[r-t] Extents of doubles

[Richard Smith]

Alexander Holroyd wrote:

> Can we see a list of the 101 2-blow ones?

http://ex-parrot.com/~richard/doubles/extents/principles-2-blows.txt

... But as I said, this may be incomplete because I might
have normalised K/O variants such that the 3-blow method is
chosen in preference to the 2-blow method.

> And maybe the legal glide-symmetrics (if there are any)?

140 methods:

http://ex-parrot.com/~richard/doubles/extents/principles-legal-glide.txt

(The same caveat applies: I shouldn't have lost any symmetry
whilst normalising K/O variants, but I may have gained
consecutive blows in one place.)

RAS