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Anthony Agpaoa

USATT#: 91933

Introduction
This page explains how Anthony Agpaoa (USATT# 91933)'s rating went from 1334 to 1580 at the US Nationals held on 14 Dec 2015 - 18 Dec 2015. 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 Anthony Agpaoa for this tournament.

Initial Rating Pass 1 Pass 2 Pass 3 Final Rating (Pass 4)
1334 1543 1334 1548 1580


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 732 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 Xi3, 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 US Nationals held on 14 Dec 2015 - 18 Dec 2015 for Anthony Agpaoa, and its source tournament are as follows:
Initial Rating From Tournament Start Day End Day
1334 NW LA Open n/a 15 Nov 2015

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 Anthony Agpaoa's match results and applying the point exchange table, gives us the following result:

Anthony Agpaoa's Wins
Winner Loser
Point Spread Outcome Gain Player USATT # Rating Player USATT # Rating
357 EXPECTED 0 Anthony Agpaoa 91933 1334 Andrey Borovik 82779 977
39 UPSET 13 Anthony Agpaoa 91933 1334 Mickey Boyle 93264 1373
5 UPSET 8 Anthony Agpaoa 91933 1334 Ching H Wang 88854 1339
53 UPSET 13 Anthony Agpaoa 91933 1334 John F. Mcfadden 29798 1387
78 UPSET 16 Anthony Agpaoa 91933 1334 Jamo Parrish 75310 1412
315 EXPECTED 0 Anthony Agpaoa 91933 1334 William Reuter 97348 1019
190 EXPECTED 1 Anthony Agpaoa 91933 1334 Graham Matthews 5896 1144
160 EXPECTED 2 Anthony Agpaoa 91933 1334 Kae Sun Lee 98081 1174
13 EXPECTED 7 Anthony Agpaoa 91933 1334 Sandy Lechtick 95019 1321
73 EXPECTED 5 Anthony Agpaoa 91933 1334 Mohan Prasad Vallabhapurapu 73410 1261
227 EXPECTED 1 Anthony Agpaoa 91933 1334 Lola Kelsey 65637 1107
230 EXPECTED 1 Anthony Agpaoa 91933 1334 Taran Tummala 93278 1104
53 UPSET 13 Anthony Agpaoa 91933 1334 John F. Mcfadden 29798 1387
184 UPSET 35 Anthony Agpaoa 91933 1334 Ajitesh Parthasarathy 91789 1518
401 UPSET 50 Anthony Agpaoa 91933 1334 Tina Chen 88191 1735
298 UPSET 50 Anthony Agpaoa 91933 1334 Brian C Riley 47621 1632

Anthony Agpaoa's Losses
Winner Loser
Point Spread Outcome Loss Player USATT # Rating Player USATT # Rating
416 EXPECTED -0 Chris Lewan 97561 1750 Anthony Agpaoa 91933 1334
39 EXPECTED -6 Mickey Boyle 93264 1373 Anthony Agpaoa 91933 1334
297 EXPECTED -0 Suraj Menon 92206 1631 Anthony Agpaoa 91933 1334
238 EXPECTED -0 Alexander M Wu 92296 1572 Anthony Agpaoa 91933 1334
238 EXPECTED -0 Ricardo Amayo 89273 1572 Anthony Agpaoa 91933 1334
264 EXPECTED -0 Ed Cohen 25364 1598 Anthony Agpaoa 91933 1334
496 EXPECTED -0 Linda Shu 94600 1830 Anthony Agpaoa 91933 1334
324 EXPECTED -0 Billy Fu 64549 1658 Anthony Agpaoa 91933 1334
238 EXPECTED -0 Mario D'Ortenzio 34920 1572 Anthony Agpaoa 91933 1334
667 EXPECTED -0 Gideon Teitel 75508 2001 Anthony Agpaoa 91933 1334
372 EXPECTED -0 Aarushi Bajpai 88392 1706 Anthony Agpaoa 91933 1334

You can click here to view a table of outcomes and points gained/lost from all the matches with all the players in this tournament.

The "Outcome" column above, shows whether the match had an expected (player with the higher rating wins the match) or an upset (player with the higher rating loses the match) outcome. Based on this outcome, and using both the player's initial rating, we apply the point exchange table from above and show the ratings points earned and lost by Anthony Agpaoa in the "Gain" column. Matches are separated out into two tables for wins and losses where points are gained and lost respectively. We get the following math to calculate the Pass 1 Rating for Anthony Agpaoa:

Initial Rating Gains/Losses Pass 1 Rating
1334 + 0 + 13 + 0 + 8 + 13 + 16 + 0 + 1 + 2 - 6 + 7 + 5 + 1 + 0 + 0 + 1 + 13 + 0 + 0 + 0 + 0 + 0 + 35 + 50 + 50 + 0 + 0 =1543

You can click here to view a table of pass1 calculations for all the rated players in this tournament.

