Simply Compete Logo
for
Qi Cai

USATT#: 223588

Introduction
This page explains how Qi Cai (USATT# 223588)'s rating went from 1392 to 1573 at the 888 TTC $15K Butterfly / XIOM Labor Day Challenge held on 3 Sep 2021 - 6 Sep 2021. 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 Qi Cai for this tournament.

Initial Rating Pass 1 Pass 2 Pass 3 Final Rating (Pass 4)
1392 1491 1392 1516 1573


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 170 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 888 TTC $15K Butterfly / XIOM Labor Day Challenge held on 3 Sep 2021 - 6 Sep 2021 for Qi Cai, and its source tournament are as follows:
Initial Rating From Tournament Start Day End Day
1392 ICC JOOLA Fall Open 2021 28 Aug 2021 29 Aug 2021

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

Qi Cai's Wins
Winner Loser
Point Spread Outcome Gain Player USATT # Rating Player USATT # Rating
890 EXPECTED 0 Qi Cai 223588 1392 Brandon Ge 217848 502
54 EXPECTED 6 Qi Cai 223588 1392 Shriraam Velayutham 223760 1338
716 EXPECTED 0 Qi Cai 223588 1392 Vivaan Chandra 1170374 676
4 EXPECTED 8 Qi Cai 223588 1392 Janset Aykanat 95906 1388
366 UPSET 50 Qi Cai 223588 1392 Tae-Hyun Kim 86341 1758
264 UPSET 50 Qi Cai 223588 1392 Vishruth Dinesh 269658 1656
81 EXPECTED 5 Qi Cai 223588 1392 Barbara Clark 89272 1311
700 EXPECTED 0 Qi Cai 223588 1392 Lucia Sun 230237 692
1392 EXPECTED 0 Qi Cai 223588 1392 Aarav Desai 269570 0
330 EXPECTED 0 Qi Cai 223588 1392 Weizhe Zhang 214782 1062
317 EXPECTED 0 Qi Cai 223588 1392 Ryan Blanton 222118 1075
0 0 Qi Cai 223588 0 Nikhil Chawla 256412 0
625 EXPECTED 0 Qi Cai 223588 1392 Ziyue Zhou 270726 767
930 EXPECTED 0 Qi Cai 223588 1392 Varin Chandra 1170751 462

Qi Cai's Losses
Winner Loser
Point Spread Outcome Loss Player USATT # Rating Player USATT # Rating
307 EXPECTED -0 Alex Storm Piech 201855 1699 Qi Cai 223588 1392
400 EXPECTED -0 Triet Kha 212847 1792 Qi Cai 223588 1392
443 EXPECTED -0 Steven Tse 229507 1835 Qi Cai 223588 1392
560 EXPECTED -0 Anay Shiledar 928112 1952 Qi Cai 223588 1392
588 EXPECTED -0 Bosman Botha 219904 1980 Qi Cai 223588 1392
160 EXPECTED -2 Giovanni Greaves 84300 1552 Qi Cai 223588 1392
242 EXPECTED -0 Hanyao Zhang 1165422 1634 Qi Cai 223588 1392
307 EXPECTED -0 Alex Storm Piech 201855 1699 Qi Cai 223588 1392
385 EXPECTED -0 Emma Liao 1132473 1777 Qi Cai 223588 1392
185 EXPECTED -2 Sherman Chen 220801 1577 Qi Cai 223588 1392
70 UPSET -16 Mihir Joshi 219732 1322 Qi Cai 223588 1392

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 Qi Cai 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 Qi Cai:

Initial Rating Gains/Losses Pass 1 Rating
1392 + 0 + 6 + 0 + 8 + 0 + 0 + 0 + 0 + 0 + 50 - 2 + 0 + 0 + 0 - 2 + 50 + 5 + 0 - 16 + 0 + 0 + 0 + 0 + 0 + 0 =1491

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[1,170] the index of the player under consideration. i can be as small as 1 or as large as 170 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[1,170] the index of the player under consideration. i can be as small as 1 or as large as 170 for this tournament and the i-th player must be a rated player.
        q q[1,971] the index of the match result under consideration. q can be as small as 1 or as large as 971 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 Qi Cai is calculated as follows:
        • Given the initial rating of 1392,
        • and the Pass 1 rating of 1491,
        • the Pass 1 gain is 1491 - 1392 = 99.
        • Since the Pass 1 Gain of 99 is greater than 74, and Qi Cai 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:

