How to Play Gridball

Overview

Gridball is played on a 24×24 foot square marked into four equal 12×12 foot quadrants: Prime, Major, Minor, and Entry. Two teams of up to 14 players each send two active players onto the grid at a time — one team controls Prime and Major; the other controls Minor and Entry.

Play begins with a serve from Prime. The ball must be struck underhand, bounce once in Prime, then travel to an opponent's quadrant. From there, players defend their zones by returning the ball after a single bounce. When a player fails to return a ball, returns it out of bounds, or commits a foul, they are eliminated — their opponent scores, the eliminated player exits the grid, and the team rotates along the fixed Z-path. The Next In Player steps onto the court at Entry, and the next round begins with a fresh serve from Prime.

All the usual team-sport structure applies: co-ed rosters, quarters, timeouts, officials, and a coin toss for Grid Advantage. What makes Gridball distinct is that there are no positions — every player rotates through every quadrant over the course of the match.

Objective

Score more points than your opponent across four quarters of play.

Points are earned three ways: by eliminating opponents (1 point each), by holding the Major quadrant for four consecutive rounds without being eliminated (a Grid Hold, 3 points), and by holding the Prime quadrant for four consecutive rounds without being eliminated (a Gridlock, 7 points). The team with the higher score when the final quarter clock expires wins the match.

The Grid

The court is a 24×24 foot square divided by two perpendicular lines through the center, forming four equal 12×12 foot quadrants. Indoors, mark the grid with painter's tape on a flat surface. Outdoors, chalk on pavement, concrete, or blacktop works. The quadrants are labeled as follows:

• Prime (top-left) — the highest-value quadrant. Holding Prime for four consecutive rounds scores a Gridlock (7 points). Serves are always executed from Prime.
• Major (top-right) — second-highest value. Holding Major for four consecutive rounds scores a Grid Hold (3 points).
• Minor (bottom-left) — a transitional quadrant on the way up the Z-rotation.
• Entry (bottom-right) — where the Next In Player enters the grid after an elimination.

One team occupies Prime and Major; the other occupies Minor and Entry. Assignment is determined by the Grid Advantage coin toss before the match — the winning team takes Prime and Major.

Teams & Roster

• 14 players per team. Co-ed roster required.
• 7 male-identifying and 7 female-identifying players per squad.
• 2 active players per team on the court at all times — one per side of the Z-rotation. One team controls Prime + Major; the other controls Minor + Entry.
• 1 player per side at all times. If a player is eliminated, the Next In Player must step onto the grid immediately to preserve side coverage.

The Next In Player

The Next In Player is not a one-time designation — it is a continuous role throughout the entire match. Before every single round, each team must have a player staged and ready to enter at the Entry quadrant. The moment an elimination occurs, that player steps onto the court immediately. The team then designates a new Next In Player for the following round.

This cycle repeats on every elimination, every quarter. Failure to have a Next In Player ready at Entry constitutes a Time Wasting infraction.

Equipment

Gridball was designed to be played anywhere. No specialized gear is required.

• The ball — any standard playground ball.
• Indoor surface — painter's tape on any flat floor to mark the 24×24 ft grid.
• Outdoor surface — chalk on pavement, concrete, or blacktop.
• Footwear — athletic shoes appropriate for the playing surface.

For sanctioned league play, officials also use a visible scorecard and a clock capable of 16-minute countdown periods. Referee hand-signal specifications are included in the full Official Rulebook.

Match Structure

• 4 quarters of 16 minutes each.
• Clock counts down from 16:00 and expires at 0:00.
• 7 timeouts per team, per match.
• Maximum 2 timeouts per quarter — no carryover of unused timeouts between quarters.
• Grid Advantage is determined by a pre-match coin toss. The winner's team takes Prime and Major; the losing team takes Minor and Entry.

A match ends when the fourth quarter clock expires at 0:00. The team with the higher total score wins. Tie-breaking and overtime procedures are specified in the full Official Rulebook.

The Serve

• The serve is always executed from the Prime quadrant.
• The ball must bounce in Prime before traveling to an opponent's quadrant.
• All serves must be executed underhand — overhand serves are illegal.
• After any elimination, a new round begins and Prime serves again.

The team that holds Prime controls the serve. Losing Prime — via elimination or rotation — transfers the serve to the incoming player.

Gameplay & Eliminations

Once the ball is in play, players defend their assigned quadrants by returning the ball after it bounces exactly once. The ball may be struck with any part of the body except a closed fist. A player may only strike the ball while at least part of their body is grounded within their assigned quadrant.

How a player is eliminated

• Fails to return the ball after it bounces once in their quadrant.
• Allows the ball to bounce more than once in their quadrant.
• Returns the ball out of bounds (outside the 24×24 ft grid).
• Returns the ball back into their own quadrant.
• Commits a foul carrying an elimination penalty (see Section 11).

Every elimination awards the opposing team 1 point, triggers the Z-Rotation, and resets the serve to Prime.

The Z-Rotation

Every elimination triggers an automatic rotation along a fixed Z-path. The sequence never changes.

When a player is eliminated

1. The opposing team is awarded 1 point.
2. The eliminated player exits the grid immediately.
3. Their remaining teammate advances one position along the Z-path.
4. The Next In Player enters the grid at Entry.
5. A new round begins — serve resets to Prime.

Scoring

Points are earned three ways. Hold your ground and the points compound.

Grid Hold and Gridlock counters belong to the individual player, not the team. If the holding player leaves their scoring quadrant — by elimination or by rotation — their counter resets to zero. A teammate stepping into the same quadrant starts their own counter fresh.

Fouls & Penalties

Infractions carry escalating penalties. Each offense listed below compounds — a player's 3rd foot fault of the match is treated as a 3rd offense even if the prior two were spaced across quarters.

Additional fouls, referee hand signals, and review procedures are documented in the full Official Rulebook.

Glossary

The Grid

The 24×24 foot court, divided into four 12×12 foot quadrants.

Prime

The top-left quadrant. Highest-value scoring zone. All serves originate here.

Major

The top-right quadrant. Second-highest value scoring zone.

Minor

The bottom-left quadrant. Transitional — the second step of the Z-rotation.

Entry

The bottom-right quadrant. Where the Next In Player enters the grid after an elimination.

Elimination

Removing an opposing player from the grid by forcing a failed return, an out-of-bounds hit, or an elimination-carrying foul. Awards 1 point.

Grid Hold

Holding Major for 4 consecutive rounds without being personally eliminated. Awards 3 points.

Gridlock

Holding Prime for 4 consecutive rounds without being personally eliminated. Awards 7 points.

Z-Rotation

The fixed ENTRY → MINOR → MAJOR → PRIME movement sequence triggered by every elimination.

Next In Player

The player staged and ready to enter at Entry before every round. A continuous role — not a one-time designation.

Grid Advantage

Pre-match coin toss. Winner's team takes Prime and Major for the match.

Round

A single serve-to-elimination sequence. A new round begins after every elimination.

AGPR

Aggregate Gridball Performance Rating — a per-player rating stat computed from eliminations, Grid Holds, Gridlocks, assists, defensive plays, and clutch plays. Tracked across matches.