*enter BBW again*

... speaking of ratings again, something that has always annoyed me is a rating is calculated from the rating at the time the game ends.

So lets say you are rated 1500 and start a games with someone rated 2000. But by the time the game is complete, his rating drops to 1000. Now you rating will not raise as much as if he was the 2000 rated person you started the game with.

In live games (where most ratings come from), this is not a problem since games are usually started and completed at the same time so rating never has a chance to change.

May I ask why ratings are figured this way and not using the rating the person had when they started the game?