First there is four basic ways to win at chess!
1. Checkmate!
2. Opponent Resigning!
3. Opponent running "out of time"! Here at Chess.om you do not need to call time, if you set the game parameter to automatically claim win via opponent running out of time, by default its set to claim win right away!
4. Only in schedule tournament or Championship match game! Forfeit! Opponent fails to show to play and runs out time "see item 3"
As for how long it takes to win, moves, or time it does not matter just the above ways count for a win.
Now there is "six ways to draw", see
http://www.chess.com/learn-how-to-play-chess.html#draws
Hmm, this what Chess.com says includes details of how rating formula works!
Quote!
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So I know the rating of your opponent affects your rating but does the fashion in which you win? The time it takes you to win/lose? Timeouts? Resignations? How many factors are there?