Put simply, there's two main things that affect how much a rating changes. The first is how much of a difference there is between the two players' ratings. Beating someone rated far below you will give you fewer points than beating someone of your own rating. Similarly, beating someone with a much higher rating will give you even more points than that. Something similar happens when you lose. The lower the person's rating that you lose to, the more points will be deducted from your rating.
The second thing is something called RD (Rating Deviation). Put simply, that number is a measure of how accurate the rating is. If you have a large RD, then your rating isn't very accurate - maybe you haven't played in a while or have performed counter to what your rating would indicate (beating someone higher rated or losing to lower rated players). If this is the case, then larger changes are to be expected - to try to get your rating more accurate more quickly. On the other hand, if your opponent has a large RD, then your rating won't change as much. After all, if the site isn't really sure about your opponent's rating, then your shouldn't be punished for an unexpected loss or unduly rewarded for an unexpected win.
So, the actual change of rating is based not only on the result of the game, but also your rating, your opponent's rating, your RD, and your opponent's RD.
why is scoring in live chess so inconsistent i have won ever which way you can even with the childish four move's but when i lose i always lose more points than i've gained very confusing cant find scoring system on the sit please help put me out of my misery ?????????????????????????????????