Question 1

What is THE SOLVER’s DFS simulator and what does it do?

Accepted Answer

THE SOLVER DFS simulator takes a lineup (or multiple lineups) and simulates them in a DraftKings/FanDuel contest. You can think of the tool as one that uses what types of lineups will be entered into a contest and the players’ predicted performance to let users evaluate how well a lineup might do in that contest.

Question 2

How is the SIM ROI calculated?  What does it represent?

Accepted Answer

The SIM ROI is calculated by summing up all of the prizes your lineup theoretically wins across our simulations, divided by the required contest entry fees. The SIM Cash Rate is how often the lineup finishes in a paying position in our simulations.

Question 3

Do I need an ETR Subscription to use this product?

Accepted Answer

No. While the product is based in part on ETR analysis, no subscription to ETR or any other content provider is required to use it.

Question 4

What slates does the simulator work with?

Accepted Answer

Currently we support all NFL main slates, NFL classic “early only”, “afternoon only”, and any size-able added slates on DraftKings, as well as large main slate DraftKings Showdowns (such as TNF, SNF, MNF, or island games). At this time, we will only support the main classic slate on FanDuel, as well as large main slate showdowns such as TNF, SNF, MNF, and island games.

Question 5

Do you guarantee that I’ll win if I play lineups that show a positive ROI in the simulator?

Accepted Answer

No. It’s important to us that we’re honest about what we can and can’t do. We’re serious about creating high-quality tools and have spent our careers building our knowledge while earning the trust of our audience. We make no guarantees and do not claim to provide any sort of financial or investment advice. If you think it’s important that someone provides or implies some sort of guarantee about the results you will have using the service, you’re in the wrong place.

Question 6

What is the best DFS simulator for DraftKings and FanDuel?

Accepted Answer

We believe THE SOLVER DFS Simulator is the most realistic way to test DraftKings and FanDuel tournament lineups. It was built in partnership with Establish The Run, and what sets it apart is the quality of the inputs: ETR player projections, field lineups modeled on what actually gets entered into your specific contest, correlation-aware simulations of every game, and a post-lock dashboard that re-sims your lineups against the actual lineups entered in the contest. It supports NFL and Golf, requires no ETR or Optimizer subscription, and pricing starts at $24.99/month. We're also upfront about its limits — it's built for tournaments, not cash games, and it makes no guarantees about results.

Know how your lineups perform — before the contest locks

Every lineup, scored before kickoff

SIM ROI

SIM Cash Rate

Finish Distribution

Not a toy — a real contest simulation

Project every player

Build the field

Sim the full tournament

Single Lineup Simulator

Multi Lineup Simulator

Where it works

Simulator + Optimizer

Don’t take our word for it

Simple pricing

Single Lineup Simulator

25 Lineup Simulator

1000 Lineup Simulator

Common questions

DFS Optimizer

DFS Simulator

Best Ball

DFS Bankroll Tracker

THE SOLVER