User blog comment:Zhuwawagu/Is jackpot really rigged/pre-determined? (4 jackpots in one chance time)/@comment-27783730-20160328195606

I always start from the center spot, then extend on both sides equally to scratch the whole line. It removes one factor of rng if you keep your choices the same at least.

Also, if I hit a jackpot, I'll always scratch the same place again first, then continue my pattern. JP does change place, but to my experience, it'll appear in the same spot almost half the time.