Piranha Pedro

AI-friendly board game rules summaries — use with Claude, ChatGPT, or any AI assistant

Overview

Piranha Pedro is a programmed-movement game where players simultaneously play cards to move Pedro across a board surrounded by piranhas. Players try to avoid being the one who causes Pedro to step on a piranha, fall off the board, or land on a water field without stones. The last player to avoid receiving their 2nd piranha wins (or 3rd piranha in 2-player games).

Components

Setup

  1. Put all seven piranhas on the marked fields.
  2. Put Pedro on the palmtree field.
  3. Put a landscape card on each side of the game board.
  4. One player takes the sombrero card.
  5. Each player takes a set of move cards (each set contains 12 cards with the same backside color) in hand.
  6. Each player gets a private stock of 4 stones.

Turn Structure

Move Round

  1. Each player chooses one of their hand cards and puts it face-down in front of them.
  2. The player with the sombrero card shows their card first and moves Pedro the number of fields shown on the move card (1, 2, or 3 arrows) in the indicated direction.
    • Note: Before Pedro can step on a water field, the player must place one of their stones on it.
  3. After moving Pedro, the player shows the card they played (placed face-down half under the game board).
  4. The sombrero card is passed to the left neighbor and a new move round begins.

Pedro Falls Into the Water

The move round ends immediately when:

The player must take one of the piranhas from the board as punishment (they may choose which one) and place it in front of them.

Evaluation

All players now show face-down cards from that round (including ones not yet shown). Points for cards still in hand:

Cards in hand Stones received
Every single move card with 1 arrow 1 stone each
Every move card with 2 arrows No stones
Every move card with 3 arrows No stones

Players with only move cards with 2 and 3 arrows receive no stones.

After evaluation, each player takes all 12 move cards back. The sombrero card passes to the left neighbor. Pedro starts on the last safe entered field before falling into water. A new move round begins.

Actions

On each turn, players simultaneously select and play one movement card from their hand of 12. Cards specify:

Players place stones from their personal supply to allow Pedro to cross water fields.

Scoring / Victory Conditions

As soon as a player receives their 2nd piranha, they have lost the game and all other players win. In a 2-player game, the game ends when a player receives their 3rd piranha.

Special Rules & Edge Cases

Player Reference

Card Type Movement Stones from evaluation
1 arrow 1 space 1 stone per card in hand
2 arrows 2 spaces 0 stones
3 arrows 3 spaces 0 stones

Lose condition: Receive 2nd piranha (3rd in 2-player game).