          1491 + 1758 + 1322 2 2 =1515    (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 Qi Cai'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 Qi Cai is a rated player, his Pass 2 Adjustment of 1515 will be ignored, along with him Pass 1 Rating of 1491 and his Pass 2 Rating will be set to his initial rating of 1392 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 Qi Cai has an initial rating of 1392, 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 Qi Cai's wins and losses and applying the point exchange table, gives us the following result:
    Qi Cai's Wins
    Winner Loser
    Point Spread Outcome Gain Player USATT # Rating Player USATT # Rating
    890 EXPECTED 0 Qi Cai 223588 1392 Brandon Ge 217848 502
    54 EXPECTED 6 Qi Cai 223588 1392 Shriraam Velayutham 223760 1338
    716 EXPECTED 0 Qi Cai 223588 1392 Vivaan Chandra 1170374 676
    4 EXPECTED 8 Qi Cai 223588 1392 Janset Aykanat 95906 1388
    366 UPSET 50 Qi Cai 223588 1392 Tae-Hyun Kim 86341 1758
    264 UPSET 50 Qi Cai 223588 1392 Vishruth Dinesh 269658 1656
    81 EXPECTED 5 Qi Cai 223588 1392 Barbara Clark 89272 1311
    700 EXPECTED 0 Qi Cai 223588 1392 Lucia Sun 230237 692
    1392 EXPECTED 0 Qi Cai 223588 1392 Aarav Desai 269570 0
    330 EXPECTED 0 Qi Cai 223588 1392 Weizhe Zhang 214782 1062
    317 EXPECTED 0 Qi Cai 223588 1392 Ryan Blanton 222118 1075
    0 0 Qi Cai 223588 0 Nikhil Chawla 256412 0
    625 EXPECTED 0 Qi Cai 223588 1392 Ziyue Zhou 270726 767
    930 EXPECTED 0 Qi Cai 223588 1392 Varin Chandra 1170751 462

    Qi Cai's Losses
    Winner Loser
    Point Spread Outcome Loss Player USATT # Rating Player USATT # Rating
    307 EXPECTED -0 Alex Storm Piech 201855 1699 Qi Cai 223588 1392
    400 EXPECTED -0 Triet Kha 212847 1792 Qi Cai 223588 1392
    443 EXPECTED -0 Steven Tse 229507 1835 Qi Cai 223588 1392
    560 EXPECTED -0 Anay Shiledar 928112 1952 Qi Cai 223588 1392
    588 EXPECTED -0 Bosman Botha 219904 1980 Qi Cai 223588 1392
    160 EXPECTED -2 Giovanni Greaves 84300 1552 Qi Cai 223588 1392
    242 EXPECTED -0 Hanyao Zhang 1165422 1634 Qi Cai 223588 1392
    307 EXPECTED -0 Alex Storm Piech 201855 1699 Qi Cai 223588 1392
    385 EXPECTED -0 Emma Liao 1132473 1777 Qi Cai 223588 1392
    185 EXPECTED -2 Sherman Chen 220801 1577 Qi Cai 223588 1392
    70 UPSET -16 Mihir Joshi 219732 1322 Qi Cai 223588 1392

    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 for Pass 3 Part 1.

    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 Pass 2 Rating, we apply the point exchange table from above and show the rating points earned and lost by Qi Cai in the "Gain" column. Matches are divided up into two tables for wins and losses where points are "Gain"ed for the wins and "loss"ed for losses. Putting all the gains and losses together, we get the following math to calculate the rating for Qi Cai in this first part of Pass 3:

    Pass 2 Rating Gains/Losses Pass 3 Part 1 Rating
    1392 + 0 + 6 + 0 + 8 + 0 + 0 + 0 + 0 + 0 + 50 - 2 + 0 + 0 + 0 - 2 + 50 + 5 + 0 - 16 + 0 + 0 + 0 + 0 + 0 + 0 =1491


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

  2. Given the Pass 3 Part 1 rating calculated above, the second part of Pass 3 looks very similar to the part of Pass 2 that deals with rated players where we calculate their Pass 2 Adjustment.
    1. First, we calculate the points gained in Pass 3 Part 1. Points gained is simply the difference between the Pass 3 Part 1 Rating and the Pass 2 Rating of a player:

      ρi3 = pi3 - Pi2
      where,

      Symbol Universe Description
      Pi2 Pi2+ the Pass 2 Rating for the i-th player.
      pi3 pi3+ the Pass 3 Part 1 rating for the i-th player. (Note that since this is an intermediate result, we are using a lower case p instead of the upper case P that we use to indicate final result from each pass of the ratings processor.
      ρi3 ρi3 the points gained by the i-th player in this tournament in Pass 3.
      i i[1,170] the index of the player under consideration. i can be as small as 1 or as large as 170 for this tournament.

  3. Pass 3 points gained, ρi3, is then used to calculate the Pass 3 Part 2 Rating in the following way:
    1. If a player gained less than 50 points (exclusive) in Pass 3 Part 1, then we set that player's Pass 3 Part 2 Rating to his/her Pass 2 Rating.
    2. If a player gained between 50 and 74 (inclusive) points in Pass 3 Part 1, then we set the player's Pass 3 Part 2 Rating to his/her Pass 3 Part 1 Rating.
    3. If a player gains 75 or more points (inclusive) in Pass 3 Part 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 3 Part 2 Rating is the average of his/her Pass 3 Part 1 Rating and the average of his/her opponents rating from the best win and the worst loss, represented using the formula below:

        αi3 = pi3 + Bi3 + Wi3 2 2

        where αi3 is the Pass 3 Part 2 Rating for the current player, pi3 is the Pass 3 Part 1 Rating, Bi3 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 rating is used as his/her Pass 3 Part 2 Rating:
        αi3 = {pk3}

        where pk3 is the Pass 3 Part 1 Rating of the i-th player's opponent from the k-th match.

