Probability of four consecutive doubles :- 1/6 X 1/6 X 1/6 X 1/6 = 1 / 1296 Are you sayi

and another run of four doubles

Another run of four successive doubles Why does this occur as often as it does?  

And again - four doubles in the take off alone given that the probablity of a double in backgammo

And again - same sequence