[r-t] Backstroke 65s

[Graham John]

Joe Norton asks:

> In an extent of PB Minor using only standard calls,
> what is the maximum number of 65s at backstroke
> it is possible to get? ... But is it possible to get all
> the other 22 changes at backstroke?

The simple answer is yes, but only in a one part I think. There are
thousands possible, such as this one.

https://complib.org/composition/32658

Graham