      • Therefore, the Pass 3 Part 2 Rating for Qi Cai is calculated as follows:
        • Given the Pass 2 Rating of 1392,
        • and the Pass 3 Part 1 rating of 1491,
        • the Pass 3 Part 1 gain is 1491 - 1392 = 99.
        • Since the Pass 3 Gain of 99 is greater than 74, and Qi Cai has won some matches and lost some matches, the Pass 3 Part 2 Rating is calculated to be the average of the Pass 3 Part 1 Rating and the average of the Best win and the worst loss:

          1491 + 1758 + 1322 2 2 =1515.5


      The Pass 3 Part 2 rating ends up becoming the final Pass 3 rating (also referred to as the Pass 3 Adjustment) except as follows:
      • In the cases where the Pass 3 Part 2 rating is less than the players' initial rating Pi0, the Pass 3 rating is reset back to that players initial rating. Qi Cai's Pass 3 Part 2 Rating came out to 1516. Since this value is greater than Qi Cai's initial rating of 1392, his Pass 3 Adjustment is set to his Pass 3 Part 2 Rating of 1516.

      • It is possible for the admin of this tournament to override the Pass 3 Adjustment calculated above with a value they deem appropriate. Qi Cai does not have a manually overridden value for his Pass 3 Adjustment, therefore the value remains at 1516.
      You can click here to view a table of Pass 3 Part 2 Ratings for all the players in this tournament along with any manually overridden values.

Pass 4 Rating
Pass 4 is the final pass of the ratings processor. In this pass, we take the adjusted ratings (Pass 3 Adjustment) of all the rated players, and the assigned rating of unrated players (Pass 2 Rating), and apply the point exchange table to the match results based on these ratings to arrive at a final rating. Looking at Qi Cai's match results and applying the point exchange table, gives us the following result:

Qi Cai's Wins
Winner Loser
Point Spread Outcome Gain Player USATT # Rating Player USATT # Rating
464 EXPECTED 0 Qi Cai 223588 1516 Brandon Ge 217848 1052
178 EXPECTED 2 Qi Cai 223588 1516 Shriraam Velayutham 223760 1338
840 EXPECTED 0 Qi Cai 223588 1516 Vivaan Chandra 1170374 676
32 UPSET 10 Qi Cai 223588 1516 Janset Aykanat 95906 1548
242 UPSET 50 Qi Cai 223588 1516 Tae-Hyun Kim 86341 1758
140 UPSET 30 Qi Cai 223588 1516 Vishruth Dinesh 269658 1656
205 EXPECTED 1 Qi Cai 223588 1516 Barbara Clark 89272 1311
359 EXPECTED 0 Qi Cai 223588 1516 Lucia Sun 230237 1157
990 EXPECTED 0 Qi Cai 223588 1516 Aarav Desai 269570 526
454 EXPECTED 0 Qi Cai 223588 1516 Weizhe Zhang 214782 1062
441 EXPECTED 0 Qi Cai 223588 1516 Ryan Blanton 222118 1075
301 EXPECTED 0 Qi Cai 223588 1516 Nikhil Chawla 256412 1215
699 EXPECTED 0 Qi Cai 223588 1516 Ziyue Zhou 270726 817
1054 EXPECTED 0 Qi Cai 223588 1516 Varin Chandra 1170751 462

Qi Cai's Losses
Winner Loser
Point Spread Outcome Loss Player USATT # Rating Player USATT # Rating
183 EXPECTED -2 Alex Storm Piech 201855 1699 Qi Cai 223588 1516
276 EXPECTED -0 Triet Kha 212847 1792 Qi Cai 223588 1516
319 EXPECTED -0 Steven Tse 229507 1835 Qi Cai 223588 1516
436 EXPECTED -0 Anay Shiledar 928112 1952 Qi Cai 223588 1516
464 EXPECTED -0 Bosman Botha 219904 1980 Qi Cai 223588 1516
36 EXPECTED -7 Giovanni Greaves 84300 1552 Qi Cai 223588 1516
118 EXPECTED -3 Hanyao Zhang 1165422 1634 Qi Cai 223588 1516
183 EXPECTED -2 Alex Storm Piech 201855 1699 Qi Cai 223588 1516
261 EXPECTED -0 Emma Liao 1132473 1777 Qi Cai 223588 1516
61 EXPECTED -6 Sherman Chen 220801 1577 Qi Cai 223588 1516
69 UPSET -16 Mihir Joshi 219732 1447 Qi Cai 223588 1516

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 players' Pass 3 Adjustment, we apply the point exchange table from above and show the ratings points earned and lost by Qi Cai in the "Gain" and "Loss" columns. 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 4 Rating for Qi Cai:

Pass 3 Rating Gains/Losses Pass 4 Rating
1516 + 0 + 2 + 0 + 10 - 2 + 0 + 0 + 0 + 0 + 50 - 7 - 3 - 2 + 0 - 6 + 30 + 1 + 0 - 16 + 0 + 0 + 0 + 0 + 0 + 0 =1573

You can click here to view a table of Pass 4 calculations for all the players in this tournament.