Quote from: TheKomodo on December 29, 2016, 12:14 PM
Remember it's ELO system, so you are taking points from your opponent, or losing them to your opponent.
So if you draw, well, technically nothing would happen?
No, that's not how the Éló system works. Basically, it uses a formula to determine from your rating and your opponents rating what your predicted result would be (anything in between 0 and 1). It then deducts that from the score you actually got and multiplies that with a fixed number (different for every league, it's called the K factor). The number you get then if the change in your rating.
Example (let's take a K factor of 30, which is standard in chess - I'm guessing TUS uses a higher number)
If I were to play against a really good player, the expected result would be 0.12 (in 100 games, I'd win 12 and lose the rest, so to speak).
I win: 1-0.12 = +0.88, so the rating change will be 30*0.88 = +26.4
I lose: 0-0.12 = -0.12, so the rating change will be 30*-0.12 = -3.6
I draw: 0.5-0.12 = +0.38, so the rating change will be 30*0.38 = +11.4
The opponent's expected result would be 0.88, so you can do the same calculations to get to that person's rating change:
I win: 30*(0-0.88)= -26.4
I lose: 30*(1-0.88) = +3.6
I draw: 30*(0.5-0.88) = -11.4
The bigger the k factor, the bigger the rating change will be (though considering every calculation uses the same k factor, it doesn't really matter how high it is)