Bernice: Is this the first time in the 13 years you are a member that this happens? As I have quite a few dice games running, I have noticed it happen on occasions and if you couple that with the selective memory we humans have, it makes quite an impression when it does.

ThunderGr: yes this is the first time it has happened to me - 3 times....I have had many 2 times but this is first time for 3 times :)

Bernice: Math: Chances for a triple sequence of x-y, x-y, x-y is (1:18)^2 = 1:384 = 0.3% [first roll is anything, second roll has a chance of 1 in 18 to match (as you wouldn't see a difference between 1-5 and 5-1), third roll another 1 in 18].
That means that you should see that about every 384 sequences of three rolls. If you play only 10 games in parallel and make four moves in each per day, you should see that every 9.5 days.
It doesn't matter if the identical rolls are in the same game or different ones, as the assumption is that they are random anyway.

On the other hand, there were many discussions about the bad randomness on BrainKing (and no, we do not want to hear it all over again, please). But your experience is hardly uncommon.

Even *four* times the same roll in sequence should happen twice a year. And *five* times the same roll in sequence about once every 9 years.

Aganju: thanks....I just wondered if it was at all uncommon but you have pointed out it isnt :)

Bernice: at me it happened a lot of times, but in relation to the amount of games i played it happened rarely... it can happen sometimes i just guess... in real life i rolled 5 times in a row double-1 and i through the dices in different ways, very funny but only one time...