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Diffstat (limited to 'doc/results.txt')
| -rw-r--r-- | doc/results.txt | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/doc/results.txt b/doc/results.txt index c353368..13a56f3 100644 --- a/doc/results.txt +++ b/doc/results.txt @@ -21,14 +21,21 @@ Specific rules regarding Elo implementation for this application's purposes: * no minimum rating limit for driver is enforced * drivers are rated from their first entry (there's no initial grace period) * shared drive entries have the effective ranking equal to the average ranking of drivers sharing the drive; pending ranking points from duels of such entries are divided equally between drivers sharing the drive + * driver group disparity is varied to accommodate for dynamic shifts of relative performance within the F1 field (caused by technical changes) - see below Other than that, standard Elo rating conventions apply: * drivers start with identical initial rating * duels between high-ranked drivers change their rankings by fewer points than duels between low-ranked drivers +Field disparity change: + * higher disparity leads to more rating inflation - as disparity is a measure of rating difference that yields a certian probability of driver's victory, so higher disparity leads to more attribution for a victory to a driver (and less attribution to the shift of performance, e.g. car performance change) + * higher rating deviation in the months prior to a race suggests a shift in relative performance (some drivers gain a lot, some divers lose a lot), so there's a need for damping further changes a bit - by lowering disparity + * once the ratings are stabilized (meaning relative performance within the field had settled), disparity can be increased + * this helps with the initial "rolling start" phase of the ranking (1946-1949 races) + Specific parameters which are configurable: * initial driver ranking - * disparity factor (ranking difference which drops the possibility of lower-ranked driver's win by the factor of 10) + * initial disparity factor (ranking difference which drops the possibility of lower-ranked driver's win by the factor of 10) * duel importance (base, i.e. for drivers ranked below importance thresholds) for all race types * importance thresholds (for 50% of base importance and 75% of base importance) |