Pass 2 Rating
The purpose of this pass is solely to determine ratings for unrated players. To do this, we first look at the ratings for rated players that came out of Pass 1 to determine an “Pass 2 Adjustment”. The logic for this is as follows:

  1. We calculate the points gained in Pass 1. Points gained is simply the difference between the Pass 1 Rating and the Initial Rating of a player:

    ρi2 = Pi1 - Pi0
    where,

    Symbol Universe Description
    Pi0 Pi0+ the initial rating for the i-th player. We use the symbol P and the superscript 0 to represent the idea that we sometimes refer to the process of identifying the initial rating of the given player as Pass 0 of the ratings processor.
    Pi1 Pi1+ the Pass 1 rating for the i-th player.
    ρi2 ρi2 the points gained by the i-th player in this tournament. Note here that we use the superscript 2 to denote that this value is calculated and used in Pass 2 of the ratings processor. Further, ρi2 only exists for players who have a well defined Pass 1 Rating. For Players with an undefined Pass 1 Rating (unrated players), will have an undefined ρi2.
    i i[1,732] the index of the player under consideration. i can be as small as 1 or as large as 732 for this tournament and the i-th player must be a rated player.

  2. For rated players, Pass 1 points gained, ρi2, is used to calculate the Pass 2 Adjustment in the following way:
    1. If a player gained less than 50 points (exclusive) in pass 1, then we set that player's Pass 2 Adjustment to his/her Initial Rating.
    2. If a player gained between 50 and 74 (inclusive) points in pass 1, then we set the player's Pass 2 Adjustment to his/her Final Pass1 Rating.
    3. If a player gains 75 or more points (inclusive) in pass 1, then the following formula applies:
      • If the player has won at least one match, and lost at least 1 match in the tournament, then the player's Pass 2 Adjustment is the average of his/her Final Pass 1 Rating and the average of his/her opponents rating from the best win and the worst loss, represented using the formula below:

        αi2 = Pi1 + Bi + Wi 2 2

        where αi2 is the Pass 2 Adjustment for the current player, Pi1 is the Pass 1 Rating, Bi is the rating of the highest rated opponent against which the current player won a match, and Wi is the rating of the lowest rated opponent against which the current player lost a match.
      • If a player has not lost any of his/her matches in the current tournament, the mathematical median (rounded down to the nearest integer) of all of the player's opponents initial rating is used as his/her Pass 2 Adjustment:

        αi2 = {Pk0}

        where Pk0 is the initial rating of the player who was the i-th player's opponent from the k-th match.
        Symbol Universe Description
        i i[1,732] the index of the player under consideration. i can be as small as 1 or as large as 732 for this tournament and the i-th player must be a rated player.
        q q[1,5029] the index of the match result under consideration. q can be as small as 1 or as large as 5029 for this tournament and the q-th match must be have both rated players as opponents.
        g g[1,5] the g-th game of the current match result under consideration. q can be as small as 1 or as large as 5 for this tournament assuming players play up to 5 games in a match.
        Pk0 Pk0+ initial rating of the i-th player's opponent from the k-th match.


      • Therefore, the Pass 2 Adjustment for Anthony Agpaoa is calculated as follows:
        • Given the initial rating of 1334,
        • and the Pass 1 rating of 1543,
        • the Pass 1 gain is 1543 - 1334 = 209.
        • Since the Pass 1 Gain of 209 is greater than 74, and Anthony Agpaoa has won some matches and lost some matches, the Pass 2 Rating is calculated to be the average of the Pass 1 Rating and the average of the Best win and the worst loss:

          1543 + 1735 + 1373 2 2 =1548    (mod 1)


        You can click here to view a table of Pass 2 Adjustments for all the rated players in this tournament.

  3. After calculating the Pass 2 Adjustment for all the rated players as described above, we can now calculate the Pass 2 Rating for all the unrated players in this tournament (which is the main purpose of Pass 2). Pass 2 Rating is calculated using the following formula:
    1. If all of the matches of an unrated player are against other unrated players, then the Pass 2 Rating for that player is simply set to 1200. You can click here to view these players who received a 1200 Pass 2 Rating. Not all of Anthony Agpaoa's matches were against unrated players. So this rule does not apply to him.
    2. For unrated players with wins and losses, where at least 1 of the opponents has an initial rating, the Pass 2 Rating is the average of the best win and the worst loss (using the Pass 2 Adjustment of all rated players) as defined by this formula here:

