[r-t] Lead-based methods [was: Poll on consecutive blows in the same position]

[Don Morrison]

On Mon, Dec 29, 2014 at 5:16 AM, Mark Davies <mark at snowtiger.net> wrote:
> Here is a simple example using a 5-bell RBM. Ring St Simons Doubles, except
> that if the 2 and 4 come together on the front, make places instead of
> dodging. If this method is started from rounds, the first lead looks like St
> Martins, the rest St Simons. However if started from e.g. 12534, there is no
> St Martins. This is a trivial example, but shows how RBMs differ from LBMs.

But, as Ander pointed out (assuming I've correctly understood what he
wrote) this is still an LBM, with one lead per course. The changes
that constitute a lead are different depending upon the starting row,
but in the absence of calls that's irrelevant. That's why last night I
said that calls are one, possibly the, thing that can discriminate
between the ill-defined concepts of LBM and RBM. But, of course, calls
are a whole new can of rabid, venomous worms.



-- 
Don Morrison <dfm at ringing.org>
"To repeat what everybody else was thinking was, in politics, the
mark not of an inferior but of a superior mind."
                -- Marcel Proust, _À la recherche du temps perdu_,
                   tr. C. K. Scott Moncrieff