ELCOMBO — The Placement Tool
ELCOMBO (Entropy-Lagrange-Cramér Ordered Max-Boltzmann Outcomes): the math that places one player at one (bucket, sample) point on the map. A two-parameter maximum-entropy finish-distribution over the simplex of finish-position probabilities for a single tournament, conditioned on observable structure — field size, payout vector, rake. Mathematically a Gibbs/Boltzmann exponential family that drops out of Jaynes' constrained-MaxEnt program with Lagrange multipliers on two structural sufficient statistics. Joint sufficiency of the two parameters for the asymptotic ROI distribution is proved: additional player-level covariates do not asymptotically reduce estimator variance once the two are fixed. This sufficiency is what makes the rest of the stack work — it's why a player's parameters in one bucket carry over (with a transfer correction) to an adjacent bucket. Sample-complexity bounds (VC capacity + Cramér–Rao) give the floor on data needed to recover the parameters within KL precision ε. ELCOMBO is the update rule, not the product. The product is what MUCHO does with it.
Working paper · in-session circulation