[r-t] Easter challenge

Simon Humphrey sh at keystrata.co.uk
Sun Apr 12 08:51:33 UTC 2009

> I like the concept of the plain course of a method generating the extent.
> On 5 bells, with a fixed treble and four working bells,  this gives 30
> changes per lead to play with.
There's a huge number of Doubles principles which generate a true extent in
the plain course.

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