two of Spades.png Three of Spades.png Four of Spades.png Five of Spades.png Six of Spades.png Seven of Spades.png Eight of Spades.png Nine of Spades.png Ten of Spades.png Jack of Spades.png Queen of Spades.png King of Spades.png
Diamonds [♦] Ace of Diamonds.png Two of Diamonds.png Three of Diamonds.png Four of Diamonds.png Five of Diamonds.png Six of Diamonds.png Seven of Diamonds.png Eight of Diamonds.png Nine of Diamonds.png Ten of Diamonds.png Jack of Spades.png Queen of Diamonds.png King of Diamonds.png
Hearts [♥] Ace of Hearts.png Two of Hearts.png Three of Hearts.png Four of Hearts.png Five of Hearts.png Six of Hearts.png Seven of Hearts.png Eight of Hearts.png Nine of Hearts.png Ten of Hearts.png Jack of Hearts.png Queen of Hearts.png King of Hearts.png
Others [⚂] Unknown Cards · Unknown Venues
Advertisement