How to set custom rules like difficulty level for GameCenter to find match

How to set custom rules like difficulty level for GameCenter to find match

References

Reference NO 1

http://stackoverflow.com/questions/13588628/how-to-set-custom-rules-like-difficulty-level-for-gamecenter-to-find-match

Reference NO 2

http://stackoverflow.com/questions/5702039/how-to-run-iphone-gamecenter-app-from-my-app

Reference NO 3

http://stackoverflow.com/questions/6544321/can-game-centers-leaderboards-support-a-skill-level-like-system

Reference NO 4

http://stackoverflow.com/questions/16022191/gamecenter-match-by-locale

Reference NO 5

http://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/GameKit_Guide/LeaderBoards/LeaderBoards.html

Reference NO 6

http://www.edge-online.com/features/gamed-center-whos-responsible-for-hacking-ios-game-leaderboards-and-why-do-they-do-it/

Reference NO 7

#EANF#

Reference NO 8

#EANF#