7 ms·

Also first click is never a mine (if there's one where you click it's moved to the top left corner).

gog 2y ago
AFAIK, it wasn't like that on Windows 3.11, it would be interesting to know when this was added.
dotancohen 2y ago
Does this mean that the top left corner had a higher probability of being a mine? Or even a lower probability, seeing as the dev would have had to ensure that it's not a mine before the user clicks. Now that I think about it, the dev strategy of leaving the spot without a mine but moving one there, probably does not affect the probability that there will be a mine there during gameplay.
- ohwellhere 2y ago
  I don't think the dev would leave the top left without a mine until one is moved there, as that would always be a safe square to click first. So if the probability of finding a mine at any given spot is given by p, then the probability of finding a mine in the top left during gameplay for cases where one does not click it first (in which case it is 0?) is 1 for the case where you clicked on a mine first with probability p, and then p for the remainder. So the total probability p' is p * 1 + (1 - p) * p, or 2p - p^2. Wikipedia says > Beginner is usually on an 8x8 or 9x9 board containing 10 mines, Intermediate is usually on a 16x16 board with 40 mines and expert is usually on a 30x16 board with 99 mines; however, there is usually an option to customise board size and mine count. 8x8 10 mines p = 0.16 p' = 0.29 ratio = 1.84 9x9 10 mines p = 0.12 p' = 0.23 ratio = 1.88 16x16 40 mines p = 0.16 p' = 0.29 ratio = 1.84 30x16 99 mines p = 0.21 p' = 0.37 ratio = 1.79 I was curious to see the concrete effects for no reason other than to procrastinate.
  - dotancohen 2y ago
    > I don't think the dev would leave the top left without a mine until one is moved there, as that would always be a safe square to click first. All squares are safe to click first, that's the point.

gog 2y ago

AFAIK, it wasn't like that on Windows 3.11, it would be interesting to know when this was added.

Does this mean that the top left corner had a higher probability of being a mine? Or even a lower probability, seeing as the dev would have had to ensure that it's not a mine before the user clicks. Now that I think about it, the dev strategy of leaving the spot without a mine but moving one there, probably does not affect the probability that there will be a mine there during gameplay.

ohwellhere 2y ago
I don't think the dev would leave the top left without a mine until one is moved there, as that would always be a safe square to click first. So if the probability of finding a mine at any given spot is given by p, then the probability of finding a mine in the top left during gameplay for cases where one does not click it first (in which case it is 0?) is 1 for the case where you clicked on a mine first with probability p, and then p for the remainder. So the total probability p' is p * 1 + (1 - p) * p, or 2p - p^2. Wikipedia says > Beginner is usually on an 8x8 or 9x9 board containing 10 mines, Intermediate is usually on a 16x16 board with 40 mines and expert is usually on a 30x16 board with 99 mines; however, there is usually an option to customise board size and mine count. 8x8 10 mines p = 0.16 p' = 0.29 ratio = 1.84 9x9 10 mines p = 0.12 p' = 0.23 ratio = 1.88 16x16 40 mines p = 0.16 p' = 0.29 ratio = 1.84 30x16 99 mines p = 0.21 p' = 0.37 ratio = 1.79 I was curious to see the concrete effects for no reason other than to procrastinate.
- dotancohen 2y ago
  > I don't think the dev would leave the top left without a mine until one is moved there, as that would always be a safe square to click first. All squares are safe to click first, that's the point.