This page explains how Eric Zheng (USATT# 35038)'s rating went from 1890 to 1854 at the Spinathon held on - 25 May 2008. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.