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We haven't consider that the player is a newbie which lets assume that is not familiar with teams, sports and sports betting how would he analyze it if he doesn't have any knowledge about it? I think the best is the casino games such as slots, roulette and dice game which has a very simple rules that even newbie can understand.
You`re right and casino games are easy for start, there are lots of easy guides for every situation, that can minimize the loses. But there is one more moment. In sport gambling the gambler can get knowledge and analyze sport results. And in the casino he have just strategy from the manual and depends on luck, without any analyze before gambling.