User blog:Jens Ingels/The Breeding System: The Earning Rate

Earning rate is an calculation value in dragon city that is used to increase you chance for dragons that are located inside an dificulty. Currently all dragon exept for exclusive are located inside an dificulty.

Rate Calculation
Every dragon has an sertain amount of earning/minute that will increase when you level him. Well when you count both of those earnings together you will form the rating.

Example: Terra Dragon level 15 + Flame Dragon level 13  =

Dificulty and Slots
In total their are 33 slots where the array list can list dragon to. On default only 3 of those slots are unlocked. 1 for every existing dificulty. We like to display this easy like this: 1:1:1.

In order to unlock other slots, you will need an certain amount of rating:
 * 50,5,5,5,5,5,5,5,5,5 (so if your rating is 95 or higher, all dificulty 1 slots will be unlocked)
 * 50,20,20,20,20,20,20,20,20,20 (so if your rating is 230 or higher, all dificulty 2 slots will be unlocked)
 * 100,100,100,100,100,100,100,100,100,100 (so if your rating is 1000 or higher, all dificulty 3 slots will be unlocked)

So in our previous example we had 215. This mean all our dificulty 1 slots will already be unlocked and so if the dragon is located in dificulty 1 than our chance would only decrease if we would train our dragons higher.

To give an easy to display result we would have this: or maxed dificulty 1, 10/11 slots of dificulty 2 and 3/11 slots of dificulty 3.

Array List to slots (random factor)
Now you check on the array list in what dificulty these dragons are in. In this case their only are 2 dificulty 2 dragon. So we are lucky, we can removed dificulty 1 and dificulty 2 from the list.


 * Dificulty 2 (10 slots unlocked)

''Note: I just made an 50/50 example, can never known with an random factor. If your lucky than 7/3 slots are filled with volcano dragons. It all depense on luck.''

The system will randomly pick an dragon from the unlocked slots (in this case 10). So in theory you have an equal chance to get volcano or flaming rock dragon.