When you create a game through match-making, the server finds other players who are looking to play. Instead of matching you with a random opponent, our match-maker will try to find opponents of a similar Credit rank to you, ensuring a fairer game.
However, it may not always be possible to find opponents of a similar Credit rank. If there are not enough players of an appropriate Credit rank online and waiting in a queue, the game may match you with players of higher or lower ranks. If you are consistently being matched with players who are too difficult or too easy for you, you may want to try queuing at different times of the day.