1. How do compete for ranking?  
2. What are the conditions for a ranked game?  
3. What do the different colors before someones name mean?  
4. What kind of ranking system is used?  
5. How does the ranking calculation work?  
6. Can you give me an example calculation?  
7. What is the grade point ranking?  
8. How does the Allround ranking work?  
9 Why did I get a warning not to play my friends in a ranked lobby?  
10 Why did I loose my ranking points (at start of month)  
11 Will I get more ranking points for exceeding the point limit?  
12. Stranger Rule: Why can't I play a certain opponent?  
13. How does the 2 vs. 2 clan war ranking work?  
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6. Can you give me an example calculation?

Xplorers to 15JohnTim
Game Score 169
Current Ranking Score 150120
Game Count 305
First cap the scores to the max-points and normalise to 100:
Score John = min( points , maxPoints ) / maxPoints * 100 = 15 / 15 * 100 = 100
Score Tim  = min( 9 , 15 ) / 15 * 100 = 9 / 15 * 100 = 60

Now calculate John's score:
A) win-lose-factor:		
	WLF = +1	(John won, so he RECEIVES points)
B) diff-opponent-factor:
	They played each other 1 time before so opponentCount = 1
	gameCount > 10, so:
	DOFa = opponentCount / gameCount - 0.1 = 1 / 30 - 0.1 = 0.03 - 0.1 = -0.07
	This value should always fit in the range of 0 - 0.5 (min-max( 0 > DOF < 0.5 ) = 0
	DOF = 1 - 0 * 2 = 1  (so this is optimal)
C) diff-ranking-factor:
	DRFa = ranking John - ranking Tim   = 150 - 120 = 30
	DRFb = min-max( -250 > DRFa < 250 ) = 30
	DRF  = (250 - DRFb) / (2*250) = (250 - 30) / 500 = 220 / 500 = 0.44
D) diff-score-factor:
	DSFa = score John - score Tim = 100 - 60 = 40
	DSF = min-max( 0 > DSFa < 50 ) = min-max( 0 > 50 < 50 ) = 40

Score John = WLF * DOF * DRF * DSF = +1 * 1 * 0.44 * 40 = +18 ranking points

Now calculate Tim's score:
A) WFL  = -1 (Tim lost so LOSES points)
B) DOFa = 1 / 5 - 0.1 = 0.2 - 0.1 = 0.1
   DOF  = 1 - 0.1 * 2 = 0.8
C) DRFa = 120 - 150 = -30
   DRFb = 30
   DRF  = (250 + 30) / 500 = 0.56 
	( note: 0.56 (DRF Tim) + 0.44 (DRF John) = always 1 )
D) DSFa = 80 - 130 = -50
   DSF  = absoluut( -50 ) = 40
	(note: always equal for both players)

Score Tim = WLF * DOF * DRF * DSF = -1 * 0.8 * 0.56 * 40 = -18 ranking points
	(note: In most cases the ranking points are the negative of each other)