for
Roberto Sotomayor

USATT#: 1132357

Introduction
This page explains how Roberto Sotomayor (USATT# 1132357)'s rating went from n/a to 1653 at the JOOLA North American Teams held on 23 Nov 2018 - 25 Nov 2018. These ratings are calculated by the ratings processor which goes through 4 passes over the match results data for a tournament. The following values are produced at the end of each of the 4 passes of the ratings processor for Roberto Sotomayor for this tournament.

Initial Rating Pass 1 Pass 2 Pass 3 Final Rating (Pass 4)
n/a 1617 1617 1653

You can click here to view a table of all the resultant values from each of the 4 passes (and the initial rating) of the ratings processor for all of the 980 players in this tournament. Sections below for further details on the initial rating and the 4 passes of the ratings processor.

Note: We use mathematical notation to express the exact operations carried out in each pass of the ratings processor below. Whenever you see a variable/symbol such as for example ${X}_{i}^{3}$, we are following the convention that the superscript part of the variable (in this case "3") indicates an index (such as in a series), and it should not be misconstrued to be an exponent (which is how it is used by default).

Initial Rating
The initial rating of a player for a tournament is the rating the player received at the end of the most recent tournament prior to the current tournament. If this is the first tournament the player has ever participated in (based on our records), then the player has no initial rating.

The initial rating for JOOLA North American Teams held on 23 Nov 2018 - 25 Nov 2018 for Roberto Sotomayor, and its source tournament are as follows:
Initial Rating From Tournament Start Day End Day
n/a n/a

Click here to view the details of the initial ratings for all the players in this tournament.

Pass 1 Rating
In Pass 1, we only consider all the players that come into this tournament with an initial rating while ignoring all the unrated players. If a rated player has a match against an unrated player, then that match result is ignored from the pass 1 calculations as well. We apply the point exchange table shown below to all the matches participated in by the rated players:

Point Spread Expected Result Upset Result
0 - 12 8 8
13 - 37 7 10
38 - 62 6 13
63 - 87 5 16
88 - 112 4 20
113 - 137 3 25
138 - 162 2 30
163 - 187 2 35
188 - 212 1 40
213 - 237 1 45
238 and up 0 50

Suppose player A has an initial rating of 2000 and player B has an initial rating of 2064, and they played a match against each other. When computing the impact of this match on their rating, the "Point Spread" (as it is referred to in the table above) between these two players is the absolute value of the difference their initial ratings. When the player with the higher rating wins, presumably the better player won, which is the expected outcome of a match, and therefore the "Expected Result" column applies. If the player with the lower rating wins the match, then presumably this is not expected, and therfore it is deemed as an "Upset Result" and the value from that column in the table above is used. So, in our example of player A vs player B, if player B wins the watch, then the expected outcome happens, and 5 points are added to player B's rating and 5 points are deducted from player A's rating. Looking at Roberto Sotomayor's match results and applying the point exchange table, gives us the following result:

Roberto Sotomayor's Wins
Winner Loser
Point Spread Outcome Gain Player USATT # Rating Player USATT # Rating
0 0 Roberto Sotomayor 1132357 0 Oishik Mukherjee 216430 0
0 0 Roberto Sotomayor 1132357 0 Aaryan Jain 97924 0
0 0 Roberto Sotomayor 1132357 0 Tuan Pham 75975 0
0 0 Roberto Sotomayor 1132357 0 Calvin Lam 77382 0
0 0 Roberto Sotomayor 1132357 0 Philip Wu 93902 0
0 0 Roberto Sotomayor 1132357 0 Carly Googel 202572 0
0 0 Roberto Sotomayor 1132357 0 Vandita Chopra 230162 0
0 0 Roberto Sotomayor 1132357 0 Shishi Hu 213157 0
0 0 Roberto Sotomayor 1132357 0 Alex Pan 212113 0
0 0 Roberto Sotomayor 1132357 0 Zhengrui Zhong 220911 0
0 0 Roberto Sotomayor 1132357 0 Nicholas Kui 222653 0
0 0 Roberto Sotomayor 1132357 0 Amber G Liu 212114 0
0 0 Roberto Sotomayor 1132357 0 Zannie Gunn 90089 0
0 0 Roberto Sotomayor 1132357 0 James Kornegay 34117 0
0 0 Roberto Sotomayor 1132357 0 Sam Sundar 222317 0
0 0 Roberto Sotomayor 1132357 0 Tyler Russell 196592 0

Roberto Sotomayor's Losses
Winner Loser
Point Spread Outcome Loss Player USATT # Rating Player USATT # Rating
0 -0 Noel Furniss 216240 0 Roberto Sotomayor 1132357 0
0 -0 Igor Zernitsky 212100 0 Roberto Sotomayor 1132357 0