Football is not one game across the decades. So a cross-era number is a bet, not a fact.
The game changes underneath the players. The rules, the passing environment, the protections, spacing, pass rate, and the athletic baselines all shift sharply by decade. Era Projection reads a player into another era through the matrix of those factors, run against his archetype, and returns a projected KR with the per-factor breakdown, a confidence note, and a model-derived flag. It never adjudicates who would beat whom across the decades, and it never touches the standing number. It anchors each player in the game he actually played and projects the crossing as an explicit, lower-confidence read.
The engine will not settle the argument. It will price the bet.
Two ceiling anchors at the same role, one modern and one from an earlier era. The engine reads each one in the game he actually played. It does not put them on a decades-long ladder.
An anchor on a densely recorded modern player is firmer than one on a lightly recorded earlier era, and the registry says so. The reserved peaks are era-adjusted reads, not settled placements. The engine anchors the ceiling and stops. The wager across the decades is yours.
Illustrative on the real cross-era doctrine: each player anchored in his own game, the era-adjusted projection at lower confidence, the weightless refusal to adjudicate. Composite anchors named for the role.
What the game did to the number, factor by factor.
A composite modern vertical deep threat, projected back five decades. Each era factor is read against his archetype and given a signed magnitude, and the magnitudes sum to a raw net before any distance scaling.
The factors are the real levers the game moved, the passing environment and its rules, the protections, the kickoff, the overtime, spacing, pass rate, and the athletic baselines, each read against the archetype so the deep threat who gains most from the modern rules loses most projecting back. The number a player put up was always partly a number the era handed him.
Illustrative on the real era matrix: the evolution factors read against the archetype and summed to a raw net. Composite player, demonstration figures.
A projected number, with its distance and its doubt attached.
The same player. His standing OVERALL is a present-tense fact, read in his own game. The era-projected number is a separate, on-demand, lower-confidence read, and it never touches the standing one.
The output is the era-projected KR, the per-factor breakdown, the confidence note, and the model-derived flag, and the standing KR is never altered. Direction matters as much as distance: a modern archetype backward and an earlier-era one forward run the same matrix in opposite signs. Cross the eras as a wager with its size shown.
Illustrative on the real projection procedure: era distance scaling, level attenuation, the data-tier clamp, the era-projected KR with per-factor breakdown, the confidence note, the model-derived flag. Composite player, demonstration figures.
Football spans radically different games, and a number a player put up was always partly a number his era handed him: the rules, the passing environment, the protections, spacing, the pass rate, and the athletic baselines all shifted what a given band produced by decade. So the engine carries every anchor with its era, reads each player in the tactical and rules world he actually played in, and refuses to pretend a 1960s number and a 2020s number are the same object. A crossing between eras is a projection and never a fact: it runs the archetype through the matrix of what changed, sums the factors, scales the result by how far the jump is, attenuates and clamps it to what the thin historical record can support, and hands back a projected number with its confidence and a model-derived flag, not a settled ranking. The engine will not adjudicate who would beat whom across the decades, because that answer is not in the data. It lays out the possibility space and stops. Carry the era honestly and the cross-era question stays an honest bet. Launder it into a bare equivalence and you have manufactured a fact the game never gave you.
Read a player into another era. As a bet, with its size shown.
Era Projection runs the archetype through the matrix of what the game changed, prices the crossing by its distance and its data, and returns a projected KR with a model-derived flag, never a verdict and never a change to the standing number.