Rating detailed calculation |
The Elo rating system, named after the US physicist and mathematician Arpad Elo, is a method for calculating the relative skill levels of players. The system allows to calculate, from tables, how many games a player is expected to win based on a comparison of his rating to the ratings of his opponents. For example, if the difference in the player's ratings is no more than 3 scores the likelihood of a win or a loss is 0.5 or 50%.
Rating Calculation in Games
Rint — player’s initial rating
Rnew — player’s new rating.
dR — difference between players’ ratings.
K — the maximum possible adjustment per game (the K-value) is set at K = 10 for the strongest players (rating of 2400 and higher), K = 15 for the players with the rating lower than 2400 who played no less than 20 games, K = 25 for the novice players.
N — points actually scored in the game.
Nexp — expected score (taken from the Elo table).
Rnew = Rint + K (N — Nexp)
Rating Calculation in Tournaments
To calculate ratings in tournament, a new value is added, Rt — simple average of all the tournament participants’ ratings. dR — difference between Rint and Rt.
The Elo Table
| dR |
Nexp (Rint >) |
Nexp (Rint <) |
| 000-003 |
0,50 |
0,50 |
| 004-010 |
0,51 |
0,49 |
| 011-017 |
0,52 |
0,48 |
| 018-025 |
0,53 |
0,47 |
| 026-032 |
0,54 |
0,46 |
| 033-039 |
0,55 |
0,45 |
| 040-046 |
0,56 |
0,44 |
| 047-053 |
0,57 |
0,43 |
| 054-061 |
0,58 |
0,42 |
| 062-068 |
0,59 |
0,41 |
| 069-076 |
0,60 |
0,40 |
| 077-083 |
0,61 |
0,39 |
| 084-091 |
0,62 |
0,38 |
| 092-098 |
0,63 |
0,37 |
| 099-106 |
0,64 |
0,36 |
| 107-113 |
0,65 |
0,35 |
| 114-121 |
0,66 |
0,34 |
| 122-129 |
0,67 |
0,33 |
| 130-137 |
0,68 |
0,32 |
| 138-145 |
0,69 |
0,31 |
| 146-153 |
0,70 |
0,30 |
| 154-162 |
0,71 |
0,29 |
| 163-170 |
0,72 |
0,28 |
| 171-179 |
0,73 |
0,27 |
| 180-188 |
0,74 |
0,26 |
| 189-197 |
0,75 |
0,25 |
| 198-206 |
0,76 |
0,24 |
| 207-215 |
0,77 |
0,23 |
| 216-225 |
0,78 |
0,22 |
| 226-235 |
0,79 |
0,21 |
| 236-245 |
0,80 |
0,20 |
| 246-256 |
0,81 |
0,19 |
| 257-267 |
0,82 |
0,18 |
| 268-278 |
0,83 |
0,17 |
| 279-290 |
0,84 |
0,16 |
| 291-302 |
0,85 |
0,15 |
| 303-315 |
0,86 |
0,14 |
| 316-328 |
0,87 |
0,13 |
| 329-344 |
0,88 |
0,12 |
| 345-357 |
0,89 |
0,11 |
| 358-374 |
0,90 |
0,10 |
| 375-391 |
0,91 |
0,09 |
| 392-411 |
0,92 |
0,08 |
| 412-432 |
0,93 |
0,07 |
| 433-456 |
0,94 |
0,06 |
| 457-484 |
0,95 |
0,05 |
| 485-517 |
0,96 |
0,04 |
| 518-559 |
0,97 |
0,03 |
| 560-619 |
0,98 |
0,02 |
| 620-734 |
0,99 |
0,01 |
| 735 è áîëåå |
1,00 |
0,00 |
|
Registered players: | 41264 |
Active users: | 17 |
Players online: | 1091 |
Teams: | 44 |
Battle games played: | 162816 |
Classic games played: | 253097 |
Current battle games: | 0 |
Current classic games: | 0 |
Battle setups in database: | 63919 |
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