STORM CITYROLLER DERBY

Inside a jam / Interactive field guide

READ
THE PLAY.

Slow the game down. Follow the star.
Three situations, one track, no guesswork.

TRACK LAB / 01
ILLUSTRATED PLAY
PURPLE00
VS
CREAM00

READY TO ROLL

JAMMER LINEPIVOT LINEFLAT TRACK / COUNTERCLOCKWISETHE LINEUPSCHEMATIC · NOT TO SCALE•••Ⅱ★•••Ⅱ★
★ JammerⅡ Pivot• BlockerJ = star in hand

Read the play

01 / 04

Ten skaters. Two stars.

Each team fields a jammer and up to four blockers. The star marks the jammer; the stripe marks the pivot. Both jammers begin behind the pack.

Example play, not a match replay. WFTDA 20250101 ↗

Choose a situation, then use Next play. Play sequence advances automatically; pause whenever you want a closer look. Keyboard controls work with Tab, Enter and Space.

This is a teaching schematic with simplified positions and example scores. It does not simulate collisions, penalties, overtime or every rules exception.

What each situation teaches

THREE PLAYS.
A BETTER VIEW.

Open the rules reference ↗
01

Where do the points come from?

Follow Purple from the start line to a four-point scoring trip. An ordinary jam, with no penalties or star passes.

Read the governing rule ↗
Read all steps as text
  1. Ten skaters. Two stars.

    Each team fields a jammer and up to four blockers. The star marks the jammer; the stripe marks the pivot. Both jammers begin behind the pack.

  2. The first eligible jammer earns lead.

    Purple earns all required passes and gets beyond the foremost in-play blocker. The referee awards lead. This initial trip scores no points.

  3. One lap later: the scoring approach.

    Purple has come around the track to the rear of the pack. Cream has now completed its own initial trip. Neither team has scored yet.

  4. Four opponents. Four points.

    Purple legally laps all four opposing blockers with the star visible. Each earns one point. Passing the opposing jammer does not add a fifth.

02

Why stop a jam you’re winning?

Lead gives a jammer a tactical choice: take the points and end the jam before the opponent can answer.

Read the governing rule ↗
Read all steps as text
  1. Ten skaters. Two stars.

    Each team fields a jammer and up to four blockers. The star marks the jammer; the stripe marks the pivot. Both jammers begin behind the pack.

  2. The first eligible jammer earns lead.

    Purple earns all required passes and gets beyond the foremost in-play blocker. The referee awards lead. This initial trip scores no points.

  3. One lap later: the scoring approach.

    Purple has come around the track to the rear of the pack. Cream has now completed its own initial trip. Neither team has scored yet.

  4. Four opponents. Four points.

    Purple legally laps all four opposing blockers with the star visible. Each earns one point. Passing the opposing jammer does not add a fifth.

  5. Take the four. Close the door.

    Cream is approaching its scoring trip. Purple, still lead, repeatedly puts hands on hips to call the jam. The jam ends with the officials’ four-whistle sequence, preserving this example’s 4–0 result.

03

Can another skater become the jammer?

Yes. A legal hand-to-hand pass to the pivot transfers the role. Watch the helmet symbols and the job, not just the player’s position.

Read the governing rule ↗
Read all steps as text
  1. The jammer is stuck.

    Cream has earned lead. Purple is still on its initial trip and brings the star toward its own pivot, marked with a stripe.

  2. Star off. Same jammer for now.

    Purple takes off the star. Removing it does not transfer the role; Purple is still the jammer, but cannot earn passes with the star off.

  3. Release into the pivot’s grasp.

    Both are upright, in bounds and in play, and neither is going to or queued for the box. The legal handoff makes the pivot the jammer; the original jammer becomes a blocker.

  4. New jammer. Same unfinished trip.

    The new jammer puts the star on and finishes the initial trip. The team has not gained lead and the scoring trip has not reset. There are still zero points in this example.

Now watch the other eight

THE PACK
IS THE GAME.

Once you can follow the jammer, look at the blockers. Their position determines the pack and the engagement zone. That explains when they can engage, when they have to return, and why a “no pack” call changes the play.

Understand the pack ↗