Just4Fun

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

Overview

Just4Fun (also called Fourmation) is a strategy game for 2-4 players where players play numbered cards to place colored stones on a numbered grid, trying to control four fields in a row. The game combines hand management with area majority, as each field can hold multiple players’ stones and control is determined by who has the most.

Components

Setup

  1. Each player takes 20 stones of their chosen color.
  2. Shuffle the card deck and deal 4 cards to each player.
  3. Place the remaining cards face down as the draw pile.

Turn Structure

On your turn:

  1. Play cards: Play 1 to 4 cards from your hand. Add their values together to determine which numbered field receives your stone.
  2. Place a stone: Place exactly one of your stones on the field matching the sum of your played cards.
  3. Draw cards: Draw cards from the draw pile equal to the number you played, restoring your hand to 4 cards.

Actions

Playing Cards

Placement Restrictions

Unable to Move

Scoring / Victory Conditions

Immediate Win: A player wins immediately if they have majority control (at least 1 more stone than any other player) on 4 fields in a row – horizontally, vertically, or diagonally.

Timed Win: If no player achieves four-in-a-row within 20 rounds, the game ends. Each player totals the field numbers of all fields they control (have majority on). The player with the highest total wins.

Special Rules & Edge Cases

Player Reference

Key Numbers Value
Grid size 6x6 (36 fields)
Stones per player 20
Hand size 4 cards
Cards in deck 55
Win condition 4 fields in a row with majority
Max rounds 20 (if no immediate win)