Run your first sim

Last updated Oct 13, 2026

Simulate takes a pool you already built and scores it against one or more contests. It runs from the lineups panel on any slate and takes about a minute. When it finishes, every lineup carries sim metrics and the panel picks a sim-based Selection for you.

Before you start

  • Build a pool first. See Your first build.
  • Know the contest you plan to enter. The sheet can prefill its size, fee, and payouts. See Find contests.
  • If you uploaded an entries CSV, the scenarios are already set from your contests. See Upload your entries.

Step by step

  1. Open the slate and click the LINEUPS rail on the right edge of the workspace.
  2. Click Simulate in the panel footer.

  1. Read the Contest Simulation sheet. It opens with one scenario, Sim 1, a 10,000-entry, 150-max GPP with a $10 fee, with 150 of your lineups entered. With an entries file on the slate, it opens with one scenario per contest you entered.

  1. Change the scenario or keep the defaults. See Contest Simulation settings.
  2. Click Run Simulation. With more than one scenario the button reads Run N Simulations.
  3. Keep the page open until every scenario finishes. Cancel simulations stops the run and keeps every scenario that already finished.

  1. Read the results. The panel reveals every scenario at once when the last one finishes.

What changes when it finishes

WhereWhat you see
Footer buttonRe-Simulate. Click it to run every scenario again over the same pool.
Entries Preview countLocks to the total of My Entries across your scenarios, or to the entries file.
Footer, with an entries fileA Fill N button, so you can fill your entries from the simulated working set.
SelectionLands on Win Paths, a method that needs a sim. Rank by hides while Win Paths is active.
Scenario bandOne band per scenario with its ROI, plus a picker that fills that contest by its own method. A contest's band shows its entry count. A scenario without a contest shows its field size and fee. A wider panel adds the Top 1%, or Win% for a contest of 100 entries or fewer.
Lineup cardsA signed ROI in the header, and Win%, Top 0.1%, Top 1%, Top 5%, Cash%, and Lev in the bottom row. On a card in Entries Preview, Paths takes the place of Lev when the sim of its contest or scenario tracked Win Paths. Leaders get a badge such as Best Ceiling.
Pool tabOne row per scenario on every card, ranked by ROI. With two or more scenarios, a contest picker beside Rank by names the contest that ranks the Pool.

How it works

Every scenario is a separate simulation over the same pool. The result is saved with your build, so it follows you to another device and survives a reload. Re-Simulate replaces the results of every scenario in the list.

Tips

  • Run the default 10K GPP first to see the shape of your pool, then prefill the real contest and run again.
  • Read the % to 1st chip before you run. A GPP with 20% or more to 1st rewards ceiling. A cash game rewards floor.
  • A large pool against a large field takes the longest. Leave time before lock.
  • After the run, switch Selection to Highest Ranked to bring Rank by back and sort by any metric.
  • If you edit projections or trash lineups, click Re-Simulate. The numbers belong to the pool as it was when it ran.

Troubleshooting

"Simulation failed. Your lineups are still here." : the sim step of a Build & Sim run failed. Open the lineups panel and click Simulate.

""<scenario>" sim results didn't save" or "N sims' results didn't save" : click Re-Simulate.

"Simulation issue" : one scenario was dropped during the run. The toast names the reason. Fix the scenario in the sheet and run again.

"Couldn't start the sim. Try again in a moment." or "Couldn't run the sim. Try again in a moment." : wait a few seconds and click Simulate again.

"Sim result was not delivered" or "Sim result arrived incomplete" : the result did not reach your browser. Click Re-Simulate.

"This simulation is too large for the server path (N lineups, limit 10000). Reduce the lineup count." : rebuild with 10,000 lineups or fewer.

"You already have N server builds running. Wait for one to finish, then try again." : Essential runs up to 2 cloud builds at once. Power runs up to 4. Wait for one to finish.

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