====== @Doppel ======

  * Doppel is a simple multiplayer guessing game centered around matching the leader's choice.
  * Each player selects a symbol (card) while trying to predict what the leader will choose.
  * The goal is to match the leader's card—or avoid being matched if you are the leader.
  * The game emphasizes intuition, prediction, and light bluffing.

===== Cards =====

  * The game uses the following symbols: ★, ●, ◆, ♪, ■, ▲, †, ▼
  * The number of selectable cards depends on the number of players.
  * More players = more available symbols.

===== Rules =====

  - When the game starts, all players select one card.
  - Players can change their selection until everyone has chosen.
  - The round proceeds automatically once all players have selected a card.
  - The leader's card is revealed at the end of the round.
  - Players who chose the same card as the leader win.
  - If no players match the leader, the leader wins.
  - After the round ends, a new round must be started.

===== Bet =====

==== Bet ====

  * The number of coins paid when selecting a card for the first time.

==== Reward pool ====

  * The total coins collected from all players in the round.

===== @Start =====

  * Resets all players' selections and begins a new round.
  * Only the leader can start the game.
  * At least 2 players are required.

===== Card selection =====

  * Choose one available symbol (★ ～ ▼).
  * When selecting a card for the first time:
    * You pay the bet amount in coins.
  * You may change your card before all players have chosen.

===== Round resolution =====

==== If one or more players match the leader ====

  * All matching players win.
  * The reward pool is split evenly among them.
  * One of the winners becomes the new leader.

==== If no players match the leader ====

  * The leader wins.
  * The leader receives the entire reward pool.
  * The leader remains unchanged.

===== Win =====

  * Match the leader's card to receive a share of the reward.

===== Lose =====

  * Fail to match the leader and lose your bet.

===== Notes =====

  * The leader does not count as a matching winner.
  * Players who have not selected a card are ignored until they do.
  * Each round ends immediately after results are determined.