The system is designed to reflect a player's strength at a given point in time, relative to the strongest player. In other words, if the esteemed Vitaly (also known as Kamikaze) played better (and he could have played better, as he showed an improvement in his rating in the previous tournament), then his rating wouldn't have decreased. So, the rating works like this: the first time you play, you set an "initial" benchmark, and then the results are compared to that benchmark (depending on the quality of your game relative to the strongest player in that mini-tournament). Therefore, it's possible for the rating to both increase and decrease, which adds intrigue.
Sincerely, K0Lb@zzeR.
I understand everything, but it seems that I just need to play the first tournament better than everyone else, and then not play at all, and I'll be a super-duper leader in the rating :cool: