Board for everybody who is interested in BrainKing itself, its structure, features and future.
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If you mean in Chess: Your opponent's rating was about 1650 so you'll get 2050 from those two games. Keep winning and you'll end up somewhere near #100. But any losses will pull you down. If you found the games easy then you might like to challenge someone at 1800 or higher, or go for a biggie from the top 100. ;-)
The provisional rating appears after the 4th game in each game type so another couple of ganmes of Chess and Backgammon should do the trick.
And, yep, just pick someone who sounds interesting or nice, or whatever, and invite them. You might want to go to their profile and click their Started Games pages. Many of the people with several hundred games going at once will take a long time to play a match with. Those with a few games are likely to be speed players. There's an informal club called the Quick Players Club. Most of the people listed therein will play at a decent speed.