[CoolNard]

The fact that Kira is able to gain access to police information doesn't only mean he has access to police files. It could also mean the possibility of him having planted some sort bug in the office so as to enable him to hear what was going on. And why couldn't Kira possibly have known about it? He found out about the director didn't he? How famous the hostages were doesn't matter if we're talking about accessing infomation here. So what if the director is a public figure? If the infomation was only between the police and Mello, that is irrelevant. Point is, killing Sayu wouldn't make Light any more suspicious.

He planned it because he was confident Rem would kill L. He knew Rem's way of thinking. There was no flaw in his plan with regards to that. Hoping = taking risks, and Light certainly didn't take any risks on that one. Everything went in accordance to his plan. Find out clues.. investigate... Talk to people... That's what I would do. This has nothing to do with the supernatural because L had already known about the shinigami. What he didn't know was the relationship between Rem and Misa, which I daresay isn't supernatural at all.
Also, it's not as if Light gave much of anything to L and furthermore, it is obvious Light is smarter than both Rem and Misa put together. So the only reason L did not find out about their relationship was because of Light's advanced planning ahead - making sure L died asap as well.

Uhhh... Not really. I'd say there's a chance L would have won if we took your "if" theory into consideration, but then, taking mine into consideration, it cancels out yours by a fair margin. Basing it on your reply, I can also question what else you could have said besides "if". I'm merely giving you a taste of your own medicine. What's done is done, "if" is only an excuse, apart from learning from your mistakes, which is quite impossible becuz in this case, L is dead.
Ahh... yes, Light had some help, from Rem mainly. But we can't say it was assistance because Rem wasn't the type who would willingly obey Light. In fact, she had threatened to kill him at one point. So you wanna bring assistance in? L had the police force. L also had Watari. Not to mention Light when he had lost his memory. Who do you think had more help?

I pointed out the obvious becase you did... It isn't necessary to outsmart someone who doesn't pose much of a threat, because you know there is nothing he or she can do against you in the first place.