Sorry if this was asked before but I could not find an answer to my doubt.
While trying to decide a new password for a given website I came across a password strength checker website that (somehow) claims that having a number in the middle positions of a password is better than having it at the beginning or the end.
Out of curiosity I have checked other websites dedicated to checking password strength like this and this, but none of them seems to see a difference between, say 4abcD and abc4D, as the first one does.
While I do not really believe such sites can be regarded as scientifically accurate, I am wondering if there is something true in the "claim" that having a middle number makes a password stronger than having the number at the first or last position. Does it really increase the entropy of the password?