What the rating means
Tournament Rating uses validated Retold S-tier tournament games only. Each played map is one observation, so a 3–0 and a 3–2 contribute different evidence; results against stronger opponents carry more information.
Whole-History Rating can improve a retrospective estimate when later tournament evidence clarifies an opponent's strength. It is not the same as what was known at the time, and it does not prove an infallible exact ordering.