Dislikedhi Rcwso
however i might think i understand, a picture is worth 1000 words,,if u get a chance would be nice to c it in a print :-)Ignored
The yellow numbers are the first 123. The orange numbers are the second 123. you notice the yellow 3 forms the 1 (orange) of the next 123. It triggered there. But you will notice it actually formed another 123 and then ran downhill. you would not have been stopped out on the orange 123 had you entered there or waited for the final 123. I actually entered on the 3rd 123 because I was not at my computer when the first 2 had formed.
On the video Divergence shows a couple of other examples as well.