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Elo difference mapping to Snowie ER

Posted By: Rich Munitz
Date: Monday, 10 May 2010, at 2:34 a.m.

In Response To: Elo difference mapping to Snowie ER (Christian Plenz)

XG does indeed use a 33 Elo = 1 PR ratio.

From the online help:

2. Equivalence between performance and Elo There is, roughly, a linear relation between Elo (GammonSite equivalent) and performance:

Elo=2240-performance*16500

3. Performance Rating (PR) Performance rating express your performance using a easy to manipulate number.

PR= -performance*500

So performance = PR/500 and Elo = 2240-PR/500*16500 = 2240-PR*33

So Elo is proportional to PR*33

General perception seems to be that PR ~ 1.1 (Snowie) ER. If that is true, then

1 (Snowie) ER ~ 30 Elo.

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