A great strategy game. And no, it's not luck. The rules are explained in the game. Anyone can calculate what impact their next move will have if their brain is fast enough, or if they have the spare time to do it.
I'll be honest: I'm smart, but not THAT smart. Nor do I have the time to calculate all of my moves. When it comes down to the wire, I'm just blindly guessing, hitting whatever will explode and looks like it'll spread. But I promise, it's not luck.