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The game-theory layer the field doesn't have.

GPP Lab moves from the weekly slate and your projection snapshot to ownership-aware lineup construction, contest simulation, and post-contest review. It helps compare lineup structures by how they interact with the field — not by projected points alone.

DraftKings NFL Classic · single-entry, 3-max, and 20-max · fields up to 12 000 entries

Start with the slate Try the free tools

What it measures

Modeled joint ownership
Estimates how often a complete QB + same-team WR/TE stack appears together in the simulated field instead of assuming individual ownership percentages combine independently.
Stack leverage
Compares correlated, ceiling-weighted outcome range with modeled joint ownership for a complete QB + 1 or QB + 2 same-team WR/TE stack. The read is descriptive and reports its field-model evidence.
Outcome width vs. ownership
Maps relative outcome width against projected ownership using slate medians. Its four descriptive regions compare high or low width with high or low ownership; it is not a guarantee of results.
Correlated contest simulation
Tests optimizer lineups against a modeled opponent field for up to 10 000 iterations. It uses player-specific historical volatility when available and incorporates contest settings, payout structure, and duplication into EV.

How the Lab is organized

  1. 1. Slate and inputs

    Choose the published DraftKings Main slate, review the shared player pool, and add your private projection snapshot.

  2. 2. Read and form a thesis

    Read game context and free research, then use the invite-gated Leverage Board, Stacks, and FLEX views to shape a slate thesis.

  3. 3. Build and adjust

    Construct up to 20 lineups with explicit constraints, then use Late Swap when entered lineups need an in-contest update.

  4. 4. Sim and review

    Test candidate lineups in Sim Lab and compare projections, ownership, field construction, and winning patterns in Results.

Invite-gated access

Leverage Board, Stacks, FLEX, Optimizer, Late Swap, Sim Lab, and Results require an invite code. There is no subscription or paywall; Ko-fi donations keep the lights on.

Support on Ko-fi →Read Help & FAQ →

Available without an invite