@admin: I am wondering how the rating for long contests is computed in case of ties. Specifically, I am interested in the case of the recently ended May 2014 long contest, where me and @aawisong where tied on the first place.
I know that in the rating formula there is a (weighted) component equal to the number of contestants / rank. Since there were about 5000 contestants and my rank and @aawisong’s rank were 1, I would have expected our rating to increase by something between 4000-5000 points (or more for @aawisong, since his rating before the contest was lower).
However, my rating increased only by about 3100 points, while @aawisong’s rating increased by about 3700 points (it is normal for his rating increase to be higher, since he started from a lower rating than me before the contest). These values suggest to me that the value of the rank considered for both of us in the rating formula was not 1, but probably something between 1 and 2. Is this correct? If it is, can I know what rank is considered for each user in the rating formula in case of ties ? (e.g. if there are 10 people with equal scores on the 1st place, will rank 1 be considered for each of them or some other value larger than 1 ?)