This page explains how THOMAS YOST (USATT# 14987)'s rating went from 1287 to 1582 at the Sun TV Open held on - 16 Aug 1998. 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.