Talk:Lucky Spin/@comment-44337082-20191110162141

• At the beginning of the game, a diamond shows up about 3% of the time on each reel. I wrote down the pattern I got 100 times and found a diamond on the first reel 3 times, a dimaond on the second reel 3 times, and a diamond on the third reel 2 times. I figure the odds are 3% per reel. if you assume the result on each reel are independent, the probability of getting three diamonds [a.k.a. lucky spin] is p = (3%)^3 = (0.03)^3 = 0.03 * 0.03 * 0.03 = 0.000027 = 0.0027%. The probability of not getting a lucky spin is q = 1 - p = 0.999973 = 99.9973%. The probability of not getting a lucky spin after 51,298 spins [N = 51,298] is Q = q^N = 0.999973^51298 = 0.250308. Therefore, the probability of getting at least one lucky spin after 51,298 spins is P = 1-Q = 0.749692 = 74.9692%. Witn N = 85,187, P goes up to 90%. Those high spin levels correspond to months or years of play (50 spins per game, 2 games per day). I was about to give up [didn't like the game that much...], until I figured out there is a change in odds once you reach a certain threshold.

• I am highly confident that the odds change after you reach a certain threshold. In other words, if you survive a certain number of waves, there is a bias towards the game granting you a lucky spin. At that point you will see three diamonds, one of each reel, travel together in a single line. It will probably pass by a few times first before coming up for a win, but it will happen. This happened to me after a few days.

• The moral of the story is that if you concetrate on survival and destroy a lot of zombies you should easily get this achievement after playing a few times. That being said, if you rush through and either get a lot of sun fast or just spin through and lose, you will probably take a long time to get the achievement or never get it.

• Oh yeah, don't worry about losing after you get a lucky spin because you can still get the achievement if the zombies reach the left side and eat your brains. That's what happened on Android during the game I played.

• Good Luck!