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Chess Directory

Test Rating Increase, Rating Change, and Opponents' Average with the FIDE Players' Database

1. The Elo results of chess tournaments are submitted to FIDE. FIDE recalculates the Elo results and make corrections if any mistake.

2. Then FIDE put the Elo results into the FIDE Players' Database which is updated in January, April, July, and October. For each FIDE Chess Player.

3. The Test idea is simple: Just open the FIDE Players' Database and find the latest Elo calculation for any FIDE Chess Player you know.

4.The following is a short example from the FIDE Players' Database. The real names are changed for Player A, Player B, Player C, and Player D.

October 2008 Calculations Archive
Player A Total change: 6.6

IRT 82 Aniv Club PosadasPosadas, MisionesARG2008-08-08
RcRownchangeKK*chg
19992012230.44156.60
Player B1882ARG110.32154.8
Player C2028PAR110.52157.8
Player D2086PAR01- 0.415- 6
5. For the Test purposes, read the above example as follows:
- Recalculated by FIDE as of October 2008.
- Elo results of Player A (rated 2012, K-factor 15) for the 3-game chess event:
Rating Increase: 0.44; Rating Change: 6.60; Opponents' Average: 1999.
- Elo results of Player A for 1 game with Player B (rated 1882, K-factor 15),
Player A scored 1 (w):
Rating Increase: 0.32; Rating Change: 4.8; Opponents' Average: 1882.
- Elo results of Player A for 1 game with Player C (rated 2028, K-factor 15), Player A scored 1 (w):
Rating Increase: 0.52; Rating Change: 7.8; Opponents' Average: 2028.
- Elo results of Player A for 1 game with Player D (rated 2086, K-factor 15), Player A scored 0 (w):
Rating Decrease: -0.4; Rating Change: - 6; Opponents' Average: 2086.

6. Test Chess Calculator for the Elo results of Player A for the whole 3-game event as follows:
- Type: for Rating of Opponent 1: 1882 (Player B)
           for Rating of Opponent 2: 2028 (Player C)
           for Rating of Opponent 3: 2086 (Player D)
- Type for Player’s Rating:    2012 (Player A)
- Type for Player’s Score:     2 (w) (Player A)
- Type for Number of Games: 3 (n) (Player A)
- Select Player’s K-factor: 15 (K) (Player A)
- Click Calculate or press ENTER and Chess Calculator must display:
Increase: 0.44 (change)
Rating Change: 6.60 (K*chg)
Opponents’ Average: 1999 (Rc) [Real: 1999] (see table)

7. Test Chess Calculator for the Elo results of Player A for 1 game with Player B as follows:
- Type: for Rating of Opponent 1: 1882 (Player B)
- Type for Player’s Rating:    2012 (Player A)
- Type for Player’s Score:     1 (w) (Player A)
- Type for Number of Games: 1 (n) (Player A)
- Select Player’s K-factor: 15 (K) (Player A)
- Click Calculate or press ENTER and Chess Calculator must display:
Increase: 0.32 (change)
Rating Change: 4.80 (K*chg)
Opponents’ Average: 1882 (Rc) [Real: 1882] (see table)

8. You are welcome to test more with the original FIDE data.

9. You can find the link to FIDE Players' Database by clicking Chess links.

10.To see how the FIDE calculation system works, click Elo Calculation.		Home



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