> ## Documentation Index
> Fetch the complete documentation index at: https://offthepace.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Ghost Car: driver skill in equal machinery

> Three features that transplant drivers into a common car and re-run the race, turning subjective impressions of 'strong drives' into quantified, car-removed rankings and championship simulations.

## What this pillar does

Ghost Car answers one question: **what would happen if you removed the car advantage?**
Every feature here takes a driver, swaps them into a chosen host car, and re-scores them
against the real grid using the same seven-term decomposition that powers the Lap
Decomposition pillar, combined with a Monte Carlo race simulation.

The ghost recombination reads `fct_ghost_race_finish`, which carries predicted finish
positions and confidence intervals for every driver × host-car pairing. The circuit-level
leaderboard uses `int_driver_circuit_era_affinity`, which shrinks car-removed pace estimates
to a per-driver, per-circuit, per-era grain.

## Every feature in this pillar

<CardGroup cols={2}>
  <Card title="Ghost Race Standings" icon="trophy" href="/app/ghost-race-standings">
    A per-circuit, per-era leaderboard ranking drivers by car-removed pace, so the board
    reads as driver skill at that track rather than whose car was quickest.
  </Card>

  <Card title="Counterfactual Championship" icon="git-branch" href="/app/counterfactual-championship">
    Every driver transplanted one at a time into a chosen host car and re-scored against the
    real grid, summed into a what-if championship across a season.
  </Card>

  <Card title="Hidden Performance" icon="eye-off" href="/app/hidden-performance">
    Drivers whose ghost-projected finish beat their actual result strong drives masked by
    car pace, strategy, or circumstance.
  </Card>
</CardGroup>