This gist is for round robin and Single Eliminaiton rules formulas

sporting macthes elimination formulas

***** round robin macthes ***** 
(Even number participants)
----------
n = no of participants
matches = n(n-1)/2
rounds = n-1
byes = 0

Eg. 
participants = 10
matches = 10(10-1)/2 = 45
rounds = 10-1 = 9
byes = 0

(Odd number participants)
---------------------
n = no of participants
matches = n(n-1)/2
rounds = n
byes = 0

Eg. 
participants = 7
matches = 7(7-1)/2 = 21
rounds = 7
byes = 0


***** single eliminaiton macthes ***** 
n = no of participants
matches = n-1
rounds = 2^x = x
byes = n-2^x

Eg 1.
participants = 6
matches = 6-1 = 5
rounds = 2^3 = 3 **(6<(8=2^3))**
byes = 8-6  = 2


Eg 2.
participants = 9
matches = 9-1 = 8
rounds = 2^4 = 4 **(9<(16=2^4))**
byes = 16-9  = 5