[quote][b]Posted by:[/b] SAMIUL93 nice explanation, but one time i lost skill for WINNING, can u explain that for me plz [/quote] Because your sigma dropped...remember it drops even when you win. Probably didn't gain much if any MU from whoever you beat, likely do to poor matchmaking quality. You would have been on the brink between levels, and the sigma change might have rounded your rank down.