      Pi2 = Bi2 + Wi2 2

      where Pi2 is the Pass 2 Rating for the i-th player, Bi2 is the largest Pass 2 Adjustment (best win) of the opponenet against whom the i-th player won a match, and Wi2 is the smallest Pass 2 Adjustment (worst loss) of the opponent against whom the i-th player lost a match.
    3. For unrated players with all wins and no losses, where at least 1 of the opponents has an initial rating, the Pass 2 Rating is calculated using the following formula:
      Pi2 = Bi2 + k=0Mi-1 I(Bi2-αk2)
      where the function I(x) is defined as, \begin{equation} I(x)=\left\{ \begin{array}{ll} 10, & \text{if}\ x >= 1, x <= 50 \\ 5, & \text{if}\ x >= 51, x <=100 \\ 1, & \text{if}\ x >= 101, x <= 150 \\ 0, & \text{otherwise} \end{array}\right. \end{equation}
      where,
      Symbol Universe Description
      Pi2 Pi2+ the pass 2 rating, of the i-th player in this tournament only applicable to unrated players, where Pi0 is not defined
      Bi2 Bi2+ the largest of the Pass 2 Adjustments of opponents of the i-th player against whom he/she won a match.
      αk2 αk2+ the Pass 2 Adjustment of the player who was the opponent of the i-th player in the k-th match
      I(x) I:+ a function that maps all integers to one of the values from -- 0, 1, 5, 10.
      Mi Mi+ total number of matches played by the i-th player in this tournament
      k k[0,Mi-1]+ The index of the match of the i-th player ranging from 0 to Mi-1
    4. For unrated players with all losses and no wins, where at least 1 of the opponents has an initial rating, the Pass 2 Rating is calculated using the following formula:
      Pi2 = Wi2 + k=0Mi-1 I(Wi2-αk2)
      where I(x) is defined above and,

      Symbol Universe Description
      Pi2 Pi2+ the pass 2 rating, of the i-th player in this tournament only applicable to unrated players, where Pi0 is not defined
      Wi2 Wi2+ the smallest of the Pass 2 Adjustments of opponents of the i-th player against whom he/she lost a match.
      αk2 αk2+ the Pass 2 Adjustment of the player who was the opponent of the i-th player in the k-th match
      I(x) I:+ a function that maps all integers to one of the values from -- 0, 1, 5, 10.
      Mi Mi+ total number of matches played by the i-th player in this tournament
      k k[0,Mi-1]+ The index of the match of the i-th player ranging from 0 to Mi-1
    5. For the rated players, all the work done in Pass 1 and Pass 2 to undone and they have their ratings reset back to their initial ratings while the unrated players keep their Pass 2 Adjustment as their final Pass 2 Rating. Since Anthony Agpaoa is a rated player, his Pass 2 Adjustment of 1548 will be ignored, along with him Pass 1 Rating of 1543 and his Pass 2 Rating will be set to his initial rating of 1334 with which he came into this tournament.


Click here to see detailed information about the Pass 2 Ratings of all the other players in this tournament.

Pass 3 Rating
Any of the unrated players who have all wins or all losses are skipped in Pass 3. Since Anthony Agpaoa has an initial rating of 1334, he is not an unrated player, and therefore this rule does not apply to him. You can click here to view list of all the players that are skipped in this Pass 3.

Pass 3 Rating is calculated using 2 steps described below:
  1. In the first part of Pass 3, we apply the point exchange table described in Pass 1 above except this time by using all the players' Pass 2 Ratings. Looking at Anthony Agpaoa's wins and losses and applying the point exchange table, gives us the following result:
    Anthony Agpaoa's Wins
    Winner Loser
    Point Spread Outcome Gain Player USATT # Rating Player USATT # Rating
    357 EXPECTED 0 Anthony Agpaoa 91933 1334 Andrey Borovik 82779 977
    39 UPSET 13 Anthony Agpaoa 91933 1334 Mickey Boyle 93264 1373
    5 UPSET 8 Anthony Agpaoa 91933 1334 Ching H Wang 88854 1339
    53 UPSET 13 Anthony Agpaoa 91933 1334 John F. Mcfadden 29798 1387
    78 UPSET 16 Anthony Agpaoa 91933 1334 Jamo Parrish 75310 1412
    315 EXPECTED 0 Anthony Agpaoa 91933 1334 William Reuter 97348 1019
    190 EXPECTED 1 Anthony Agpaoa 91933 1334 Graham Matthews 5896 1144
    160 EXPECTED 2 Anthony Agpaoa 91933 1334 Kae Sun Lee 98081 1174
    13 EXPECTED 7 Anthony Agpaoa 91933 1334 Sandy Lechtick 95019 1321
    73 EXPECTED 5 Anthony Agpaoa 91933 1334 Mohan Prasad Vallabhapurapu 73410 1261
    227 EXPECTED 1 Anthony Agpaoa 91933 1334 Lola Kelsey 65637 1107
    230 EXPECTED 1 Anthony Agpaoa 91933 1334 Taran Tummala 93278 1104
    53 UPSET 13 Anthony Agpaoa 91933 1334 John F. Mcfadden 29798 1387
    184 UPSET 35 Anthony Agpaoa 91933 1334 Ajitesh Parthasarathy 91789 1518
    401 UPSET 50 Anthony Agpaoa 91933 1334 Tina Chen 88191 1735
    298 UPSET 50 Anthony Agpaoa 91933 1334 Brian C Riley 47621 1632