Quarto

Overview

Quarto is a two-player abstract strategy game with 16 unique pieces, each defined by 4 binary attributes. The twist: your opponent chooses which piece you must place. Win by completing a row of 4 pieces sharing at least one common attribute and declaring “Quarto!”

Components

Component	Quantity
Game board (4x4 grid)	1
Game pieces (all unique)	16

Piece attributes (each piece has one of each):

• Color: dark or light
• Height: tall or short
• Shape: square or round
• Top: solid or hollow

Each piece is unique – no two share all 4 attributes.

Setup

1. Place all 16 pieces off the board, visible to both players.
2. Determine who plays first.
3. The first player’s opponent selects a piece and hands it to the first player.

Turn Structure

1. Place the piece your opponent gave you on any empty space on the board.
2. Check for a winning line and declare “Quarto!” if found.
3. Select a piece from the remaining off-board pieces and hand it to your opponent.

Actions

On your turn you place the piece given to you and then select a piece for your opponent. Play alternates until someone wins or all 16 pieces are placed (draw).

Scoring / Victory Conditions

Win: Declare “Quarto!” after placing a piece that completes a horizontal, vertical, or diagonal row of 4 pieces that all share at least one common attribute (e.g., all tall, all round, all dark, or all hollow).

Advanced rule: A 2x2 square of 4 pieces sharing a common attribute also counts as a win.

Draw: If all 16 pieces are placed without a Quarto, the game is a draw.

Important: If you complete a Quarto but fail to declare it, your opponent may declare it on their turn and win instead.

Special Rules & Edge Cases

• The hollow pieces should be placed right-side up so the hollow top is visible.
• A winning line can be based on any single shared attribute – the 4 pieces do not need to match on all attributes, just at least one.
• Simple play variant (for younger players): Limit the winning features to fewer than all 4 (e.g., only color, or only color and height).

Player Reference

Attribute	Options
Color	Dark / Light
Height	Tall / Short
Shape	Square / Round
Top	Solid / Hollow

Win Condition	Requirement
Standard	4 in a row (horizontal, vertical, diagonal) sharing 1+ attribute
Advanced	Also: 2x2 square sharing 1+ attribute
Declaration	Must say “Quarto!” – if missed, opponent can claim it